Full Throttle Test: Did we Push a Pulse Jet Engine to its Limits?!
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- Опубликовано: 26 июн 2024
- We bought and built a pulse jet engine. We test it without an augmenter in this video, stay tuned for our next video where we try to increase its thrust. If you try to do this at home, please do it safely.
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something aspiring scientists should note here. "I was wrong" is a valid outcome and not something to be ashamed of.
I know that I can be wrong about nearly anything but only because it's happened so often in the past.. 🤪
Hell, me being wrong in some way is about the only thing I can really count on being true most of the time.
The most powerful thing in science isn't "Eureka!", it's "Huh... that's odd. I wonder why it does that?"
let's take it one step further-
when you have a theory in your hand
practice reversing it several times
and only then allow your mind
to look for ways to investigate-
you see in this way
there is only investigation
-the only wrong is knowing the outcome
-before you do the experiment
ps everyone; be a scientist
You should do everything you can to disprove your hypothesis. If it's not falsifiable it's not science.
"I didn't believe them..." The line that starts all great science stories. ❤
And not really starting small...
I been thinking, couldn't a Tesla valve possibly be used on one of these engines? Keeping the flow in one direction possibly inject fuel in the valve?
No.
The problem with his valve is that even though it favors one direction of flow, the difference is relatively small. To achieve a significant difference, it requires a lot of stages, and this interferes with flow in the desired direction.
@@TechIngredientsCould one CAD that and run a fluid flow analysis?
bruce simpson from new zealand has been working on these and posting them on the internet since around 1999, google it if you want some nearly lost internet science
Waiting for rotating detonation engine
There is a universe close by where Tech Ingredients and Integza are neighbours 😂
And Styropyro lives across the street!
Or a turbo strapped to the exhaust nozzle!
I agree 👍 that would be awesome 😊
Oh
"Loud, and so far, no police" sounds like me on a night out. Great video guys
So far no Interpol.
no great story ever started with a glass of milk
An ER nurse shared that her patients too often are still reveling in a good time.
Kudos for good judgement!!
@@SupremeRuleroftheWorldEver play Legend of Zelda?
@@gaelonhays1712 i have no. i refuse to buy nintendo because of their shitty treatment of customers.
When I was 16, in the 1950s, I tried to make a pulse-jet from a 3 inch steel naval gun shell casing that my dad brought home. I went through several drill bits opening up the base as that casing had been hardened from its one time use. Not having worked out the flutter valve yet, I wanted to test the fuel injection, which for me was a Colman stove generator unit. It scared me when it shot a flame 16 feet long across the garage floor and I instantly closed the valve. Apparently I had built a flame thrower instead.
Tipping the shell casing up outside the garage I looked down the barrel and seeing some remaining liquid at the bottom decided to get rid of the evidence. I dropped a match down it and the resulting puff of flame singed my eyebrows off. I was lucky that that was the worst of that experiment in jet power.
Eyebrows are a small sacrifice for a good story .
hey, i also have tried to drill through spent large calibre casings..hardened through its one time use??i never considered that,makes sense! thanks
Nice to see someone here older than me. Was 7 as I cleared to 50s. Reminds me of looking down the throats of dual quads when the engine backfired. My brother said, "You should see your hair man!🤣"
You’re lucky. I still have scars on my arm. 4th degree burns.
I call that a partial success!
By the way, one of the engineers helping build the pulse-jet for the V1-german-rocket in WW2, lived after the war in Eastern Germany, and invented the 2stroke-engine-resonance-chamber, based on the function-principle of the pulse-jet... Was later taken by the Japanese (Suzuki), to help them with his know-how win 2stroke-bike-races for Suzuki... The resonance-chamber is what first turned the 2stroke into a performance-beast as it replaces the charger (which 2strokes anyway didn´t have, or any other engines, for that matter), and it´s a piece of tuburarly-shaped-metal-sheet, very cost-efficient, when compared to expensive turbo-chargers...
I played around with expansion chambers for two strokes in my youth. I didn't find them efficient for road use. I think there is a very narrow bandwith in RPM and temperature at which they work and it's hard to keep to this in everyday road riding conditions. They are popular on small 2 stroke aero engines which usually operate in constant speed conditions.
@@nrml76 The whole theory around them isn´t trivial at all. If the baffle and the diffusor (the 2 cones of the chamber) have flatter (so, the 2 cones are longer), the bandwidth loses height, but gains extend. If you make them flatter, you have to make the belly(straight piece between the cones) smaller, cause the altogether-volume of the chamber has to be constant (depending on the cylinder´s cc). there´s a lot to that, sadly, and during youth one has time, but not experience or knowledge. if the cones have sharp angles, the bandwidth is high, but short too. if the cones are sharp, but the exhaust-pot´s upper edge is rounded, it counters the effect of the sharp cones, and nullifies the chamber´s effect somewhat, giving you a short AND low bandwidth. if you make the port´s upper edge straight, and the cones shap, you get the shortest bandwidth, but the highest one, aka highest performance. If you make such a sharp chamber´s pipe gliding on the exhaust pipe (2-piece-pipe, gliging in each other by a strong servo, automatically matching load and rpm), u get a the sharpest combination (aka highest performance), but can match it then to every rpm/load-situation, stretching the bandwidth 3-4 times (to a few 1000rpm). But it´s very few people doing that (the pipe from the port to the chamber is a 2-piece pipe, gliding in each other, so the exhaust can be short or longer, depending on engine load/rpm). Normally done solely in previous Eastern Germany (2stroke-tradition cause of the decades-long trade-embargos of the West, that made 4strokes unreachable) and Holland (racing-tradition on 2strokes). Look for "Variable length two stroke exhaust with servo", you´ll find 2 video´s in YT, and there´s a few more...
Living in a railroad town in the 50-60s railroad brakemen had a portable pulse jet for heating up frozen running gear on train cars. Our town also had a pickup truck mounted pulse jet that expelled DDT for mosquito control..
"let's go outside and annoy the neighbors!" I love it...
Anyone else thinking of Colin furze pulse jet bike right now ?
But with our beloved "main presenter" giving a great ignited expand./ retracte restart blow by blow description of the entire pulse jet engine process ..
When I was a youngster, sixty years ago, I really wanted to build a V1 on a test stand. Thanks, I love this!!!
Perhaps a good starting point to go forward safely is to anchor a table with short legs.
bolt your test platform down in the back of your pickup, that way you might even be able to show a "practical" implementation using the thrust to power a vehicle.
Just wait...
If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious shit.
Would your vehicle remain "Street Legal" at that point? But the real question would be could the police catch you to tell you it wasn't legal anymore? LOL.
If you can build a muffler for a pulse jet that doesn’t kill the power output, you’d really have something fun to drive around town! No more tailgaters either. Or at least not repeat offenders!
@@robertedwards7749 they might keep a fair distance to you, with lights and sirens on, the sirens you wont hear though. having a glowing red pulsejet engine on your back speweing flames .... yeah 50m minimum
"Hello, 911? Yeah, it's me again. He's blowing something else up. "
Well it wasnt illegal the last 6 times you called so please stop.
@@thetruthexperiment "Noise complaint? ... Noise complaint..."
For a pulse jet, there's an optimum length and shape for the tube, and the cylinder isn't it. It's simply the cheapest.
Yours was by far the best explanation of pulse-jet operation I've heard yet!
There's an optimum for power output, an optimum for power-to-weight ratio, an optimum for fuel efficiency, an optimum for cost...
Since pulse jets are usually used where cost optimization and ease of production are more important than power or efficiency, I'd argue that a cylinder *is* optimal. Rockets are better for power but inefficient, turbojets are better for efficiency but expensive, etc.
Surely the cylinder is most practical, unless you want to compensate for differences in soundspeed in the variously heated portions of the chamber. This is like making a transmissionline, as in acoustics. Tuned to a frequency by the length of the tube. Like a flute even.
Gentlemen, I hope you appreciate the opportunity presented to you to be able to work with your Dad, the presenter.You will look back on these times as some of your most precious memories. Your father is a genius with a curious mind in many different fields and also a great teacher. Without even knowing him I love him. He reminds me so much of my own father who not only was a genius and excelled in his chosen field of chemistry, he was also a teacher and an athletic coach during his life. He touched many lives. You all are living special lives, cherish every minute together if you can.
There's a old guy named Robert Maddox who put a pulse jet engine on a go kart and goes to the salt flats early in the mornings to drive it around. He put them on skateboards, sleds, all kinds of things. Living his best life you could say. He has a RUclips channel, highly entertaining, definitely recommend it. PS I love the look of satisfaction on your face when that thing starts up flawlessly.
Yup, Rocket Man.
British RUclipsr Colin Furze did something insane with a valveless pulse jet . I won't spoil the video but it's worth a watch .
@@TechIngredients I was super impressed at how reliably it started, but underwhelmed at only 30 pounds of thrust. Can't wait for the augmenter. There was discussion of using an augmenter on canard aircraft piston exhaust to increase cooling suck from the cowling.
rocket man, burning up his propane out there alone.
@@balaclavabob001Excellent video! He also made a turbojet in his shed that was hilarious when he fired it up.
"Ask Questions, Question the Answers!!!"...an excellent indicator of all true scientific inquiry!!!
And answer the questions, eventually :)
You guys are awesome, bringing High Technology to the realm of the back yard mechanic.
I'm from New York, if you guys ever did a Tech Ingredients Festival I would be there.
I fully appreciate you STOPPING what you are doing as opposed to getting into the "get it done" mindset. Very nice showcase of proper procedure.
Everyday is a good day when Tech Ingredients has a video out.
That power is insane, you could almost feel the vibrations through video haha. I love that you're making more jet engine related content again by the way, keep it up.
One of the most satisfying moments is the genuine mad scientist laugh... 😊..... of course the son's very genuine 'nope , nope , I don't like it ' response is very reasonable and also satisfying 👌
I love this video it may be one of my favorites from you so far. I appreciate so much that you admitted you were wrong, and showed that being wrong isn't a bad thing either. You had an idea, tested it and found your result. Even though it wasn't the one you wanted. Then stopping the tests to make sure you all stayed safe I hope so many take away these great examples you're setting.
Always a joyful moment when I see you guys upload a new video! Thanks for your ongoing efforts.
Cant wait to see the augmenter in action. Great video as always. Thanks guys!
You do everything I think about. Glad to see you enjoy yourself learning new things and applying your knowledge to what you do.
I absolutely love this channel! Its always so fun to see what's next!
looking forward to your next upload, best of luck with the project and well wishes.
Absolutely love this channel
Love this channel!! Great work!
I love this channel's absolute in depth nitty gritty explanations, it's always the little basic things that can catch you out on a project, but they cover everything, plz never change
Mad scientist!!! Love your work. Educational and entertaining
Cant wait to see the next experiment. More power to you !
The first pulse jet I built was made out of an empty brake clean can, some conduit, and some muffler mender puddy. I had about 2.5 seconds of resonance before it blew apart. All of the mechanics in the shop all threw their hands up and cheered 🥹 it worked perfectly!!
Amazing demo of a pule jet. That's nuts!
It's such a joy watching this excellent channel grow.
Wonderful video as always. Can't wait for the next one! I hope that possibility of double the power output turns out true
very cool. i appreciate the precision you use with language when you explain things. you are very good at explaining things.
Love this series and the quick updates!!!
11:54 Definitely a good idea to be listening to “Silence” by Acoustic insulation when performing a noisy chore like running a pulse jet engine.
From the moment I heard about pulse jet augmenters, I've wondered how a full-length augementer would behave. Basic idea idea would be to increase the mass flow rate ad a normal augmenter does but also serve to cool the engine and draw a stronger air flow into the intake. If I recall correctly Messerschmidt had some interesting patents to that effect just after the war.
The Reed valves the resonance chamber and the simplicity really reminds me of the 2 stroke engine. :)
This was a beautiful test thank you
The previous jet engine was a small engineering marvel and looked more efficient too but i can't not fall in love with the angry tube, brutal!
Love this series, the engine sound is so intimidating.
I am happy to see Safety is not last, have fun be safe love the videos, and can't wait to see the next one.
Awesome. And I like the commitment to safety, that might be the most important message in this video
Thank you for sharing this video! It's fascinating to see you experimenting with a pulse engine. I appreciate the emphasis on safety and cautioning viewers to be careful if they try to replicate the experiment at home. Looking forward to watching your next video and seeing how you plan to increase its thrust. Keep up the great work!
Police?!? How the heck did you NOT have every kid that lives within two miles there checking it out. We would have been there in a heartbeat...but, then again, that was the 50s😎
Beautiful. Keep it going!!!
Such a nice adventure, the priceless smile on your faces. The strong vibrating table was for me a concern too. And now op to the million+ subscribers. we can’t get enough of these “ naughty “ experiments.
Very good to stop and make it more safe. We don’t want you become airborne….
Great job as always!
13:20 The laughter is so genuine and infectious! 🙂
It's also about time to think of a bonus video for hitting the 1 MILLION subscribers target!
Well, almost... but they stopped! LoL
But this one has staying power!!
Can't wait, stay safe. Thank you
I greatly admire tipping your hat to safety, bowing down to the "by-the-book" hunch, better to regret not doing the test that day then regret any other outcome. good job boys
That sound was unexpected! Very cool!
Looking forward to that next video, thanks
In the 1960s, some model pilots built pulse jet engines with star-shaped flutter valves. However, these valves only lasted for a very short time for one or two flights.
So, with modern materials....
5 flights🤣
Best explanation of a pulse engine i ever heard 👍🏼❤
Another excellent video, guys.
These videos are not only educational, they're so much fun!
Love the new short vids. Keep em come'n boys 👦 🔥
Great stuff as usual...
This channel will reach 3 million subscribers at least I’m surprised it’s not there already, I really enjoy watching these experiments and how you go into depth on them? And such a variety of experiments as well, thank you.
Once again,very cool,very funny,and best of all, very safe...who knew?? I think the two of them are beginning to "get" humor. keep em comin!! thanks for making my birthday great!
Can't wait to see the augmenter in action. Best of luck!
I've ALWAYS been interested in pulse jet engines and you explained how the actual science works very clearly, thank you!
You guys like playing with fans, hot things, and thrust... I'm sure you guys have seen the turbo burn barrels that were popular on the net a bit ago and I think you guys should try to make one but put your own Tech Ingredients spin on it.
If anyone isn't aware of what it is, it is a barrel full of wood that is sealed except for one hole which is fed into a turbocharger. The turbo is spooled up with a leaf blower which pushes more air into the barrel which makes the fire burn hotter which spins the turbo faster and faster. They are crazy.
They are.
The major issue is turning them off! Unlike a fuel line with a valve, the only option is to block the intake of a running turbocharger, and that can momentary over speed the compressor and turbine.
@@TechIngredients I can't remember which video it was, but there was a group that made one that quickly got out of hand and it definitely seemed like they were having a hard time stopping it. I wonder if a high strength valve of some sort could be placed in between the hot side of the turbo and the intake from the barrel so the source of the high pressure gas could be stopped.
I've always been interested in the operation of turbochargers whether on car engines or when people repurpose them as a jet engine or a burn barrel.
@@TechIngredients whood is lame! just put a nozzle in the barrel and pump any flammable liquid, it will burn fine and its painless to stop.
Oh wait that its just a jet engine with extra steps.
@@TechIngredientsBlocking the compressor section inlet, will cause an instant "compressor surge", wich is a kind of compressor instability phenomenon, with inlet flow reversal, highly probable to damage shaft bearings and seals.
In commercial airliner engines, compressor surge can be experienced in rare occasions by simply altering the inlet flow direction (by getting the Angle of Attack of the airplane too high, or by sidewise wind during take-off or initial climb. But modern jet engines being of the Axial Flow design, the surge phenomena is of a slightly different geometry than in centrifugal compressors, but on the Pressure-Flow diagram, both are the same "surge" phenomena.
I think instead of blocking the turbo, have a lid that clamps over the end of the barrel, so nowhere for the 'exhaust' to go.
That is so mean! 😄 Can't wait to see part 2 of this one.
the fact that augmentor can almost DOUBLE the thrust of a pulsejet is mind-blowing. Just a simple bucket at the tail end and BAM, now your engine is supercharged.
We'll see...
this channel rocks.
Another exciting video, can’t wait for the follow up.
You all are having way too much fun!
Grate video. I had built one a few years back and it was fun. The main prolbem i had was bending the reed valves (triangle springs) from the heat and pressure. It defiantly had the whole neighborhood calling the police on me. Mine failed spectacularly. 😊
this is the best explanation of a pulse jet engine ever!!!
There is a ton of videos out there of people putting pulse jet engines on scooters, go-karts etc. Not very educational, but extremely entertaining.
On a side note, pulse jets engines operate the same as scavenging on piston engines. Way back in the day it was thought you needed back pressure to get an engine to run right, because when the exhaust manifold was removed the engine lost power. Later they figured out it was the exhaust pulse causing a vacuum which helped evacuate the cylinders and suck more fuel air in that caused the boost in power, not back pressure. Cool stuff.
Great video, nice explanation. Thanks
Quite a work! Thanks a lot
A new Tech Ingredients so fast? Makes sense since you had the equipment on hand from the last video, glad to see it.
You mean *the ingredients*? Eh? Eh?
@@joelandersson3474 hehehe yes hehehe
I love your channel, some of the coolest videos around as an engineering student. Keep at it😉
Thanks!
We will.
Great Lecture!
That was fantastic. I love pulsejets to no end. I'm sure everyone within a mile of you is substantially less in love with it right about now, but I sure enjoyed it. And yes, I totally understand your hesitation in running the augmenter on that setup. Might be best to anchor that table to the ground with some concrete anchors or something. Because that getting out of hand could be very deadly. But awesome video anyway. Really looking forward to seeing what happens later with the augmenter. Great video!
I love these videos, Good Stuff
Loved this. Glad tou mmare making a part 2 with the augmenter. Want to see what level of force it can generate
Pulse jets are their own whole level of awesome. A good scientist is always learning. Just as you do.
Fascinating and exciting. Thanks for sharing. I’d love to know more about the early history of the pulse engine.
Great stuff! Thanx for sharing!
Almost 1M subscribers. You deserve it.👍
Top video, love these crazy pulse jet engines ;)
Thanks for another awesome video!
This has remained my favorite channel and I'm confident it will continue that title.
Man realy hope to see the next video soon so hype
I would love to have a dad like this.
A bigger blast shield, well mounted, might be wise. And maybe a little more distance from the burn. The project is fantastic. Let's help these guys pass a million subs...
Love you guys, Also from NH
Can't wait for the follow up!
Thanks for the share.
Yay! Always get a little excited when I see a new Tech Ingredients video uploaded! I wish I could be this fellows neighbor! We’d get along very well I suspect!
mad respect for the end!
This channel has awesome builds but the explanations really set it apart. Thinking about the speed of sound in air as a function of the energy of particles bouncing against each other makes so much intuitive sense yet I was never taught it. And to do it all in one shot!
If I were your neighbor (or the police for that matter), I'd be asking to be invited over to see what's going on. People would pay handsomely for such a thing, I'm sure. This one is damn near the tiny speakers stuck to foam panels video. The next one is likely one of the most anticipated videos of mine, in years. Thank you for sharing your engineering shenanigans with us!