small valveless pulsejet

This is a miniature valveless pulsejet running on acetylene, at last it runs at 1200 HZ!.
In the end its only 125 millimeter long inside.
It is not the smallest one, I now there are smaller ones running on hydrogen.
Maybe this is the smallest one on video.

[@wrxsavvy]

WAIT! ALL THESE YEARS IVE BEEN MARRIED TO A PULSEJET AND I DIDNT EVEN KNOW IT!

[@dtiydr]

Make it so small that the sound it produce is over our hearing frequency, that would be cool. Some grams of force but not a single sound.

[@videorowtv5198]

Then put like 10 of them on miniature rc plane and you got a spy plane

[@dtiydr]

@@videorowtv5198 True that.

[@aleisterlavey9716]

@@videorowtv5198 pffft... Rc plane. Make a drone with it, so they can hover stationary. Hm... or why not make a flying saucer with these

[@videorowtv5198]

@@aleisterlavey9716 Because flying saucers are unstable even with turbojets which have constant output. how the hell would you wanna make that with pulse jets. Why do you even need the thing to hover? It takes like 8 times more fuel.

[@aleisterlavey9716]

@@videorowtv5198 hmm... can we bribe Physics, for it to work?

[@kattemissen]

Incredible! soo small and so high frequency

[@stephenfitton5516]

Thanks for your video it showed up a lot of faults with pulse jets but it also provided a lot of answeres. I have machined up a version that takes advantage of the wasted heat,in doing so, heats incomming gases while cooling the motor internals, this should also reduce. decibels to a tolerable level. The intake speed is also increased without moving parts to 1to3 times exhaust gas speed. Internal design prevents the oscillating gas from making an exit other than Exhaust! adding efficiency

[@iPeel]

Bring on the pulsejet orchestra!

[@skyprop]

Sounds Like a Titan Engine starting up

[@ramairgto72]

Man I can only hope that vise is tight.

[@zach5994]

What would the ratio be between the size of the combustion chamber and the size of the exhaust pipe be, and the ratio between the combustion chamber and the intake pipe be?

[@GodlyNoghri]

The size and frequency are intriguing, but what about thrust? Can we get some thrust measurements?

[@drhunter1117]

KZbin 2020 : lets recommend this to everyone

[@RHBTurbochargers]

my weird ass actually searched for this

[@YaelLorenzo]

What is the blue cloud you can see on the gas tube (upper part)

[@leokimvideo]

I love these, they would really piss the neighbours off

[@Bark777]

aw, so cute...

[@munchgaming4589]

How much grams is the. Trust of the engine?

[@racedriver52]

Hi I want to do one of these for a science fair project, I was wondering what did you use for fuel, and what did you hook your spark plug up to for power?

[@thomasponsonby2024]

now this would make a great hover

[@toakreon]

The interesting question would be what levels of thrust were you getting from it. The fact that it runs at 1200 Hz is neither here not there if it only produces the thrust of a sneezing gerbil.

[@maxneu]

chillin out max and relaxin out cool

[@ramairgto72]

This project is very cool anyhow! I would like to see a Hydrogen Peroxide engine like the old military torpedos.

[@su27forserbia]

super video!

[@13bROT8N]

i want to make one but how do you get the spark plug to spark?? can neone help

[@MasterChef-ux3gk]

do you have the design/plans for it still? I know this video is really old, but I think its extremely cool :) I want to try and replicate something similar lol

[@sassobasso]

Did you made it? i want to replicate it

[@BrentRF]

Do you have the measurements? I've built large ones but would like to make a much smaller version. - Thanks!

[@rimar2000]

What if you make it WITHOUT intake tube? I say the intake be the exhaust tube. Pardon mi poor English.

[@PavelCherepnin]

Please tell me. For gas do you need any atomizer or injector inside the engine? Or just a regular pipe takes the gas?

[@Hunter-ku6ku]

+Павел Черепнин acetylene is in a liquid state but when it touches air it turns to a gas its sorta like propane, so you dont need an atomizer just a inlet

[@PavelCherepnin]

+Hunter Thank you, so I can just put the tube inside the combustion chamber and feeding the gas through it?

[@Hunter-ku6ku]

Павел Черепнин I'm pretty sure

[@user-ci4lv8cv1e]

ح

[@jangisgand6140]

Hunter In a tank, acteylene is not it in its liquid state. In fact, it is dissolved in acetone.

[@Netbug]

They generally don't generate much thrust despite the noise; They aren't very efficient... but I wish they measured it because I'm curious too.

[@TheKillgore521]

How did you make the sparkplug fire by hand ?

[@laskalives]

do you have a link to a video that shows how you can make this?

[@joemamma61]

How do you know the frequency that it is resonating at?

[@Garrethwr]

what did you use to spark the spark plug?

[@johnshepherd2011]

how much thrust does the engine produce?

[@dandil]

tell me, os the intake bigger or smaller in diameter than the thrust pipe?

[@abegooshti]

is that flame coming out of the intake pipe where the gas goes in? and if yes, isn't that dangerous?

[@TopGunMan]

Woah hey same here. I would really like to meet someone with the same plans!

[@tiellaviera6858]

can you build me one(valveless pulsed engine and how much?

[@swyntopia]

Does it produce any thrust ????

[@brodie1709]

how much power would this have? like in pounds of push?

[@carlthornton3076]

Very Good!...

[@Cybrludite]

So, how much thrust does this produce?

[@natedognate616]

Its a wierd process but surorisingly simple. Once you light the fuel and air it expands down the tube, decreasig the pressure in the combustion chamber. Then when the gasses are expelled out of the tube, air is rapidly sucked back into the chamber and the residual heat re-ignites it. All this happening over a 1000 times a second

[@ShootBlueHelmets]

Awesome! Now you just need a smaller, lighter spark plug and a titanium tube. You would have a hell of a thrust to weight ratio.

[@wlogan0204]

why arent these available to buy online for under $50

[@tevalia]

propane powered fire whistle

[@marcwolf60]

what thrust has it?

[@petegroover]

clever,so the right frequency sets it off ? hows it work ?

[@nevillecreativitymentor]

Whats the THRUST at 125mm?

[@BaileyEvans]

how much propain are you using?

[@mitropoulosilias]

thrust?

[@panwarhappy9368]

Producing thrust?

[@s28400]

Very cool indeed

[@carpetmonk]

do you run air into it constantly? could you use a fan for compression? i guess you dont have an idea of thrust in lbs eh?

[@timmygoffin007]

Wow! Cute little design! How much thrust?

[@clake10000]

How are you measuring the frequency? PS I am too lazy to read all the comments.

[@superman53144]

is a generic grill ignitor you can find them at menards

[@pugs2300]

i have the same question but id like to follow it up with what the hell is the point in everyone building these things....what the hell are you gonna do with em....or are you just buildin them to have something to do...i want one and dont know why..

[@GuyPyro87]

Sweet! A pulsejet Hair dryer, lol!

[@hapanjuuri]

Someone should make a pulse jet organ. But how to make it start instantly when a key is pressed?

[@SthealthRaider]

mig welded?

[@thelonewolf267]

holy hell thats loud!!!

[@ifocoeurdesir1111]

what is the smallest valveless engine that you think i can manage to run on propane. I need a very small engine to power a rotary rectifier for public demonstrations. If you can provide length and inside diameter, that would be awesome. I need one with front intake.

[@carbon1255]

+ifocoeur desir well I imagine the jam jar design is the smallest and simplest. Also no valveless jet engine has a front intake, all holes provide thrust. Valveless are also inappropriate for providing rotary power, basically useless in that regard.

[@acdcman50]

Did you used va?

[@Feuervogel666]

@13bROT8N With an ignition coil, an condensator , 12 Volt Batery and an switch. Everytime you open the circuit it makes an spark.

[@ariel11020]

hola y para que sirve esto. no comprendo . saludos ... argentina..

[@wackokicker]

my dentist has one of this

[@nitrojoe9]

did you shorten the intake and exhaust?

[@fastacker2]

Also possibly from, a tach on the spark

[@tomterahedrob]

cool!how much thrust?

[@slopedarmor]

they can create some useful thrust, the german v1 flying bomb was powered by an pulsejet.

[@SARRTOGeronimo551]

The self evident genius of this palm sized pulse jet is found in Santilli H+H+CO stochiometric carbon arc rod plasma generated fuel requiring water, immersed carbon arc rods, and 36v DC 40-50 amps. This elegant Solid State jet should be used in near closed-loop (having only fuel/air intake) Heat Pump, Powerplant, HVAC, Blast Furnace. Energy, steam, diamonds/rubies/saphires, diodes, hot water, anyone ?

[@starless2112]

why would you set up the camera then stand in front of it?

[@eru619]

noisy torch.. you neighbors like you every time you turn that thing on :P

[@robertjanbout1437]

How much thrust can It give?

[@Xost1425637]

non

[@Xost1425637]

few oz maybe 3

[@schlusselmensch]

Sounds like you're beating a dachshund to death!

[@Jerrycobra]

that a hella high pitch pulse jet

[@jttech44]

ha, it sounds like a die grinder you should power an rc car with it

[@TFWS6]

I like the biological ignition system!

[@nadir6661]

good ! but now can they hear a whistling train coming at six feet away?

[@rEdf196]

strap a pair of these on my skate board

[@LtSpiteful]

Secondary exhaust I think. It's valveless, so it uses an "aerodynamic valve", a u bend as an intake. So thrust essentially comes out of 2 pipes. That's my take at least. Any other suggestions?

[@fodbirdy]

I'm from west Philadelphia, born and raised

[@bobmouseable]

there is a type of pulse jet exactly like you say lol

[@castlemania08]

@ 1200hz thats a noisy little bugger!

[@soccrsnipe]

1.21 GIGAWATTS!!!

[@euklid216]

@elchicoboy looks? :D

[@superjezz]

WTF? I cant watch it has it been deleted?

[@SimonKobras]

jeah the GAS bottles on the Right :DDD

[@mannequinfukr]

(when the guy in the blue was in fron to the engine) with its screaming it sounds like the guy in the blue is passing wind (farted)

[@natedognate616]

You can see the spark plug through the meatl! YO

[@mageac]

its an engine, although it would be used in missles i would think....

[@niktesla519]

Very interesting. The pulsecombustion.com website in the video appears to be gone.

[@100PercentJoseph]

by any chance, do you have any rc cars? if u do, that + 1 + a video lots of people would probably watch.

[@khalilmecanicien8457]

سلام عليكم هل يمكن أن تعلمني كيف اصنع مثلوا

[@elchicoboy]

@euklid216 lol exactly!

[@bellidoify]

Sound like a Aedes Aegypti

[@anonarob]

if it has enough thrust you should rc it on something.e.g. pland,car....etc....

[@FelixTheHouseFreak]

to go death? Do you mean deaf? Or do you mean to die?

[@hammerheaddon]

dont understand.. why he should block our sight/

[@user-no5fu5wv4f]

Паяльная лампа?...так она уже 100 лет назад придумана была...

[@morganhv]

that's cool, can you send me the dementions

[@fastacker2]

Sparks.