Valveless Thermojet Pulse Jet Engine

[gabrieleyaris]

very god sound,like a v8

[BabuyKaKiller]

valveless pule jet

[BabuyKaKiller]

vlaveless pule rocket

[danne6a]

Do it fart? Lol

[Skinavish]

I find it interesting how the top comments on almost every pulsejet video is some sort of fart joke...

[colinclarke1000]

Just managed to find out what I wanted to know

[colinclarke1000]

Just out of curiosity...are these controllable once they are running? Ie is it possible to vary the amount of thrust once its ignited?

[neem2345]

@colinclarke1000 yes it is possible,you just have to vary the amount of fuel sent into the combustion chamber..They have got good throttling range..

[FVHGHK]

I do not get with q causes my engine to suck the air into the engine will termojet q may be the type of gas I'm using butane gas of cusine I do qq

have to be blowing air conprimido then it works fine but if he withdraw oar off please email me if you can help I'm from Brazil goiania goias

email salvadouglas@hotmail.com Soon I'll post the video

[bonzo9303204406]

it sounds like old soviet truck xD or maybe wankel engine

[jpdub45]

So if you could find a heatsink good enough as well as the right tank size, could this be, possible, not so much practical, to power a jetpack?

[rons22SandA]

You could build that was 3 or 4 time bigger that would definitely power a bike.

[josheskimo]

So this wouldn't even be able to power a bike?

[RahRahRaharu]

That sounds beautiful. If you have the ears of a gear head it sounds like pure indomitable power.

[gorillagirlgorilla]

Powerful but very inefficient!

Thats why they are not widely used.

[dreadnaught6399]

kind of sounds like a v8 at times

[BufteaGangsters]

U should use THAT instead of a vuvuzela... gee

[psycrotica]

And what can you do with it? fry your chicken?

Useless shitty item

[HALOFREAK9715]

@psycrotica actually it's pretty useful. you can attach it to a homeade remote controlled plane or car. so no, it's not a useless shitty item

[suitsconverse]

@psycrotica hilarious!! :)

[STEVEmurano]

if you can take the heat to make a vapor reaction with another technology, the days of vapor engines will come back... i think this is the way.

[missssterr]

High tech vuvuzela!

[rons22SandA]

@ajdeblaeij I got a CD from Beck-Technologies that has some formulas for sizing you engine. there are also some chatrooms that you can find that have a lot of people that are experimenting with pulse jet engines.

[rons22SandA]

@ajdeblaeij The thrust is dependant on the size of the engine. The larger the engine the greater the thrust.

All of the dimentions are interrelated. When you increase the size of the combustion chamber the length of the chamber increases by a proportional amount. This increases the diameter of the tailpipe (to allow the gases to excape). The length of the tailpipe increases to tune the whole system. Additional tuning is accomplished by flaring the tailpipe or cutting slots (vee's).

[rons22SandA]

@ajdeblaeij Thrust is dependant on the size of the engine. This engine is only about 30" long. I have plans for a larger model that will produce significantly more thrust.

[rons22SandA]

The engine is made from Stainless Steel. It's about 20ga.

[ohadqumpo]

what metal did u use

[EarthSK8]

''Do Not Touch''

[7777dmith7777]

It will take a much bigger one to move that trailer.

[SAHBfan]

Amazing!

I must check them out on ebeegeebay....

I'd love to have a go at making one, but alas I have no ability to work or weld stainless steel :-(

[C0ldFart]

dang, - what is the thrust

[rons22SandA]

Thrust is suposed to be 1 3/4 lb. I have a set up to measure it almost ready. I"ll post it when I measure it.

[jakksincorpse]

whats the point of this. are you getting any thrust at all?

[TheBattleWagon]

have you tryed wrapping the jet in themal header tape?

[rons22SandA]

Why would I want to do that? What do you think it would do?

[TheBattleWagon]

give it grater thermal effishancy,and cuase you to need less fuel per volume of superheated gasses expelled from it.

[alaskaracer]

@rons22SandA might help with effficiancy less heat loss

[superhornet59]

It would make the engine melt. It needs to be cooled somehow you know. You could attempt to change cooling from air (over the engine) to liquid (pipes, and then a layer of thermal wrap) but ultimately you still need some sort of radiator... the head just has to go somewhere. Ultimately, there's no point in adding complexity to a design praised for its simplicity.

[FTWMikeDero]

@TheBattleWagon i tried this, it works to keep heat in but i think the welds on the tube may be getting too hot. i dont want them to break.

[TheBattleWagon]

Mmm....How about ceramic coating it, like a header. can't cost to much same idea. higher temp cappasity.

[Ripika1]

That was cool I am planning making one but I need plans

[kirkmach32]

That sounds like about a e flat

[blastun]

im gonna try to make 1 of this soon ,and i may put a video to its gonna be cheap tough

[ostmash]

man that is so awesome! i want one so bad!

[silicon212]

It sounds like a cross between a killer bee, a V8 and someone snoring.

[karlzon]

@silicon212

Best description ever! LOL!

[ninja6kid]

is there any point to this or just for shits and giggles?

[Splooshiba]

they were used on v1s in world war 2

[prototype9000]

worlds longest fart

[joytech23]

By the way, are you controlling the thrust?

or are you just turning down how much fuel it gets?

[rons22SandA]

I control the thrust by controlling the amount of propane supplied. At the Idle point (when the engine is rumbling) there is some thrust (about 10 to 15%). As soon as the fuel is increased so the engine starts firing in its "Tuned" mode the thrust is about 50%. By controlling the propane flow I can vary the thrust from 50% to 100%.

[joytech23]

thanks, this is so interesting wow i want to make one!

[joytech23]

LOL I LOVE IT!!!

Sounds like someone trying to slurp a milkshake

[racelogic]

sounds like a v7 at low rpm! very responsive!!!! nice job

[trepxtrechi]

v7?

[racelogic]

hehe, sorry, v8!

[Thesentinel323]

how do they work

[wibcom]

hm.. what does this engine do? what is pulse jet?

[danielgosson]

This is the fastest pulsation ive heard yet. Which is more efficient, fast or slower pulsation?

[rons22SandA]

The pulse rate is totally dependant on the tail pipe length vs. the cumbustion chamber size. Larger engines pulse slower. Smaller engine are therefore faster (pulsing). The thrust is dependant on the output tube size and the amount of fuel consummed. Again, larger engines will have more thrust and smaller engines will have less thrust - but only because of the size.

[superhornet59]

smaller engines will always be less efficient because of the effect of the boundary layer will become more pronounced, until aspiration is not even possible. This becomes a bigger problem towards the smaller end of engine size. In large engines, this effect becomes negligible.

Fast pulsation is theoretically more efficient (except for the fact that it takes place in smaller engines), because it creates a higher pressure spike towards the front of the engine, burning that fuel more efficiently.

[DrumGod22]

I LOVE PULSE JETS!!!!!!!!

just saying.

[Rhodeni]

this sounds like chuck norris farting

[Ultimagnet]

chuck norris doesn't fart, because nothing gets away from chuck norris

[Fabscher19]

xDDD

[4sineweaver2]

best comment ever seen on youtube!

[huskydriver125]

i will built a pluse jet!

[Burntrubber87]

Wow..sounds like a piston motor when it "idling" pretty cool

[vic70cent]

thas a alien tenologi ,,lol

[deaftodd]

if it was then it would be way more efficient

[rons22SandA]

It is a Jet engine. Small but never the less functioning. Could be use to power an R/C airplane.

[rons22SandA]

It should have between 2 and 5 pounds of thrust. I have a spring scale with a drawer slide roller and will measure it some time.

[355000]

what the hell is it then, can you tell me?

[cookman283]

What sorta of thrust do ya get out of it? Any idea?

[vwchaefer87]

is that a new kind of organ? smile

[rons22SandA]

About 20 inches long

[shloop4]

im loving the sound of that thing

how big is it?

[strongasironman]

you should try to attatch it to an RC car and see how fast you can go

[diramonsky]

So what can you use it for?

[rons22SandA]

For the cost it was a great addition to my collection. I have never minded paying someone for their skill and ability.

[joshbobak2]

why would you buy something like that

[s04r3r]

Sounds like a V8 when it idles... 0.o

[rons22SandA]

Thanks

[crabbulator]

another cinematographic masterpiece. please produce more of these great art pieces. make sure the camera only shows one awesome angle, and make sure the subject stays put too.

if only all movies were this good.

[ribhkum]

nice sarcasm , bad grammer," cinematic masterpiece"

[pimpnprofits]

u r a loser

[MHSRULES12]

is there an issue with structural soundness because that steel is getting HOT!!!

[gaelen123]

Do you know the pipe dimentions?

[rons22SandA]

I bought it on Ebay. It was about $100 and the fuel system was $15.00 more.

[KrazyHorse805]

you lost cash, brougham...

[JohnF30Music]

how much did you buy it for?

[hhohydrogen]

man thats just useless

[mountianbiker777]

at the start it sounds like a huge fart/ truck :P

[rons22SandA]

There is no valve in this engine. The "pulse" happens through the "tuning" of the intake and the exhaust tubes (both length and diameter) and their relationship to the size (diameter and volume) of the combustion chamber.

[SVAFnemesis]

what does Valveless mean? this pulse jet doesn't have a valve?

[ribhkum]

valve-less , less a valve!

[sioc88]

super tight fart machine

[tylerakawings]

rofl

[rons22SandA]

The concept is the same. The differences are: The V1 "Buzz Bomb" was a valved pulse jet engine (Argus pattern) operational time was about 3 hours before the valves needed replacing. My engine is a "Valveless" pulse jet engine and as such has no moving parts.

[tigerfiresurf]

Cool jet.

Is this based on the same idea as the V1 rocket from the second world war & What differences are there?? Thanks.

[rcfreak2493]

did u get that one off ebay??

[filtrete867]

Sounds like a regular piston engine when off the sweet spot

[juandneen1]

love the alfoil on the block to stop it from blackening from the heat

[rons22SandA]

It's not sold, but I don't want to sell it. You can buy one on Ebay just like I did. If you can't find it, email me rons22@aol(dot)com and I will send you a link.

[bmxride210]

is this sold if aint can i buy it off you

[Girlygirl4110]

i liked this video :)

i cant watch this video Dp

[NKVSKI]

фигня

[rons22SandA]

The thrust of my engine is between 2 and 3 pounds.

[jonathanhucke]

about how much thrust do you get from this?

[Ross542]

how can i find how to make 1, i want to make like 3 and strap them to a rc plane:P

[rons22SandA]

It is a small engine. Some have been used to propel R/C airplanes. I just like engines.

[kodybob]

that cool and all but im lost what do you use it for

[SupaSexySnake287]

annoying neighbors :)

[Powniiiiii]

now i finished it ! my Thermojet is complete !I think i will run my thermojet tomorrow ^^ !

But i'm a little bit afraid of a flashback into the gastank .... do you have any safety installations or is it save ?!

[chemicallust77]

put a check valve in the fuel line

[Marco112390]

did you use a 20lb tank or 1 pound? Im trying to use a 1 pound but i cant find an adapter that spits out enough gas! torch heads wont do :(

[rons22SandA]

Butane gas is almost the same as propane. I would use it if I had it. The only thing you would have to concerned about is the jet size.

[Ross542]

propane burns faster also i think and alot hotter

[Powniiiiii]

Nice Thermojet ! I also want to built one ... got the materials at home .... but i have only Butan-gas ....is it possible to run the Thermojet on Butan or is it dangerous ?

[windoes98se]

is it running on propain?

[rons22SandA]

Yes, I have a 5 gallon propane bottle just out of sight.

[wizzer1313]

i mean of them lol

[wizzer1313]

you could have a good time pissing off your neighbours with 1 on them :)

[Keithmintagenew]

lol am going try make one out of beer cans :P

[CyanideXCloud]

That is OK, but does it make TOAST?!?!? Mine does...

[cornflaker]

WOOOO!!!! TOAST!!! I think we all know whos is better :D

[shinofreak011]

so if you have a pukle jetengine then how do you get a cart to move with it? Does the engine just push it 0or something?

[rons22SandA]

The engine has thrust out the tail pipe. It just pushes.

[shinofreak011]

so your saying if i built a jet engine and mounted it on a cart with wheels, once the engine starts it would push the cart forward. And anyway where does everyone get the hunk of metal? Do you forge it yourself like smelting? how would i get the metal casted?

[rons22SandA]

Yes. It would push your cart. This engine is built using sheet metal spot welded together. Some of the parts (the intakes) are tubing.

[shinofreak011]

so where could i get the metal should i go to a hardware store and ask if they can mold the metal for me? I really would like to get a pulse jet engine, i highly appreciate the fact that ur replying to my comments but how should i get everything and all supplies, because i understand the combustion zone of the jet engine is where all the action takes place.

[rons22SandA]

You should get a set of plans. There are some free plans on the internet (Brck Technologies has a free plan and some design tools to scale it for your needs). A sheet metal shop will sell you metal and could bend it and even weld it if you can't do that yourself. I bought my engine already made (on Ebay). It's a small engine so it wouldn't push a go kart. You would need a minimum of 20 pound thrust and 50 pounds would be better.

[shinofreak011]

now how exactly could i connect the propane to the combustion chamber? And the spark plug?

[rons22SandA]

If you notice - on my engine there are 2 tubes that go into the intakes. Those are tube that supply the propane - there are jets that that control the flow. I don't have a spark plug - my engine is started by lighting one of the intakes with a propane torch - I have used a match.

[shinofreak011]

so why did u buy this off ebay? what are you going to do with this big engine? And how much do you think it would cost to craft this engine?

[rons22SandA]

my engine is small - 20" long and about 3 pounds of thrust. I read about the Thremojet engine and wanted one. I bought the material for an engine that would be about 2o pounds of thrust. I bought the material at a scrap yard - mostly stainless steel tubing for about $5.00. I will eventually build the engine.

[simplegr33n420]

sounds like a big V8 when it idles.

[Elitehacker07]

love the starting idleing sound. nice video, doesnt look hard to make either?

[battlescared456]

What kind of metal is that made of ?

[rons22SandA]

The engine is made of stainless steel, spot welded together. Other engines have been made of sheet steel (non-stainless) but it will discolor more and will rust.

[battlescared456]

ok thanks

[battlescared456]

What kind of metal is that made of ?

[piromaniac545]

hook that onto a scooter

[Stephenlee5]

Sounds like a fart LOL

[tommycp29]

i want to have one of these in my room in winter ha ha JK too loud

[dabuttwipes123]

in the beging i thought it was a camaro its like my camaro in the beging

[RatkoUSA]

Sounds like a fart jet engine.

[notogas]

Interesting, is there any thrust?

[rons22SandA]

I haven't measured it but based on calculations it's between 2 and 3 pounds of thrust

[ramawson]

sounds like a car at idle

[terminusest0]

when the gas is turned a little down like on 1:20 it sounds more like a V1 bomb to me

[HelmerRamone]

V1 had a pulsejetengine

[softairsld]

i know

(my new account, old was terminusest0)

[Yunneck]

rons22SandA, could you buy one for me? how much it cost? please reply

[taofledermaus]

This will be powering our cars in the future!

Or make a nice cigarette lighter for them.

[JOCKATEO]

well if it breaks you can still use it as bong

[saleall]

this is horrible, it turns to a very noisy horn after a while lol

[w5cdt]

Cool...I'd like to point that sucker in the general direction of my neighbor's barking dog. :-)

[bullit123456789]

lmao

[Jangle2007]

Do you have any idea how much thrust you are producing?

[rons22SandA]

Some where between 3 and 4 pounds. I am building a device to measure it. I will post it when I get it dome.

[Jangle2007]

I look forward to reading those posts.

[golem72002]

cool, but when this sad themro I meant it used heat & no fuel :/ oh well.

[twojaythomo]

what makes for thrust is it the combustion camber or something more

[rons22SandA]

The combustion of the fuel (with the air drawn in) blows out the tail pipe (and a little out the intakes) to produce thrust.

[twojaythomo]

sorry let me ask that question again is a larger combustion chamber make more thrust or is it the size of the tail pipe outlet that makes more thrust

[rons22SandA]

The overall size of the engine is what makes more or less thrust. A larger engine (larger combustion chamber AND tailpipe will produce more thrust). The sizes are relative to each other i.e.: a larger combustion chamber with the same size tailpipe will not nessessarily produce more thrust - in fact may not run as well and maybe not at all. Beck has a formula you can download that will show you what sizes to use based on the thrust you want.

[twojaythomo]

where do you get the formula from and by the way i love the sound of this pulse jet it sounds cool when you back the fuel off to a slow pulse

[twojaythomo]

can you run a liquid fuel like kero in this and if so do you need a pump to pump the fuel through

[rons22SandA]

I haven't tested it yet but the suction at the intakes should draw any liguid fuel through a venturi once it's started and running on propane.

[oididdidi]

It might be o.k. for a gas boiler or something.

Don't pulse jets produce thrust?

[rons22SandA]

They do. This one has between 3 and 4 pounds of thrust.

[purkitron]

I love the idling, im getting mine, the exact same soon, where is the sweet spot? how many PSI?

[rons22SandA]

I only measure the pressure of the tank. I have a needle valve that controlls the flow to the #60 jets. The "Sweet Spot" is something I hear. If you listen you can hear it in the running of my engine.

[randomguy9898]

LOL sounds like a long burp=D then like your tv broke and had the multi color screen.

[coldasiice]

Im sure it attracked every horny male goose from miles around

[josh817]

XD Truely.

[corri303]

looooooool

[fronkenpoop]

Awesome.

[TViRuSX900]

LAWL

[tamias6]

I'd hate like hell to be your next door neighbor when you fire that thing up.

[RUsniper]

touch it!

[Conquistador19]

I could volunteer if you can treat 3rd degree burns ;P

[RUsniper]

nope i cant