Building A Gasoline Pulse Jet Engine

[@TheDrakenZ]

Now we wait for Colin Furze to comment :D

[@ShaunO1225]

I'm waiting for Integza to see this

[@E.L.M685]

Engine failure

[@brandenhoolehan7149]

I think there needs to be a race between integza, Colin, and this guy. Any fuel, any size pulse jet, any body type.

[@papakrakazyabrika]

Фёрз ребёнок в подобных двигателях 😂😂😂

[@khupan.ttikhir384]

​@@ShaunO1225 aaaa

[@barthanes1]

Cool project. Those things are loud. I've seen you do some dangerous stuff, but spraying atomized gasoline next to bare wires on a battery takes the cake.

[@AdsDem0n]

I held my breath on that clip

[@flomojo2u]

No joke, I've seen some reckless things in my time, but misting gasoline into the air while manually connecting/disconnecting the fuel pump wires to a battery a foot away is staggeringly dangerous. You are always going to get sparks connecting a motor to a battery, it's just a matter of how big.

[@tenlittleindians]

My guess is diesel fuel or kerosene and neither catch fire very easy.

[@tsarbmb]

yeah fr he could've just used water

[@duke1467]

We built these when I was a kid. The valve is much different but functions the same way. Thanks for bringing back such great memories.

[@AChicken-sh1gc]

tf kind of kid were u ? i mean im still a kid and did similar stuff but i never managed to get my hands on tools and material but still im surprised im not the only kid who did this

[@duke1467]

My family owned rental stores and had some amazing bikers working for us.They had some real skill when it came to repairing or making just about anything and they liked that a little kid wanted to learn. So I did.@@AChicken-sh1gc

[@mffthefrog1307]

@@AChicken-sh1gcProlly built a jam jar pulsejet

[@court2379]

I made two of these in highschool. That valve block is likely to melt being aluminum. ask me how I know... You may need to change the tube length as well to get the right resonance. Was it based off any existing plans, or just winging it?

[@AceNinja2112]

You are an amazing metal worker!!! Plus, your videography of the construction is highly entertaining and satisfying!

[@oomwat6101]

Best 'Established Titles' ad ever ... nicely done Sir.

[@posi_de]

Don't fall for their scam please...

[@GBWM_CNC]

Your machining skills and video editing are both just perfect. You do really inspire me!

[@Март-д1э]

Yes

[@jerrysanchez5453]

Most youtubers would have turned this into a 20 part video series.i respect it

[@cadenbecker2952]

awesome project just one concern is the compressed air hose for the fuel line which will swell with contact to gasoline, if the pump is under 20 psi (which it looks like). Normal fuel hose with work but an efi pump 200-300 psi will need efi fuel hose. Cant wait to see what this goes in

[@DanKoning777]

With pulse jet engines still being used today I can't wait to see this [or a modified version of this], on a future build of yours. According to my research, 70 to 100mph is the "norm to expected range" for these engines. Looking forward to seeing what the "Extreme" speed range is. 😁*Well done* and *God bless* as always.

[@nathankirby899]

I haven’t seen any of your videos in ages but I’m glad to see you back

[@owltube-4036]

18:30 I was surprised by the sensuous mold technique in this video. It's a great video.

[@kaosthecosmicreviewer1055]

another piece of expert craftsmanship gentlemen, well done. I assume there will be further refinements in the future.

[@gdfgfrd]

Looks great! You are a brave man if you are testing the jet engine while standing next to it without protective suite

[@mmccab]

Gotta love the part where you test the gas atomizer in the open room with the battery connection held by fingers. Apparently you assistant didn't arc the end of those wires with that gasoline mist in the air. The video may have been shorter, if so.

[@chriscorum2527]

It's to short. increase the length and add a short cone to the end. If a pulse jet is to short it won't fire at all. if it is to long it will run but not very well. Also you are correct in that your reed valves need to be spring steel.

[@harrysheppard3745]

@ 11:56 if that was gasoline you were lucky it didn't ignite from the spark caused from the battery terminals!

[@thepvporg]

You could have just used the body of the rocket to gassify the fuel and then combust it so that its a continual process, feed in the gas via a venturi intake to get around the issue of the reed valve. Look up Primus stoves and Tilley Lamps, they gassify kerosene that is then burnt to cook or lighting.

[@mbidesign4185]

Hello, that's a good idea, but the problem is that when the machine stops, the petrol continues to evaporate and can simply ignite itself on the glowing parts. Look at my jet engine, it works without any problems. Greetings from Germany.

[@JazzbLu]

FINALLY! Someone made a gasoline pulse jet! Thank you and totally awesome build!

[@Teresa_Almeida]

Hello! I am working on a gasoline pulse jet for my thesis! Can you tell me which nozzle you used for atomization? Thank you.

[@istvanpetocz4850]

A németek mérnökök micsoda zsenik voltak hogy ugyan azt a rezgőszelep megoldást használják még ma is és nem tudtak jobbat kitalálni.👍👍

[@malcolmcarter1726]

Wow! Good to see a master metalworker at work. So thats how pulse jets work, reed valves. Now put it on a home build aircraft and call it an Me 328 !

[@ChristopherFalletta-rh9jf]

You can literally make anything you want being a metal worker that’s amazing 🤩

[@SheenylHassan]

Robert Maddox and his kits are absolutely legendary

[@communismsuperhot9611]

Great idea to spray that fuel mist so close to those exposed wire powering the pump. No worries of spark or anything. Think more next time, I enjoy your channel to much to see it go over a simple thing.

[@b00573d]

@integza would love this!

[@BigBlueDog8]

What happens if you give it a bigger combustion chamber and larger air intake ? Do you get more thrust?

[@Sp00kq]

The key for pulse jets is too actually have only a trickle of air going into the intake. It's very likely that the larger intake will cause issues

[@brandenhoolehan7149]

Spring steel would have been a bit better like you noted at the end. Though I imagine you’d run into a few issues with that insomuch as you’d have to calculate the optimal air flow rate which I imagine could be resolved by using the 2q^2+q equals your max practical discharge rate which you’d then be able to use the optimal AFR to determine how much gas to inject and also therefore the optimal air flow rate given that pressure which would give you how much surface area the spring steel needs to open up to let air in.

[@johnsherborne3245]

Immediately after ww2 my father worked at the national gas turbine establishment at Farnborough. One of his colleagues had been part of the team interrogating the German V1 team. When asked as to what the vanes were made of, expecting some exotic alloy, the Answer was , Mild steel. Don’t be ridiculous says the English man. That wouldn’t last five minutes ! Ah, says the German gent, the journey only takes three minutes. Not quite true but point made.

[@Dave5843-d9m]

Walter Kaaden an engineer with Argus worked after the war for MZ (the original DKW factory). He was the first to achieve > 200bhp per litre from a piston engine. His knowledge of gas shock waves and harmonics at different gas pressures allowed him to invent the two stroke expansion chamber exhaust. That’s a static device that uses harmonic shock waves to supercharge the engine. His secrets were stolen by Suzuki when his race rider defected during a race.

[@damenekamel5063]

it was one of my dreams to do what you did absoluntely amazing well done my friend

[@Sp00kq]

Don't let them be dreams. Do it. None of this fancy equipment is required to make a functioning pulse jet. All you really need is a drill, used can of aerosol spray, metal pipe, and a fuel source. Im gonna make a basic one tomorrow morning

[@jarfmusic]

As an Aerospace engineer - I am curious because there seems to be hobbyists in the comments. Do you model your pulse jets beforehand in CFD of some sorts before you build them?

[@smokeandsteamxsw9831]

😅i love to watch a craftsman bring thoughts to life. Amazing!!!!!

[@EleanorPeterson]

Excellent! Although the ones Herr von Braun sent to us in London made a LOT more noise... 💥😁

[@garyweaver317]

Your valve stack is missing spacer plate between each reed valve. The German V1 has spacer plates. My engines run for several hours with no valve damage, I thought maybe the spacer plate prevent valves from bumping each other when engine are running but high speed video show valves flap in the wind like a flag. Maybe space plates create smoother air flow through the reed valves. Space plate .030 metal thickness works good.

[@lefteris-3E]

Καλό χειμώνα κοριοί. Και καλές πατέντες εύχομαι. Πάντα υγεία.

[@jeffflanagan2814]

Bring it back with the spring steel reeds!

[@TrakaBat]

Wow 👌 👏 that is awesome and I appreciate what you did with the insignia on the tail fins. Well done.

[@systemsrenegade9888]

People from London who lived through the 2nd world war would be shaking at the sound of that engine and waiting for the big boom at the end of it.

[@exmodeus]

I can't see the front part. Did you use an air bleed or can it self sustain?

[@leechowning2712]

From the shape before he zoomed in, what he built is actually a ramjet, so would need an airflow to work. So I am pretty sure would have a fan off camera.

[@rider68-12]

Ok I know you all make crazy inventions and rides. I am ready to see what you all put that on.

[@pietermuller8378]

Enjoyable to see such talent at work!

[@Jagdtyger2A]

Nice. How much thrust does it make?

[@BonesFPV]

Best bong ever dude.

[@Catrik]

Very cool build 👍Will you be making a new video with spring steel shims?

[@yodu45]

A V2??

[@Catrik]

@@yodu45 What? The engine is not running properly in the video, which is explained in the video captions. The used stainless steel instead of spring steels so the valves dont work properly.

[@yodu45]

@@Catrik I know, a V2 like a V2 rocket.....

[@devilsknight]

Quick question, what was the purpose of cutting the bottom off of the fuel cylinder? Was it just to make a larger volume? Seemed a waste of time, but im certainly no expert!!

[@bartboosman953]

Fun build! How much thrust did you achieve?

[@kukipett]

From what i have seen i guess none, he managed to make a fun flame thrower but the pulse jet did not pulse, a pulse jet make a huge sound at a frequency that depend on the lenght of the tubes, basically you get an explosion and a pressure wave that oscillates between the two end of the tube like an organ tube. It's just like a combustion engine but with an open cylinder. What we have seen in the end of the video is just a constant flame, it would make a nice heater with a very little thrust.

[@papakrakazyabrika]

You can add 250mm to the tail pipe and a diameter 10mm larger than this diameter.

[@z31drifterlf]

Did you do any CFD for the baffle design or can you point me in the correct direction on that?

[@sddiymakeitworthit7512]

Μπράβο παιδιά ειστε απίστευτοι 👍 😊 🙏

[@billymonday8388]

ellines einai?

[@gettosurfer]

I want to see the rematch. Nice work on the reed assembly.

[@Colt1775]

Almost to 2million subs, congrats on getting so far!!

[@nightwalker5278]

Wow!!!! Really enjoy this, interesting and informative. Thanks for sharing ATB

[@MrBen527]

Nice work there! Give it all the fuel you can also, pulse jets love it!

[@fordnut4914]

Guy has crazy skills.

[@horstszibulski19]

Frightening thing! 😱👍👍👍

[@papakrakazyabrika]

Отличная работа .👍👍👍🔥🔥🔥

[@RC3rdparanormal]

You are a true Master!

[@brianwood7480]

I could be wrong here, but I think the spark created at the 12v battery terminals might not be optimum for the fuel-air mixture to ignite. That said, I wouldn't like to be around to check out my theory 😜😲. Here's a fun fact for you fellow closet- machinist-test-lab-nerds: 57 years ago, as part of my electrical apprenticeship in the English coal mines, we had to study electrical, mechanical, and mining sciences to help us understand the underground environment we would be working in, better. Professor Hedley (mining sciences) was a really likeable hands-on teacher, and my favourite guy in college. In his class we learned that the perfect (and dangerously worst) Methane (Ch4) to-air mixture was 14%. The rapid-burning, expansion, or the explosion of this gas-air ratio travels at (are you ready) four (4) miles per second, when ignited. Now add powdered coal dust to the mix, and you get an idea how powerful internal combustion is. I was as curious as others here about the THRUST created by this pulse-jet engine. If anyone here understands the math involved in combustion physics above, I'd really like to know what you come up with. 4 miles per second multiplied by sparks per second, combined with the thrust nozzle diameter should make for some interesting numbers. Happy New Year from sunny S.Louisiana.

[@thelamb288]

Fantastic....as always. Hope you get to change out the reed valve shims for spring steel. Cheers.

[@Dave5843-d9m]

I’m surprised stainless steel shims were not suitable.

[@thelamb288]

@@Dave5843-d9m Stainless might not have the rigidity of spring steel to resonate at the frequencies in that application!

[@Vtwin60]

Waiting for Gerhard Feiseler worke to show up with an airframe

[@degreeless_engineering]

Were you able to get it to run without additional compressed/feed air? That's the only issue I was having with mine except mine maxed the propane flow capabilities of a normal 20lb tank (internal flow limiter). I was thinking about linking several camping style tanks together as they don't have these limiters (far as I know). I don't think I want to go the gasoline route quite yet. If you don't mind me asking, what unit did you go with for ignition?

[@miketee2444]

As a machinist I appreciate your skills and sweet shop. Probably should've just robbed you Reed valves from a couple old dirt bikes though. Gas sounds sketchy but shouldn't be any worthan propane. You've got me thinking diesel is the next progression now.

[@Crazy.Rocketman]

there was nothing wrong with the reeds, your pump was to small, I assume you were using my plans so your injecter should have been 30g/h just use the pump on my plans.

[@glambaro]

Extrem X ,gone to the Mars.Обажаю твои ролики.

[@constantinexi6893]

Nice video! As somebody just getting into pulse jets, I was surprised to see a modern example of the Argus reed valves. Thanks! Edit: BTW, are you planning on revisiting this project with tool steel valves?

[@Dave5843-d9m]

Three reed valves from big two stroke bike engines could be fitted to a pyramid shape inlet cone. One facing forward and one each side on the slopes.

[@jamesharrison4272]

How much thrust with spring steel? How much does it weigh? Will it fly? Twin thruster kerosene model? Will you ride it?

[@nikhilakapatsy]

the real integza

[@carlyleworkman1928]

Did you end up changing the reeds / springs?

[@fpvgods]

Now a word from our sponsor --- trees, happy, oxygen, trees, fresh air, 🎄🌴🎄🌴, awwwwwww so nice 👍 ---->>> GASOLINE!!!!!! FOSSIL FUELS!!!!! BURN!!!!! 🔥 🚒 RRRRAAAWWWWRRR!!!

[@behrouzmovahed7525]

Good job, amazing 👌👌👌👌

[@АлексейРяков-о4л]

Ооо, TIG сварка, моя мечта! Отличная работа!

[@erroneous6947]

Thank you.

[@Dubshydro]

Where do you get all this stuff and machines

[@haydenc2742]

Neat on how you built an enclosure for a submersible automotive fuel pump! You sure you ain't part German? Keep em coming!!!!

[@shegerketema6622]

MARVELOUS - RESPECT

[@nathancole1802]

I feel like I need to strap it to a bike or car😅 this thing is amazing hands down

[@mtnbound2764]

go cart!

[@ТукоРамирес-ф8ь]

Excellent work, amigo!

[@lonniedomnitz1720]

Would be cool to mount a load cell to measure thrust

[@nicholaswaskan9537]

So essentially 2 stroke without da piston

[@nhocdorebita145]

Let's build turbojet engine !!!

[@josega6338]

If you enclose the Pulse Jet inside another duct, larger and longer than the PJ, you'll have the Pulse Jet sucking air, as a Trompe would do, lowering final propulsion jet temperature, the air flow cooling the outer side of PJ, this heat being added to thrust. If added weight is compensated by the better efficiency and less sound print is to be measured, outer shell does not need being as hard or thick as the PJ itself. What is the thrust of your PJ? Pls send me one! Blessings +

[@Josefppaz]

Love the jig idea going to use that on my next one I build

[@minorityreport8718]

Best valve system

[@abdelhedihamedsghair6114]

how much thrust can this engine produce ?

[@djevo3441]

Amazing idea..... awesome job congratulations my friend

[@edwardroke3949]

I LOVE THIS

[@elberttanner6189]

That advertisement was much better than Chuckles the clown, but let me know when we are talking about 300 hectares or more.

[@garyweaver317]

Turn spark plug on first, turn air on next, turn fuel on 25% engine will start easy if you do it in correct order. Throttle engine up to 99% full thrust.

[@bennyd8471]

No back purging on stainless?

[@Kexx99]

Игоря Негоды на вас не хватает))

[@avi-crakhome2524]

Надо придумать как нагрев металла трубы превращать в полезную работу.

[@АлександрСлайерков]

Сделать вокруг трубы водяную рубашку, а пар пускать в полезную работу

[@davidrush4908]

That will wake the neighbors up!

[@jens-eriklangstrand1689]

Outstanding! Will you not test it with forced air into the reed walves (inlet) - or make new ones in spring steel .. The mail work is though already done excellently!

[@vadimchernushenko]

В чём профит этой зажигалки?

[@Krasnov_Misha]

Немецкие ракеты летали на таких двигателях, легкие, дешево и сердито.

[@helloslayer666]

FAU-1. А также такие двигатели ставились на некоторые современные беспилотники. Простота и эффективность. ПуРВД по динамике намного эффективнее, чем классический турбореактив. Но скорость ниже у ПуРВД.

[@ДмитрийНалога]

@@helloslayer666 эм может я чего-то не понимаю , но смесь горит внутри дичайше наколяя " двигатель " хотя по всей логике гореннее должно быть у соплового аппарата

[@helloslayer666]

@@ДмитрийНалога изучайте ПуРВД, матчасть, а не в комментах обитайте.

[@ДмитрийНалога]

@@helloslayer666 ну объясни для тугих коротко :D

[@nalissolus9213]

impressive, as always!

[@dimitar4y]

interesting design for the one way valve, but what's the thrust

[@memorynscars1985]

Did you back purge the stainless?

[@dolphincliffs8864]

What for? It's not sanitary pipe. A little sugar won't hurt.

[@Skyliner_369]

I'd see about figuring out if you could use Mr.Tesla's design of valvular conduit to reduce moving parts while keeping a high level of efficiency. I know some other channel would love to figure out if it's possible, but he lacks the equipment. Also, the valves need a very precise, flat surface to work right. it wasn't the steel type, it was that the steel couldn't seal against the base metal. the sealing surfaces need to be at the very least, surface ground. however, a higher polish will increase the sealing. the reeds, themselves, need to be precisely made, too, with the bends bing exact, and the edges being perfectly flat. this is a part you can't make without, either a really good shearing stamp and de-burr, or a laser cutter with rather optimized paths for cooling and avoiding warping. Just, avoid warping.

[@autojando7223]

Colin Furze entered the chat!!!

[@carpediemarts705]

Someone in Detroit made a pulse motor. Attached it to a frame with a vertical axle and a bicycle on the other side. You get on the bike and he lights the rocket and spins you around. Made me dizzy to watch. Made me deaf to watch also.

[@marcelofarinhacarbono]

Showwwwww muito toppppp e fácil de fazer 👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻