Nice job kids......tinkering is a gift from God......thre Wright Brothers only had 1 hs degree between the two of them and invented the airplane parttime in 3 years...making everything from the engine to the props....a good engineer/inventor has to have a lot of patience and this project proved it to you. Nice job......in 1962 when I was 12 I as sketching machines while everyone else was playing ball..... and it is so nice to see you minds working to make something.
@queefjeremy I suppose that in your view: Bob Pease, Jim Williams, Bob Widlar, Nikola Tesla, Guglielmo Marconi, Gottlieb Daimler, Nikolaus August Otto, and Many, many others are dumbasses, yet you are using modern technology that they all played a part in making it possible?? What exactly have you done for society that is useful? From the videos I have seen you are just a little punk screaming out your car like an idiot. I would say that YOU are the dumbass that will never go anywhere in life.
era un desene to stupid dogs a stricat motoru la turatia aia dabia se invarte el si presupun ca pt turatia lui normala si sa ajunga la 5 cai trebuia marita supapa de admisie si vro 200 de admosfere
@queefjeremy Oh the irony in what you said is priceless. That would have went over better if you too knew how to write proper English. You said, "ok if there such good engineers how come they cant fucking speak correctly". You CLEARLY improperly used the word "there" in your statement. Before you go pointing out other people's errors, you should know the difference in, "there, they're, and their".
You'll probably find it will run heaps better if you have a small tank say 1 liter capacity RIGHT at the inlet port. This tank will supply the sudden demand for air as the valve opens, something the air hose with small orifice cannot do very well. The air hose supplies this tank of course. You sometimes see this kind of setup on turbo'd engines.
its acctualy better backwards cuz of the sixe of the valves presure in small and force out the big so u made the right choice =3 (i know my spelling sux so just understand the point)
queef... I looked at your lame ass videos... let's see your air/steam engine? yea that's what I thought.. you don't have a clue how an engine works let alone how to modify one to run on something other than what it's originally intended to run on.
I can appreciate that these guys can explain it all... They seem to have a good future in mechanics.. I've been a heavy equipment mechanic for 15 years.. I know what goes into working on this stuff. I built one tonight.
You guys did great! I saw your video and figured I'd try it with an old 5 horse briggs.
I guess the cam I built worked out pretty well as it ran on the first try. I'm still not able to get many RPMs out of it though.. I think I need more volume of air flowing into it.
I also thought about making both valves open on the up stroke and both closing on the down stroke then pushing air in through the spark plug hole... might try that soon as I have another cam I can weld on. Good Job guys.
I don't know what your background is, what sort of experience you have, just as you don't know what my background is or what sort of experience I really have. I know my stuff, having even worked in professional motorsports before even turning 20 years old. I have absolutely nothing to prove to you, and I'm sorry this video completely ruined your day. As my buddy waslig said, go do some more oil changes and feel better about yourself.
Great work! You guys showed some real skill, and dedication to a project.
If that's what you guys do, just messing around for fun, I imagine you could accomplish much, when you get serious.
And to echo a previous poster, it's indeed nice to see young people with real mechanical ability. As I'm sure you're aware, most of your peers can't seem to change a car battery.
May I suggest, now building a boiler, and making it run on live steam? *L*
@MXmaniac237 hey man not cool lots of us know the same amount about engines some don't but the fact 4 strokes are even around kills me but me and lots of people know how a 4 stroke works and what and how a cam shaft works including many of use work on these day by day so you don't half to talk as if we are retarded and also the fact you wasted a nice old b&s engine is annoying but the fact is the people who don't know about engines will never even head of this crap or be looking it up so...
@MXmaniac237 Know what? If you're going to reply to someone and have it as a top comment DON'T FUCKING DELETE THE COMMENT! Fuck other people MIGHT want to see what he said you know?
I think you completely missed the purpose of this video. This was something we threw together as a high school project for a high school class. It was never meant for YouTube, the air motor was never meant to do anything more than cycle itself.
Why is it so important which direction we ran the engine? We had no argument for either direction, the engine wasn't intended to power anything.
Ben and myself are tinkerers, this is something we threw together in an afternoon.
It would have been far more idiotic to spend hours degreeing camshafts, and having a cam professionally ground, doing all sorts of R&D to meet such a simple goal. We never said grinding a camshaft is supposed to be a trial and error process. We used trial and error because it was the most cost-effective solution, and the method fully satisfied our design criteria.
@MXmaniac237 ignore the fool. i enjoyed your vid. nice job. less time explaining yourself to the likes of that and more time doing what you did here will keep my self and many others watching. as i said before nice job.
First of all your name is fuckin queef... Someone must have pissed in your fuckin Cheerios this morning man. My god. They were sophmores in high school and are now halfway to becoming engineers. why don't YOU go suck a dick and go do another oil change instead of writing an essay on fuckin youtube about how gay you are.
I think you just made a breakthrough on the fuel efficiency of future engines. Screw fuel man, i got an air powered motor, plus you wont die if you breathe its exhaust, ha ha ha ha
@reducedfat11 yeah, but your just cycling the piston continuously with a 2 stroke engine, a up and down stroke, that's it, basically what this converted 4 stroke is now, a 2 stroke air engine.
the up stroke empties the cylinder and the down stroke takes the air in, driving the drive shaft, simple as that, right?
@flamedrag18 exactly but if you just used a two stroke engine with no valve you would be putting pressure on the piston all the time therefore the piston would sit at the bottom of the stroke and air would just leave through the ports. now if you had a way to time the air pulses it would work
@flamedrag18 no, air pressure would be on the piston all the time and keep the piston from coming back up. you can use a sprinkler solenoid valve and a magnet switch and time it off the flywheel, but if you have access to a welder the method these guys did is much easier and cheaper. besides, old 3.5hp briggs classics are a dime a dozen
What if you ground the exhaust lobe down to the football shape you mentioned and just got rid of the intake completely? Wouldn't that make it so the piston had less resistance when traveling up? Or is that what you guys did already?
dude its a school project, we all did something weird for a school project one point in time, i built a hovercraft for my sixth grade project. not everybody knows about how a motor works, let alone a diesel or compressed air starter or something of that nature.
Better yet Do YOU know what a Cam shaft is do YOU know how the basic 4 stroke engine works do YOU know that most people who searched this probably already knew about engines. do YOU know that most people Knew this before they took a small engine class? Fuck my school hasen't even mentioned the word small engine and I already know how to go through and rebuild a whole engine. did YOU know that?
i made one out of a tecumseh motor, except mine only runs for a few seconds because my compressor doesnt make enough pressure to keep it running. and just to tell you, you put the inlet connector thing on the exhaust port
i dont mean to piss in your cheerios but you made the air going into the exhaust port, not the intake. but i guess it works either way. cool engine nonetheless
@BUNCHofxs Probably the biggest problems are the engine running backwards, easily fixed by moving the air fitting to the other port and the overlap of the inlet and exhaust. Some more tweaking on the shape and profile will allow the exhaust to be ully closed before the inlet opens and you wont have huge ammounts of air escaping.
@BUNCHofxs Probably the biggest problems are the engine running backwards, easily fixed by moving the air fitting to the other port and the overlap of the inlet and exhaust. Some more tweaking on the shape and profile will allow the exhaust to be fully closed before the inlet opens and you wont have huge ammounts of air escaping.
nice job guys! just out of curiosity, how did you modify the cam? it almost looks like you stacked welds on one side and then grinded them smooth.... either way, good job!
I saw your video pop up on my screen and was interested to watch it That is pretty creative by grinding down sections of the cam shaft. I like to build turbo jet engines on my spare time. check out some of my videos.
Glad to see you got it to work :) You had way too much intake valve duration when you started, so it was holding the piston at the bottom of the stroke. Check out the vid I just uploaded, it did require a lot of trial and error! I have also built one with a full speed camshaft using 3 crankshaft sized gears, it works pretty well.
Don't underestimate how valuable this kind of information could become if the economy fails and the power grid goes down, You can build a fire under a boiler and run an engine like this from steam and attach an auto alternator and have electricity.,... maybe even an air conditioner compressor from a car.. and heater fan from a car... for sure the lights. Yeah, I'll live in a van under the bridge down by the river.
This is so much easier with a 2 stroke engine because you don't have to mess around with any valves and timing. But you don't have a lubricating system. So.... why not remove the intake valve and seal the hole and feed the air into the sparkplug hole on a 4 stroke?
@Terryblount if you did that the air pressure would hold the piston at the bottom of the stroke. same thing would happen with a 2 stroke. to do it like that you would need an electronic valve (sprinkler solenoid) and a magnet switch and time it off the flywheel
good job but when you think about it a normal engine does the same thing all you guys did was make it highly inefficient.....its cool but not practical
Well the easiest way to do that would be to put the coil back onto the engine, and use a Tach, because that would give you your RPMS, just like it would if it was running off of gas... Be sure to get a Tach for something like go-karts, car Tach will work, but they're not accurate on these engines.
hey one thing not all people are dumb and need thing explained Because if you think for more than a sec you would figure out that who are the people that looks at this stuff
So all i have to do i round off the camshaft? Can you send me some pics on what it should look like? Also how did you rig that fitting for the air hose? Also did u put the camshaft back in its same place or did you rotate it diferently? Email me.
So patronizing. Who doesn't know what a camshaft is ? I'm not surprised it took you so long looking at your grinding skills. Even once it was going you could tell it still had a shit load of friction thanks to your POS cams.
who doesn't know what a camshaft is? everybody in my high school physics class that this video was made for. i didn't make this video for youtube, it was a school project. and sorry i don't have access to a cam grinder, nor would i ever want to waste that kind of time and money on a project like this. calm down, you're missing the point of this experiment.
Really? The internal combustion engine is such a big part of modern life. I really would have thought it's basic operation would have been covered way before high school. If the video was made for preschoolers your assumptions would have been acceptable.
you would think people would know, but they don't. what makes you think you know the people at my school better than i do? i made an A+ on this project so i obviously didn't insult my class(they are the ones that had to grade it) nor my teacher.
I never said I didn't believe you, it just surprises me. In any case its not really a good idea to tell an audience they won't know what something is, even if they probably won't. It pretty much always sounds condescending. The rest of the video was pretty good , though an A+ is generous.
i know exactly what drives the air compressor. we just wanted to show our high school physics class how compressed air can be converted into mechanical motion. and compressed air engines have served plenty of purposes for hundreds of years, they just called them steam engines. same thing.
Fair enough, but an air rifle would have demonstrated the point with a lot less effort. I suppose I'm just irritated by the number of people (including "science" reporters!) who blindly extol the merits of the pollution free compressed air engine (exactly which internal engine doesn't involve the compression of air I'm yet to discover) and think it's some great breakthrough. You managed to pick the one example of an engine that doesn't use compressed air. Steam engines use the vaporisation of wa
whoa i never made any mention of emissions in my video. obviously energy is required to compress the air that goes into this air motor. i never claimed it was "pollution free". and a steam engine will run just as well on compressed air as it does with steam. the vaporisation of water in the boiler builds pressure, which is used to power the engine. its the exact same as my air motor. my air motor will run on steam, and a steam engine will run on compressed air.
your idiots , all you had to do was mount a magnetic reed switch on the flywheel everytime it comes around it fires an air solenoid letting air in the engine, this way the air is constant , the engine is not ruined and you can modify timing by moving it around the flywheel.
its nice to say to people, that they have no idea what a cam shaft is, or evena a crank, so if you guyz know so much what is the lift and deration on that 5hp briggs on that engine.
obviously you didn't read the description. we made this video to present to our high school physics class, not to post on youtube. i can guarantee no one in my class knew what a camshaft was. if you're so smart why can't you even spell duration?
it will free it up a lot and its not high pressure like a engine is running also the oil ring is like a supporting ring so the piston dose not slop around
Very cool work, guys! I have an old non-working Briggs out in my garage right now, I might just end up trying this out.
Dont listen to the sub-par IQ commenters here. They dont understand building something for fun and probably never will. Oh well, we need burger flippers!
i never wanted it to power anything. i just wanted it to turn.
and i didn't waste a perfectly running motor. the motor never ran to begin with, and when i was done with this little experiment i put a stock camshaft back in and got it running on gasoline again. all i ruined was an old camshaft, big deal.
Why didn't you simply double the speed of the camshaft rather than taking the time to add a lobe? seems it would have been easier to re-gear the cam to run the same speed as the crankshaft.
because the cam gear and cam are all the same piece, they are cast together. i would have needed to machine the gear off the cam, mount a gear 1/2 the size, and run a chain between the new cam gear and the crank gear. then i would have needed to replace the crank gear so one that will accept a timing chain. so to answer your question, yes i did think about that and it would work perfectly, but its harder to fabricate.
It runs better clockwise the way its spose to run, i have turned a small engine backwards and there is a point in the cam were it gets harder to turn, thats why this one dosn't run so well.
To add to my other comment GSpotr, it is hard on the engine to run it backwards because the oil slinger is throwing oil at the wall of the crank case and not getting much oil on the cam.
Yet this was just a fun idea you guys actually just saved the world!!!!! Power to the planet using are as a fuel. Quick tip re use the magneto to generate power to store in a battery or power converter to power the air compressor. With enough air preasure you can get great results.
Great experiment guys, most of the cynics don't understand this was an experiment with a donated engine. Don't give up on this stuff ,you boys could be great engineers or engine builders of the future
i feelt the same way when i built my first air motor, just about shit my self....lol
get a scuba tank, and use the regulator that u have and slowly add air still try and start at 60m psi since that works best. im working on the same thing and i am going to mount it on my mini chopper! i will also add a fitting on the tank to fill up at a air pump at a gas station!
That was way cool. You should power it with compressed air that you did yourselves with a bicycle pump. Looking forward to other projects that you do.
your idea is good try using a four cylinder engine or any internal combustion engine modify the cams then add a turbo one that has an electronic waste gate, your incoming air pressure 60 psi the turbo will boost it up on demand the boost going in also will heat up the air and it will expand even more you can get wild add a glow plug in the spark plug hole, I do believe the amount of air consumed will be less but you will gain a lot of power, keep at it !!
Hey, you also got a compressor pump there, add another petrol engine to drive it, or an electric then hey presto, you have a high pressure compressor.
What is the point of this? Now you have a 5hp engine that would turn 3600 rpm that now turns about 300 rpm and puts out about 1/2 hp. If you need an air engine that bad get yourself and air impact or air grinder or any of the other air tools.
the point of this was just to see if we could get it to work, and as a demonstration for my physics class. i'd never dream of trying to actually use it for anything.
great video dudes if you beef up your intake spring that will allow you to increase your intake pressure which in turn will give you more power because after a certain psi your intake valve springs will start to give out there may be a spec i am not sure but i know 65 psi should be very well because the spec on a compression test for a brigg is 50 psi i know that from working on them however by increaseing your spring pressure on your intake valves will increase wear on your cam shaft you may be
prety nice, but you know that without oil ( you said you converted it to a 2 stroke so the oil would come in with the gass) the whole engine will heat up and the metal will size up after a few min of opperation. you can even hear the metal scraping itself in the 60 psi test
nice vid probabley didnt have to modify the cam it should have worked with that being the way it was. all you had to do is plug the spark plug hole. and replace the cabrator with the air compreser conection. And not all people dont know how a motor works but nice vid.
You have it running wrong. You put the air on the exhaust port and so now the intake is exhaust. You switched it.
LaPavoniMac 1 month ago
Cool :)
fredriktaaje 2 months ago
U got it runnin ass backwards
shadetreemechanic77 2 months ago
Nice job kids......tinkering is a gift from God......thre Wright Brothers only had 1 hs degree between the two of them and invented the airplane parttime in 3 years...making everything from the engine to the props....a good engineer/inventor has to have a lot of patience and this project proved it to you. Nice job......in 1962 when I was 12 I as sketching machines while everyone else was playing ball..... and it is so nice to see you minds working to make something.
Best to you both
Dan
MOFFETTEE 2 months ago
Step 1: Lubricate.....
13Anko 3 months ago
Pointless fun. I like it.
177SCmaro 5 months ago
@queefjeremy I suppose that in your view: Bob Pease, Jim Williams, Bob Widlar, Nikola Tesla, Guglielmo Marconi, Gottlieb Daimler, Nikolaus August Otto, and Many, many others are dumbasses, yet you are using modern technology that they all played a part in making it possible?? What exactly have you done for society that is useful? From the videos I have seen you are just a little punk screaming out your car like an idiot. I would say that YOU are the dumbass that will never go anywhere in life.
EETechs 6 months ago
why did you put the air in the exhaust valve instead of the intake?
outdoorsman310 7 months ago
era un desene to stupid dogs a stricat motoru la turatia aia dabia se invarte el si presupun ca pt turatia lui normala si sa ajunga la 5 cai trebuia marita supapa de admisie si vro 200 de admosfere
geonylove 8 months ago
so you just ground the cam down and reshaped it correct? did you add any more metal to the lobes of the cam?
wastelandprovince 9 months ago
Congratulations you invented the steam engine lol
MIKT725 9 months ago
@queefjeremy Oh the irony in what you said is priceless. That would have went over better if you too knew how to write proper English. You said, "ok if there such good engineers how come they cant fucking speak correctly". You CLEARLY improperly used the word "there" in your statement. Before you go pointing out other people's errors, you should know the difference in, "there, they're, and their".
Hahahahaha
Lavinco 9 months ago 2
They had fun doing it...Right ;)..... Next stop "Makers Fair"...
Mrdoctile 9 months ago
You'll probably find it will run heaps better if you have a small tank say 1 liter capacity RIGHT at the inlet port. This tank will supply the sudden demand for air as the valve opens, something the air hose with small orifice cannot do very well. The air hose supplies this tank of course. You sometimes see this kind of setup on turbo'd engines.
Circlotron 9 months ago
its acctualy better backwards cuz of the sixe of the valves presure in small and force out the big so u made the right choice =3 (i know my spelling sux so just understand the point)
xoxoXoieoxox 9 months ago
Cool, and good idea. Only one thing though, the motor is turning backwards! I dont know if you kicked it the other way it would spin that way or not
shaunk132 9 months ago
hey just wondering....did u fill it with oil? or just let it run dry?
SuperJonnysoul 10 months ago
nice job boys keep it up
grumpydumper 1 year ago
@hornesam001 i had a 4.5 briggs lawn mower that had a plastic cam :(
pivotboy63 1 year ago
queef... I looked at your lame ass videos... let's see your air/steam engine? yea that's what I thought.. you don't have a clue how an engine works let alone how to modify one to run on something other than what it's originally intended to run on.
I can appreciate that these guys can explain it all... They seem to have a good future in mechanics.. I've been a heavy equipment mechanic for 15 years.. I know what goes into working on this stuff. I built one tonight.
sailorjohn35 1 year ago
You guys did great! I saw your video and figured I'd try it with an old 5 horse briggs.
I guess the cam I built worked out pretty well as it ran on the first try. I'm still not able to get many RPMs out of it though.. I think I need more volume of air flowing into it.
I also thought about making both valves open on the up stroke and both closing on the down stroke then pushing air in through the spark plug hole... might try that soon as I have another cam I can weld on. Good Job guys.
sailorjohn35 1 year ago
@queefjeremy
I don't know what your background is, what sort of experience you have, just as you don't know what my background is or what sort of experience I really have. I know my stuff, having even worked in professional motorsports before even turning 20 years old. I have absolutely nothing to prove to you, and I'm sorry this video completely ruined your day. As my buddy waslig said, go do some more oil changes and feel better about yourself.
MXmaniac237 1 year ago
@MXmaniac237
Great work! You guys showed some real skill, and dedication to a project.
If that's what you guys do, just messing around for fun, I imagine you could accomplish much, when you get serious.
And to echo a previous poster, it's indeed nice to see young people with real mechanical ability. As I'm sure you're aware, most of your peers can't seem to change a car battery.
May I suggest, now building a boiler, and making it run on live steam? *L*
skeilak 1 year ago
@MXmaniac237 hey man not cool lots of us know the same amount about engines some don't but the fact 4 strokes are even around kills me but me and lots of people know how a 4 stroke works and what and how a cam shaft works including many of use work on these day by day so you don't half to talk as if we are retarded and also the fact you wasted a nice old b&s engine is annoying but the fact is the people who don't know about engines will never even head of this crap or be looking it up so...
minibikerider1 5 months ago
@MXmaniac237 Know what? If you're going to reply to someone and have it as a top comment DON'T FUCKING DELETE THE COMMENT! Fuck other people MIGHT want to see what he said you know?
14omega28ok 3 months ago
@queefjeremy
I think you completely missed the purpose of this video. This was something we threw together as a high school project for a high school class. It was never meant for YouTube, the air motor was never meant to do anything more than cycle itself.
Why is it so important which direction we ran the engine? We had no argument for either direction, the engine wasn't intended to power anything.
Ben and myself are tinkerers, this is something we threw together in an afternoon.
MXmaniac237 1 year ago
@queefjeremy
It would have been far more idiotic to spend hours degreeing camshafts, and having a cam professionally ground, doing all sorts of R&D to meet such a simple goal. We never said grinding a camshaft is supposed to be a trial and error process. We used trial and error because it was the most cost-effective solution, and the method fully satisfied our design criteria.
MXmaniac237 1 year ago
@MXmaniac237 ignore the fool. i enjoyed your vid. nice job. less time explaining yourself to the likes of that and more time doing what you did here will keep my self and many others watching. as i said before nice job.
hrsqsiest 1 year ago
@queefjeremy
hey queer Jeremy you are a faggot. That is all
waslig 1 year ago
@queefjeremy 99 out of a hundred people won't know. trust me.
demonofrazgriz333 1 year ago
@queefjeremy.
First of all your name is fuckin queef... Someone must have pissed in your fuckin Cheerios this morning man. My god. They were sophmores in high school and are now halfway to becoming engineers. why don't YOU go suck a dick and go do another oil change instead of writing an essay on fuckin youtube about how gay you are.
waslig 1 year ago
I think you just made a breakthrough on the fuel efficiency of future engines. Screw fuel man, i got an air powered motor, plus you wont die if you breathe its exhaust, ha ha ha ha
JDTVEXTREMEVIDEOS 1 year ago
so essentially, you can just connect a compressor to a 2 stroke engine through the spark plug threads and make a compressed air engine?
flamedrag18 1 year ago
@flamedrag18 no the 2 stroke would still have a compression stroke therefore you need the valves to regulate when the air is injected into the motor
reducedfat11 1 year ago
@reducedfat11 yeah, but your just cycling the piston continuously with a 2 stroke engine, a up and down stroke, that's it, basically what this converted 4 stroke is now, a 2 stroke air engine.
the up stroke empties the cylinder and the down stroke takes the air in, driving the drive shaft, simple as that, right?
flamedrag18 1 year ago
@flamedrag18 exactly but if you just used a two stroke engine with no valve you would be putting pressure on the piston all the time therefore the piston would sit at the bottom of the stroke and air would just leave through the ports. now if you had a way to time the air pulses it would work
reducedfat11 1 year ago
@flamedrag18 no, air pressure would be on the piston all the time and keep the piston from coming back up. you can use a sprinkler solenoid valve and a magnet switch and time it off the flywheel, but if you have access to a welder the method these guys did is much easier and cheaper. besides, old 3.5hp briggs classics are a dime a dozen
pivotboy63 1 year ago
What if you ground the exhaust lobe down to the football shape you mentioned and just got rid of the intake completely? Wouldn't that make it so the piston had less resistance when traveling up? Or is that what you guys did already?
the70stang 1 year ago
@the70stang Nevermind I just watched your other video. That is exactly what you guys did. Great job guys!
the70stang 1 year ago
lol good work, that is the funniest sounding motor i've ever heard. Nice Job!
whatsdare 1 year ago
Good job, guys!
MrJOHNdx 1 year ago
So you turned a gasp powered engine into almost a air compressor that takes air to run? :S Lol
Bunkers101 1 year ago
wow nice! GREAT SKILLS!!!
coppincopp 1 year ago
What a waste of a good,solid,engine...man
xXSOKkenrusXx 1 year ago
dude its a school project, we all did something weird for a school project one point in time, i built a hovercraft for my sixth grade project. not everybody knows about how a motor works, let alone a diesel or compressed air starter or something of that nature.
not2hye 1 year ago
Better yet Do YOU know what a Cam shaft is do YOU know how the basic 4 stroke engine works do YOU know that most people who searched this probably already knew about engines. do YOU know that most people Knew this before they took a small engine class? Fuck my school hasen't even mentioned the word small engine and I already know how to go through and rebuild a whole engine. did YOU know that?
14omega28ok 1 year ago
why the engine is running backward?
super00fiss 1 year ago
so you basically made a 2 stroke with a cam...then added air?
333JIMB0333 1 year ago
i made one out of a tecumseh motor, except mine only runs for a few seconds because my compressor doesnt make enough pressure to keep it running. and just to tell you, you put the inlet connector thing on the exhaust port
pivotboy63 1 year ago
Im 12 and i did this except i didnt screw the plug into the spark plug hole (to stop the air simply rushing out the top) and it hit me in the face
balls2yourface 1 year ago
i dont mean to piss in your cheerios but you made the air going into the exhaust port, not the intake. but i guess it works either way. cool engine nonetheless
pivotboy63 1 year ago
Trim some weight off the fly wheel that might help get more rpms
BUNCHofxs 1 year ago
@BUNCHofxs Probably the biggest problems are the engine running backwards, easily fixed by moving the air fitting to the other port and the overlap of the inlet and exhaust. Some more tweaking on the shape and profile will allow the exhaust to be ully closed before the inlet opens and you wont have huge ammounts of air escaping.
maccacoffee 1 year ago
This has been flagged as spam show
@BUNCHofxs Probably the biggest problems are the engine running backwards, easily fixed by moving the air fitting to the other port and the overlap of the inlet and exhaust. Some more tweaking on the shape and profile will allow the exhaust to be fully closed before the inlet opens and you wont have huge ammounts of air escaping.
maccacoffee 1 year ago
nice job guys! just out of curiosity, how did you modify the cam? it almost looks like you stacked welds on one side and then grinded them smooth.... either way, good job!
XmotorheadX1369 1 year ago
:O frankensteins camshaft lol
rus0004 1 year ago
I saw your video pop up on my screen and was interested to watch it That is pretty creative by grinding down sections of the cam shaft. I like to build turbo jet engines on my spare time. check out some of my videos.
honeybunchickens 1 year ago
chek mower custom exhause 22
shadownathcool 1 year ago
you two guys have done more than all the people who comment on this project. good on you! we need more youngsters to work with their hands
jjmqwerty 1 year ago
You should have the PSI regulator mounted at the head intake and then the air line goes into it for an accurate drive reading.
SirTragain 1 year ago
Glad to see you got it to work :) You had way too much intake valve duration when you started, so it was holding the piston at the bottom of the stroke. Check out the vid I just uploaded, it did require a lot of trial and error! I have also built one with a full speed camshaft using 3 crankshaft sized gears, it works pretty well.
Nice vid, well explained. :) 5 Stars Dudes.
ChargerMiles007 1 year ago
you still have to have an air supply......so how long would it run on a tank of air?......and how you gonna make 60 psi from a tank of air?
jeepers2655 1 year ago
Someone can blow through the air line using a fat man with pair of lungs...
bigmacx345 1 year ago
Don't underestimate how valuable this kind of information could become if the economy fails and the power grid goes down, You can build a fire under a boiler and run an engine like this from steam and attach an auto alternator and have electricity.,... maybe even an air conditioner compressor from a car.. and heater fan from a car... for sure the lights. Yeah, I'll live in a van under the bridge down by the river.
Terryblount 1 year ago
This is so much easier with a 2 stroke engine because you don't have to mess around with any valves and timing. But you don't have a lubricating system. So.... why not remove the intake valve and seal the hole and feed the air into the sparkplug hole on a 4 stroke?
Terryblount 1 year ago
@Terryblount if you did that the air pressure would hold the piston at the bottom of the stroke. same thing would happen with a 2 stroke. to do it like that you would need an electronic valve (sprinkler solenoid) and a magnet switch and time it off the flywheel
pivotboy63 1 year ago
what is it's reason 4-what
Ronfox58 1 year ago
Nice! I used a 3.5HP with JBweld to mod the cam and it runs on 20PSI.
SuperKONR 2 years ago 2
good job but when you think about it a normal engine does the same thing all you guys did was make it highly inefficient.....its cool but not practical
spikerbrad23 2 years ago
you are running it backwards so your valves are actually the total opposite way you said they were you have the air going thru the exhaust valve/port
GarrettJDB 2 years ago
really bad camera
battleshiprail 2 years ago
is modding the cam all you had to do internally?
BeboAltizer 2 years ago 2
how many cfm does this require??
travisbrkr1234 2 years ago
Nice to see a few more people under age 50 with mechanical skill. Theres not many of us left.
cumminsfan 2 years ago 36
@cumminsfan indeed.
demonofrazgriz333 1 year ago
ha, try running it on, like 5000 psi. ha ha ha ha ha SNORT ha ha ha ha SNORT ha ha.
fannybaba 2 years ago
Comment removed
pivotboy63 2 years ago
DAYUM
master777999 2 years ago
Good job guys!
sbukosky 2 years ago
put a gage on there and find out rpms kk
OakTreeMRJ 2 years ago
Well the easiest way to do that would be to put the coil back onto the engine, and use a Tach, because that would give you your RPMS, just like it would if it was running off of gas... Be sure to get a Tach for something like go-karts, car Tach will work, but they're not accurate on these engines.
Chevypower265 2 years ago
hey one thing not all people are dumb and need thing explained Because if you think for more than a sec you would figure out that who are the people that looks at this stuff
OakTreeMRJ 2 years ago
Nice Job!!
and nice video too!
I had the idea to build something like that but with stream made from water in a natural gaz bottle itself on a big fire.
ciclotronforever 2 years ago
I still don't see what you were trying to demonstrate. ALL engines are compressed air engines. This is just a particularly inefficient one!
nem427 2 years ago
So all i have to do i round off the camshaft? Can you send me some pics on what it should look like? Also how did you rig that fitting for the air hose? Also did u put the camshaft back in its same place or did you rotate it diferently? Email me.
MARINESARETHESHIT 2 years ago
So patronizing. Who doesn't know what a camshaft is ? I'm not surprised it took you so long looking at your grinding skills. Even once it was going you could tell it still had a shit load of friction thanks to your POS cams.
qwertypenis 2 years ago
who doesn't know what a camshaft is? everybody in my high school physics class that this video was made for. i didn't make this video for youtube, it was a school project. and sorry i don't have access to a cam grinder, nor would i ever want to waste that kind of time and money on a project like this. calm down, you're missing the point of this experiment.
MXmaniac237 2 years ago
Really? The internal combustion engine is such a big part of modern life. I really would have thought it's basic operation would have been covered way before high school. If the video was made for preschoolers your assumptions would have been acceptable.
qwertypenis 2 years ago
you would think people would know, but they don't. what makes you think you know the people at my school better than i do? i made an A+ on this project so i obviously didn't insult my class(they are the ones that had to grade it) nor my teacher.
MXmaniac237 2 years ago
I never said I didn't believe you, it just surprises me. In any case its not really a good idea to tell an audience they won't know what something is, even if they probably won't. It pretty much always sounds condescending. The rest of the video was pretty good , though an A+ is generous.
qwertypenis 2 years ago
good job, did you guys take the compression rings off?
steveo928 2 years ago
nope, we never took the piston out of the cylinder so the rings stayed in.
MXmaniac237 2 years ago
Whilst I may not know what a camshaft is, I do know that compressed air engines basically serve no purpose. What drives the air compressor boys....?
nem427 2 years ago
i know exactly what drives the air compressor. we just wanted to show our high school physics class how compressed air can be converted into mechanical motion. and compressed air engines have served plenty of purposes for hundreds of years, they just called them steam engines. same thing.
MXmaniac237 2 years ago
Fair enough, but an air rifle would have demonstrated the point with a lot less effort. I suppose I'm just irritated by the number of people (including "science" reporters!) who blindly extol the merits of the pollution free compressed air engine (exactly which internal engine doesn't involve the compression of air I'm yet to discover) and think it's some great breakthrough. You managed to pick the one example of an engine that doesn't use compressed air. Steam engines use the vaporisation of wa
nem427 2 years ago
whoa i never made any mention of emissions in my video. obviously energy is required to compress the air that goes into this air motor. i never claimed it was "pollution free". and a steam engine will run just as well on compressed air as it does with steam. the vaporisation of water in the boiler builds pressure, which is used to power the engine. its the exact same as my air motor. my air motor will run on steam, and a steam engine will run on compressed air.
MXmaniac237 2 years ago
how do you prevent it becoming to hot becuz of friction?
oil inside the air?
bronie12345 2 years ago
we don't run it long enough for it to get hot.
MXmaniac237 2 years ago
well, when you run it longer, i suggest using vaporized oil inside the air (very small oil drops)
bronie12345 2 years ago
It doesn't get too hot from running on compressed air.
Skoda130 2 years ago
becuz the air cooling :P
bronie12345 2 years ago
No, "becuz" there's no combustion heat. The heat produced by friction allone is comperatively very small.
Skoda130 2 years ago
know
but still, it could be enough to get it "overheated"
bronie12345 2 years ago
Maybe, if you don't put any lubricants in it.
Skoda130 2 years ago
thats why i suggested the vaporized oil in the air
bronie12345 2 years ago
It wasn't a two-stroke engine, but a four-stroke that probably just had oil in it's carter already.
Skoda130 2 years ago
jup
anyway, overheating could still be done...
just run it for a long, long time :P
besides that, i dont see a good way to get it overheated
bronie12345 2 years ago
No, then it would just wear out after some weeks/months/years.
A good way to get it overheated.. Hmm.. No oil, no airflow guides around the fan, fill it up with gas, and run it full throttle.
Skoda130 2 years ago
that'll work
bronie12345 2 years ago
your idiots , all you had to do was mount a magnetic reed switch on the flywheel everytime it comes around it fires an air solenoid letting air in the engine, this way the air is constant , the engine is not ruined and you can modify timing by moving it around the flywheel.
Mastahscott 2 years ago
we didn't have a magnetic reed switch, nor a solenoid.
MXmaniac237 2 years ago
@Mastahscott if you have access to a welder, this method is far simpler and cheaper. i could probably find a used cam for the price of the solenoid
pivotboy63 1 year ago
its nice to say to people, that they have no idea what a cam shaft is, or evena a crank, so if you guyz know so much what is the lift and deration on that 5hp briggs on that engine.
Bohicag 2 years ago 6
obviously you didn't read the description. we made this video to present to our high school physics class, not to post on youtube. i can guarantee no one in my class knew what a camshaft was. if you're so smart why can't you even spell duration?
MXmaniac237 2 years ago
there are WAY more efficient ways to turn a flywheel with compressed air, this is basically just extra parts.
darksoulPS 2 years ago
so you built it, now what are you gonna do with it?
j4p18w80 2 years ago
converted it back to run on gasoline and gave it back to the people that loaned us the engine.
MXmaniac237 2 years ago
Awesome! Great job, dudes!
themaritimeman 2 years ago
Haha the font at the beginning is a standard font with Mac OSX. LOL! Sorry geek moment!
djrock9000 2 years ago
take off the second compressor ring since its not compressing air anyways
30GB 2 years ago
is that gonna free it up or just loose lots of air thru the crank case?
tmoore92c 2 years ago
it will free it up a lot and its not high pressure like a engine is running also the oil ring is like a supporting ring so the piston dose not slop around
30GB 2 years ago
have you ever dun that or is it just a good idea?
tmoore92c 2 years ago
of course ive done it but to a running engine it increased rpm but less power
30GB 2 years ago
thanks
tmoore92c 2 years ago
ur running it the wrong way. Its harder to go that way. Run it clockwise and it will go better.
brendonv101 2 years ago
Very cool work, guys! I have an old non-working Briggs out in my garage right now, I might just end up trying this out.
Dont listen to the sub-par IQ commenters here. They dont understand building something for fun and probably never will. Oh well, we need burger flippers!
EnosShenk 2 years ago 3
you should make it a direct air injection. (make air come in where spark plug is)
marffy30 2 years ago
So the air goes into the exaust port, and the air goes out the intake port.
19531998 2 years ago
The exhaust valve timing is a little off. But Good job anyway - it runs.
radicalnegative1 2 years ago
you wasted a perfectly running motor. besides you might get it to turn but you cant power any thing with it.
cbradiotechman 2 years ago
Comment removed
Bobbymitchell10 2 years ago
i never wanted it to power anything. i just wanted it to turn.
and i didn't waste a perfectly running motor. the motor never ran to begin with, and when i was done with this little experiment i put a stock camshaft back in and got it running on gasoline again. all i ruined was an old camshaft, big deal.
MXmaniac237 2 years ago
Why didn't you simply double the speed of the camshaft rather than taking the time to add a lobe? seems it would have been easier to re-gear the cam to run the same speed as the crankshaft.
im1469 2 years ago
because the cam gear and cam are all the same piece, they are cast together. i would have needed to machine the gear off the cam, mount a gear 1/2 the size, and run a chain between the new cam gear and the crank gear. then i would have needed to replace the crank gear so one that will accept a timing chain. so to answer your question, yes i did think about that and it would work perfectly, but its harder to fabricate.
MXmaniac237 2 years ago
I noticed when you "Kick Started" the engine, it's running backwards as compared to normal..
Will it only run in one direction?
Or was it easier to get it started running counter-clockwise?
GSpotr 2 years ago
It runs better clockwise the way its spose to run, i have turned a small engine backwards and there is a point in the cam were it gets harder to turn, thats why this one dosn't run so well.
D342DIESEL 2 years ago
To add to my other comment GSpotr, it is hard on the engine to run it backwards because the oil slinger is throwing oil at the wall of the crank case and not getting much oil on the cam.
D342DIESEL 2 years ago
duh why didnt you run a air compressor backwards stupid it would have been easier
1reginol 2 years ago
if u seal off the crank case so it is air tight it will run on lower pressure.
kingpin123333333 2 years ago
dude you got spicoli shoes!!!
turfshredder 2 years ago
Yet this was just a fun idea you guys actually just saved the world!!!!! Power to the planet using are as a fuel. Quick tip re use the magneto to generate power to store in a battery or power converter to power the air compressor. With enough air preasure you can get great results.
PrestonTimmons 2 years ago
--good ,now I know when my lawn mower goes out !!!! show some more videos. Thanks
morfin1 2 years ago
Great experiment guys, most of the cynics don't understand this was an experiment with a donated engine. Don't give up on this stuff ,you boys could be great engineers or engine builders of the future
kerrynzl 3 years ago
thanks, i'm glad you liked it.
MXmaniac237 2 years ago
i feelt the same way when i built my first air motor, just about shit my self....lol
get a scuba tank, and use the regulator that u have and slowly add air still try and start at 60m psi since that works best. im working on the same thing and i am going to mount it on my mini chopper! i will also add a fitting on the tank to fill up at a air pump at a gas station!
superfunnyman123 3 years ago
haha cool!!
ACD19farmboy 3 years ago
what exactly did u change to get it to start?
creamyfilling102 3 years ago
That was way cool. You should power it with compressed air that you did yourselves with a bicycle pump. Looking forward to other projects that you do.
Madfisherman2 3 years ago
Good job fellas...
KOOLDAVE1953 3 years ago
for those that wonder whats the point, dont forget that this will run on steam, zero depndence on anything but making a fire
26667030 3 years ago
It is pretty much a steam engine.
mikeycomputer 3 years ago
did u feed air stright in to the intake?
superfunnyman123 3 years ago
dude this may sound childish but u should try to put it on a gokart but it would be ALOT of work
camarolover1982 3 years ago
you should try pre heating the air after the valve.. and cut down on air use.
josephdupont 3 years ago 2
What could they use to preheat it that wouldn't require another power source?
jessehattabaugh 2 years ago
Good Job, I understand the hard work that is evolved. When i build my Turbo-Jet Engine it was a lot of trail and error.
Rx7Nut 3 years ago
your idea is good try using a four cylinder engine or any internal combustion engine modify the cams then add a turbo one that has an electronic waste gate, your incoming air pressure 60 psi the turbo will boost it up on demand the boost going in also will heat up the air and it will expand even more you can get wild add a glow plug in the spark plug hole, I do believe the amount of air consumed will be less but you will gain a lot of power, keep at it !!
rufustune 3 years ago
Hey, you also got a compressor pump there, add another petrol engine to drive it, or an electric then hey presto, you have a high pressure compressor.
Cringle84 3 years ago
Cool, i love them little 5hp briggs
roboman79 3 years ago
You do relise that engine is the same thing that is used to compress that air in the first place. It is only a compressor that was self powered.
bargainbin 3 years ago
yes, i do realize that. but it showed my physics class how air pressure can be converted to mechanical motion.
MXmaniac237 2 years ago
What is the point of this? Now you have a 5hp engine that would turn 3600 rpm that now turns about 300 rpm and puts out about 1/2 hp. If you need an air engine that bad get yourself and air impact or air grinder or any of the other air tools.
bargainbin 3 years ago
the point of this was just to see if we could get it to work, and as a demonstration for my physics class. i'd never dream of trying to actually use it for anything.
MXmaniac237 2 years ago
great video dudes if you beef up your intake spring that will allow you to increase your intake pressure which in turn will give you more power because after a certain psi your intake valve springs will start to give out there may be a spec i am not sure but i know 65 psi should be very well because the spec on a compression test for a brigg is 50 psi i know that from working on them however by increaseing your spring pressure on your intake valves will increase wear on your cam shaft you may be
coolrobbins69 3 years ago
we thought about that but didn't have access to stronger valve springs, but thanks for the advice.
MXmaniac237 2 years ago
prety nice, but you know that without oil ( you said you converted it to a 2 stroke so the oil would come in with the gass) the whole engine will heat up and the metal will size up after a few min of opperation. you can even hear the metal scraping itself in the 60 psi test
crazy1russian 3 years ago
Isn't the intake-valve constantly leaking? I mean: It opens WITH, and not AGAINST the air current, doesn't it?
Skoda130 3 years ago
yes, that's a big part of why making a gas engine run on compressed air just doesn't work well. it will work, but not well.
MXmaniac237 2 years ago
A two-stroke would be more suitable, with a solenoid or bash-valve to replace the spark plug.
Skoda130 2 years ago
Nice.
Very good job :)
smokey65662 3 years ago
nice vid probabley didnt have to modify the cam it should have worked with that being the way it was. all you had to do is plug the spark plug hole. and replace the cabrator with the air compreser conection. And not all people dont know how a motor works but nice vid.
mower26 3 years ago
Well done!
99minerkc 3 years ago
thats pointless now use need another moter on the compreesor that pushes the air in that would is air moving engine parts.
freedomtagard 3 years ago
Many people know what a cam shaft is, and what modifing it means.
D342DIESEL 3 years ago
not the people in my physics class, which is what the video was made for. thanks for the thumbs up though.
MXmaniac237 2 years ago
If you think about it, Its really an air compressor backwords
mortie806 3 years ago
yep, i call it a decompressor.
MXmaniac237 2 years ago
BEAUTIFUL Job! *One of the most worthwhile clips on here!
Proud of you guys!! 50 stars!!
ilovemthtrains 3 years ago