10 Lb Thermojet Valveless Pulse Jet Engine

[Shockszzbyyous]

Why does it get red hot?

[eezy1972]

But what can you use it for?

[DynaDuctINC]

How did you make it valveless? I always thought pulse jets of that style need a valve. I've always seen valveless in a J shape.

[FPSArizona]

That's pretty neat.

[DynaDuctINC]

Now to figure out a way to stop the combustion chamber from melting

[125varma]

could you guess how much is the speed of the wind exiting the exhaust? I'm working on a project and I need to know the proximate wind speed generated by almost this size of engine :)

[Cwafter]

I dare you to poke the combustion chamber with your dick

[trailkeeper]

Maby some injected substances like water or water vapor could boost the thrust ability.

[TheHitman19957]

But will it blend?

[fubleduck]

I assume 10# is the jet's weight. What's the thrust?

[MaurycyF]

Look at grass behind



[bluttertifi]

I'm quite new to this, how does this work excactly, or simply :P

[Celis215]

@bluttertifi see the orange hose? that's where the gasoline,kerosene, etc. flows. And see where the orange hose is connected to? the two silver pipes? yeah, its connected to the double airflow chamber.The biggest tank you see there connected to the engine is the Combustion Chamber,all the propellant goes there together with the air sucked into the chamber to make it a one way circulation.Leaving all the pressure to the main exhaust.

[Sharkformer]

oh cool it has a little light on the back :) OH FUCK THATS WHITE-HOT METAL D:

[summerdude600]

what about running this off of and in conjunction with woodgas

[vonzace]

look at all that ENERGY, being wasted in the form of HEAT instead of PROPULSION.

[BeckTechnologies]

@vonzace Look at the ENERGY being wasted commenting on misunderstood thermodynamic principles.

[thegoprovideos]

people are so dumb and don't know how they work..... basically every comment......

[mrvilamiu02]

Segurança NOTA 10 pra esse cara pqp...

This guy think Safety certainly ò.Ó

[FarginBastiges]

The guy speaking sounds just like Michael Stipe of R.E.M.

[davepaula123]

i think that's a glorified shop heater.......be careful and enjoy yourself... dave.

[Me102288]

so it doesnt self start, you need a battery to heat a glow plug first.. :-)

[Planninonit1]

great idea having a rubber fuel line and gas bottles right beside a glowing red tube of fire!

[BCQD4]

so WHERE IS THE AIR INTAKE??????

[Spaceman002]

pulsejet engine....check

propane fuel tanks....check

12 volt battery check....

idiot running a PULSEJET...RED HOT STAINLESS STEEL COMBUSTION CHAMBER NEXT TO A CRAP TON OF UNPROTECTED FUEL....check

[jayanthyk]

@ 1:22 how come the camera isn't melting

[mindprism]

So if you want to heat something up really fast, and make a lot of noise while you do so, this is the technology for you ;)

[jag9998]

ah, pulsejets...

[offom]

Please, can you help us about Pulse-jet Ignition System ?

[flahr1]

Um you might have heat issues with an rc plane.

[12inchpianists]

lol i was waiting for the gas containers RIGHT NEXT to the glowing hot end of the jet to explode or something

[anton854]

Is there any compression of air before it enters the combustion chamber pulsejets?

if so how is it compressed ?

[FVHGHK]

Help! built myself a ThermoJet he does not suck the air gotta keep compressed air blowing in dult input when he cut off the air conprimido I detail what I'm using butane gas (coal gas will cusine q of the gas may be some tips there guys

[MrSoldier646]

im building a RC jet that uses this desgin but i have a problem with heat glowing red metal seems to catch my plane on fire and melt the wites i need ideas on heat sinks or a cooler burning fuel

[andytheweb]

Your vice will no longer have its temper ;)

[RoyalDragonusa]

Interesting. How much weight can it move? say we put one on the back of a Kid's wagon. How fast would it go? What about a common Go Kart?

Also, is it smart to have your fuel tank infront of it?What it it breaks loose from it's mount and rams your Propane as it fly's off?

[josheskimo]

This is amazing how much would you charge me to build one and sell it to me?

[cacneaunit6]

If u tell me where the air intake is il subscibe

[MonkeyWithAWrench]

@cacneaunit6 the two short tubes on the side. NOW SUBSCRIBE!!!!!!!!!!!!!!!!!!

[Kpilot786457]

that is HOT! that turned RED and YELLOW! wow thats hot that would burn...........

[wojtaszek645]

czy ty myslisz co robisz ,

[Themayseffect]

i dont know much about the abilities of mixing gases but there seems to be an argument over using methanol or kerosine. is it possible or has anyone tried mixing the 2 to creating a different type of burning process? more of a curious question.

[BeckTechnologies]

@Themayseffect Pulsejets will run on almost anything that burns, but if you deal with them on a daily basis, you'd probably go with propane too, since you dont come home every night stinking of kerosene. Methanol mixed with hydrocarbon fuels produce very good results. Hydrocarbons will burn significantly cleaner with methanol mixed in.

[Themayseffect]

@BeckTechnologies yea that i know. so what about nitromethane and alcohol. ive never seen those fuels used in turbines or pulsejets/dynajets

[BeckTechnologies]

@Themayseffect methanol - nitromethane fuel is the standard, and only allowed fuel in competition pulsejet speed flying events.

[Themayseffect]

@BeckTechnologies makes sense. but how big is the power increase compared to methanol or kerosene?

[turnstray]

Would it be possible for you to send me these plans or dimensions or a link to them? Cool project. Thanks!

[DevilMaster]

Just out of curiosity, have you ever tried to measure its loudness with a sound level meter?

[BigAnt737]

Wouldnt a conical exaust nozzle and augumenter at the rear increase thrust to about 15 - 18 lb? just a thought

[JTsmokingbaby]

I would lol if it burnt the lens

[TheGoodInventor]

hey you just burn our eyes

[ken0is0gay0fan0club]

why dont you dissconnect your starter?

[josephlwu1]

where do you get one of these?

[Crashboy1024]

Are you crazy? Putting a red hot impulse jet that can blow any second right beside some gas cannisters?! Geez!

[ken0is0gay0fan0club]

@Crashboy1024 it realy cant explode the pressure is from already burned fuel if it sprunk a leak it would lose all perpulsion its safe

[Felixificus]

looks yummy

[darkhorse1112]

would it be posible to convert it to water cooled with a radiator pump system to get more power?

also maybe water injection also mybe help with density and cool off, just an idea please let me know im very curious

[thelinkonpark]

THAT LOOKS HOT!

[thagonzp]

dude put your freaking water mark closer to the bottom of your videos it gets in the way

[punisher17011990]

i just dont get it...is the engine (once its fired) sucking air through that two little tube´s? and than exhaust the hot air more through the maintube than through the little ones?

[mattyboi678]

Oh thats clever sticking your face/camera right in front of the exhaust =/ Just begs for a malfunction to happen...

[hd1986fxrt]

That place looks like it's ready to blow up like a meth lab!

[bulloramone]

Great video! amazing how the combustion chambers lights up!

[Newbpwng]

jeez it got hot did u try to measure the temperature with temp gun ??? bet l=its like 1000F

[MrKawiman94]

loud as shit huh? ive seen a few things similar to this

[fookingsoc]

...doesn't seem too smart to have that engine with the fuel tank directly in front of it...what if it were to slip out and fly into the fuel tank....KABOOM?!?!

[elisheff]

Nice run!

It uses the same principals of the V1 rocket ?

[InnerSilence123]

thats an engine or a lightbulb??

[rockergod789]

sounds like a swarm of REALLY angry bees.

[gasflame62]

Great way to light up the way.

[robnox]

yea if the clamp loosened it would fly into the propane tank. boom

[pipzipcip2000]

Hy,

I plan to build such an engine myself-valveless...and I had a few ideas of how to improve it!What's do you think about:

1. A ceramic (or asbestos?) coating inside the combustion chamber. It would protect the outer metal shell and it would increase the combustion temperature thus increasing the fuel efficiency and power?

2. A turbo, powered by some exhaust that would in turn send compressed air into the intake?

3. Linking 2 eng. in a series? exhaust to intake.

Thanx, Alex C

[tc05698]

#2 is definitely a bad idea, as pulse jets work on the principle of pulses which causes a fair amount of turbulance and vibrations that a turbo is not used to and it would thus break quickly.

@pipzipcip2000

[osht1]

@pipzipcip2000

#1: No idea.

#2: Already discussed

#3: Not going to work out for you. The exhaust is... well, exhaust. The exhaust won't support combustion in a second engine due to its oxygen deficiency.

[DoNotuseEbid]

does the build have to be precise? have you any plans?

[hangoutsumtime]

is that a larger engine the the left corner at 1:23?

[CykoNL]

Say I want to annoy the neighbours, how much dB does this (roughly) produce?

[Zvesda]

@CykoNL

a lot.

[computersales]

Are there any good videos that explain how these work?

[69ballsmahoney]

who the fuck actually uses these things

[vietanmay911]

umm can it run on 50% isopropyl alcohol

[DoNotuseEbid]

does it have to be precise? have you any plans?

[lithium803]

I want one.

[soverato3]

can it propells a model plane

[1littlelee]

yes it can

[mikelwhitlock]

probably, but your plane would light on fire

[Mike20151]

thats bad,i can't make one but thanks for telling me

[Mike20151]

can you please tell me where did you get the parts of that engine?

[BeckTechnologies]

Unfortunately you cant just buy parts for pulsejets, we make all the parts from flat sheet metal and roll them and weld them up.

We also offer partially completed engine kits with all the materials you need, and most parts rough cut / formed

[jmaxwells]

is that a helmet cam?!?

[pr3typ0ny]

how would you trasmit this to movement

[BeckTechnologies]

If it wasnt bolted down it would fly off... Just need to stick it on something.

[EnglishTurbines]

@BeckTechnologies 1. Put it in a plane to demo it. (ie fly it)

2.Show how you propose to carry liquid Propane in the plane (and control flow rate)

3. Show the engine on a test rig doing 1lb up to 10lbs thrust.

4..Demonstrate thust to weight ratio.

[EnglishTurbines]

@BeckTechnologies 5. Whilst the ease of starting is excelent, I have my doubts about the trhust claims, Does not look like enough air mass flow to do 10lbs thrust to me.

6. As you may have guessed, Im an engineer, and have made my own Turbojet for about 500USD...13lbs thrust @ 160K...see my Link.

[BeckTechnologies]

@EnglishTurbines

That particular video was running on a nearly empty, cold tank, so it was not at max throttle. At max throttle it is much more like the videos of the 4lb thrust engine, with distinctive shock wave pattern in the exhaust. The engine will put out approx 14 lbs on liquid fuel like methanol, you dont fly with propane. Propane is simply a clean easy no mess no fuss fuel for ground tests and demos. You dont go home smelling like kerosene at the end of the day.

[EnglishTurbines]

@BeckTechnologies Methanol eh?..but Methanol has such a low calorific value, certainly lower than Kerosine for instance?

[BeckTechnologies]

@EnglishTurbines

The evaporative cooling from methanol results in a much higher fuel charge density, combined with its rapid burn speed, result in much more thrust output.

[EnglishTurbines]

@BeckTechnologies Do you have clip of one of your engines running on Methanol perhaps?

[DevilMaster]

@BeckTechnologies Why don't you make a video showing the performance difference of the same engine with different fuels?

[pr3typ0ny]

@BeckTechnologies yes, inertia

[Kukkaloota]

I was wondering that what's the radius of the chamber's back-panel?

[freesafe7]

god damn i almost threw up with the fancy camera work

[childsca]

Ugh, my luck the thing would blowup in my face on startup

[EumlOriginal]

times even the air trying to put into rotation? should bring more power

[gwarbo]

wolfe1970, not everything is intended for use on a model. check out the 700lb thrust pulse jet video, do you think that guy wanted to strap it to a model?

[wolfe1970]

i was waiting for the spark, propane tank & boooooommmmm, seriously though how would you fit that in a model with out it catching on fire

[ajawofcopan]

that things way too hot man, and way too close to the propane tank. I was waiting for molten globs of metal to go flying around like a pottery spinner thing of fire and death

[BeckTechnologies]

Its about 1000 degrees away from melting, you can hold your hand 6" away from the chamber just fine, the propane tank 4' away is actually chilled considerably by the evaporating propane.

[ajawofcopan]

@BeckTechnologies oh okay. Cool man. Hey how much thrust do you think it's putting out?

[pakvanjdam]

how much trust can you get ?

[TheStarDustGroup]

it would stink to trip on that thing!

way cool though how would you cool it liquid nitrogen

[SeverEnergia]

So is this for UAV's or what? :|

[ebenalart]

good job

[steve625c6]

Where can I find some simple blue prints to build an engine in simialar fashion to yours? Ive seen many variations of Pulse Jets and like the simplicity of your design.

[waldersson]

HEY!!! ITS A LAMP lol but that thing is shining!!

[Jboyd612]

How long can it run before it melts down?

I'd love to build one to fly here at my club. it would drive the old guys crazy. hehe

[nicholas9916]

so 14 lbs of thrust is enough to fly a model airplane?

[BeckTechnologies]

14 lbs is enough to fly a rather large air plane. 4 lbs of thrust will fly a 30-40" wingspan at over 200 mph.

[ioan21121221]

hey ive found a pulsejet calculator i think you made it, does it work for valveless pulsejets too?

[themainproblem]

Nicely done.

[izzarulz]

could you please send me blueprints on it?

[iNOVASODMG]

see when it gets red thats when u want to touch it :D

[shparker]

looks dangerous

[TimeLapseSteve]

Those birds sound excited.

[samsomiller]

wow that got hot very fast..

[user0118]

Is it 10lbs of thrust or does the engine weigh 10 lbs?

[BeckTechnologies]

10 lbs thrust, with a special mix of methanol and gasoline and a model turbine fuel pump One of these has put out around 14 lbs thrust on a RC setup.

[MultiHobbyman]

well i don't know how to make the cones or flares

[MultiHobbyman]

best pulse jet i have ever seen!

Is there any free plans for this anywere

[UCMS30Z]

Dude, it's four tubes and an end plate. It really isn't that hard to make one of these.

[BeckTechnologies]

Dimensions are rather important, cant just stick a bunch of tubes together and expect it to do anything other than burn fuel and make noise if it runs at all. With some engines altering the dimensions 1/8" can result in a 50% increase or decrease in thrust.

[spshecot]

Is it just trial and error in building these engines or you have to know and apply different formulas in sizing and dimensions?

Also can this particular model be run on liquid fuel?

Thanks

[thinkpad411]

Pulse jets have been known to run on anything from sawdust, coal dust, to diesel and petrol.

[noxagol]

Wrap it in some Kaowool/Inswool, ceramic wool that can stand up to 2800-3000 degrees F. Great insulator and will probably enhance efficiency as more energy is directed out of the exhaust and not radiated off as heat. I use it in my propane forge, 2" thick, and the steel shell only gets up to a few hundred degrees despite the inside behind bright yellow orange.

[noxagol]

Though, it might melt so it might not be that great of an idea.

[jacebigelow]

Is there a way to measure pressure within the combustion chamber ? I know it's oscilating between positive and negative pressure... but how great is the pos pressure ?

[BeckTechnologies]

The pressure changes rapidly, but you can measure the pressure with the right equipment, peak pressure is about 60 psi, the min pressure goes down to about 7 below atmospheric.

[RIO1987RUSgosu]

OMG its cool

[raunchbear]

come on everyone.  it didn't blow up

[triangletrexx]

If you put the gasbottle a little closer you will have a big party, trust me :-)

[BeckTechnologies]

With how good of an insulator stainless steel is, and how much propane cools when it expands out of vapor form, putting the engine directly against the propane tank would possibly just barely make up for how much the tank is cooled.

A few minutes of running will cause the tank to form ice on it, 28lbs of steel + 20 lbs of propane all cooled below freezing would take a lot of heat input to not only keep up with the cooling but cause it to over pressurize.

[descending19]

#1 I WANT TO HUG THE GLOWING RED PART RLLLLY BADLY

#2 that would be a really good way to fill up air balloons for my b-day (lol i jk)

[motofreak36]

Sounds like my rc car

[potplantpete420]

Really cool but dude the nim i seen the tank i was like this dude is going to blow him self up! pop

[BeckTechnologies]

^ check above comments

[PieLordPdRocks4]

Awsome but isint it a little dangerous next to the tank of fuel that could explode?

[BeckTechnologies]

No, propane burns, it cant explode in the tank. The only way to make a propane tank rupture ( most have safety release valves to avoid this) is to stick it in a fire and wait. It is going to take a lot of energy to heat up the 28 lb tank, and the 20 lbs of fuel inside it. If you sit around for the 2-5 minutes that a propane tank is sitting in flames then In my opinion you kind of deserve it. Though with the tank open, and gas flowing out, any fire would melt the rubber fuel line, and blow out.

[Weslo2]

wow, that is cool

but come on man, where's the common sense

propane tanks lying around within 3 feet from it

anything goes wrong and KA-BOOM

[pooperscooper71]

Whats the problem? When you weld with an oxy set you can be this close. Sure its not going to be mega safe but it is along the lines of having a gas bottle under a barbecue.

[BeckTechnologies]

Thanks for pointing this out, unfortunately the internet is full of uninformed people who think things explode like in the movies they watch, and thats the extent of their knowledge of the subject.

[sz42781]

Well Done, where could I get some dimentions for one of these? Do you sacrifice mutch thrust using valveless?

[BeckTechnologies]

Stainless is an extremely good insulator, you can hold your hand within 3" of the engine. Add to that the fact that propane expands and acts like a refrigerant, after a minute or two of running the propane tank can actually form ice on the tank. If you sit around and do nothing for the time it takes for the tank to heat up to the point where something bad can happen, you would have to be an idiot. Common sense is keeping something for putting out fires near by, no different from a BBQ grill.

[MurphDaSurf1956]

Yep, there's a genius for you! Right next to a compressed flamable gas cylinder . . .

[BeckTechnologies]

Compressed FLAMMABLE gas is in many ways far safer than cars carrying gasoline in their fuel tank. If you want to make a smart comment, go learn a thing or two about heat transfer, conductivity, and flammable materials.

[MurphDaSurf1956]

I was referring to how close you had the compressed gas cylinder to the open flame, shit-for-brains. Would you put the compressed gas auto fuel cylinder on top of the engine? You've been educated out of you common sense . . . SAFETY FIRST, MORON!

[BeckTechnologies]

The open flame is pointing in the opposite direction of the tank, Einstein, blowing at 600 mph, pulling cool air in from the direction of the tank.

Forklifts have their propane fuel tanks located above their engine, as well as motorcycles. Cars also have their exhaust pipes go directly under the gas tank.

Learn how to spell flammable and maybe I'll take your comments seriously, Troll.

[TheTurbinator]

That looks VERY safe.

[hessy11]

i would love to stick my brothers face on the glowing end

[corotor12345]

i would love to brake your nose...

[lexmoboy13]

u need to try to make a rocket out of it like have the fuel source attached and set it up right that bitch wood probaly fly

[ratgreen]

hey man could you message me some dimensions or plans by any chance, coz i love your jet and it looks nice and not to hard to make.

[LTF85199]

wow, that is sitting dangerously close to that propane tank.......

[milroxsox]

awesome video. you should make a tutorial on how to make one

[Jetijs]

Maybe this works better as an efficient heater :)

Anyway, great video!

[sciencoking]

cooooooooooooooooooooool goes into my favorites list

[quadcam24v]

does the construction have to be stainless steel? or will mild steel do?

[MonkeyWithAWrench]

mild will do, but it will deteriorate after a while. i built a small one with .060 thick mild steel and only ran it 7 times before it burned up. im trying to come up with a design that uses standard plumming parts so more people can make them.

[Stig22121]

If you put that in a plane, it eliminates the need for lights.

[D1rec7or]

if you stuck that up ur arse, it would eliminate fecal mater.

[Stig22121]

And anything south of your waist.

[kernalEugEnE]

and you

[chickenz666]

this video is great but i was wondering how you got it to be a valveless design without having it in a "U" shape. I have read that that is what takes the place of the valve. Also, where is it drawing air from? I dont see any intake pipes unless those two short pipes with the wires going into the combustion chamber also suck air?

[Powniiiiii]

Hi nice thermojet . I have a little question because i am building one at the moment and i have problems building a funnel to affiliate the burning chamber with the exhaust !! Would be nice if you have a plan or a simple construction for me !

[Powniiiiii]

....problem solved ... got it!

[gupnup]

What are the uses for these engines that you sell?

[jefbt]

WOW How can i make one?!

[fatboyslim27]

Does the small 4lb thermojet start by itself as well?

Are you still selling these?