Maybe make a metal melting forge while he's at it.

@@chubsythedog2325 Like The King of Random!

I'd love to see a waste oil burner setup.

@@jacobbatesmitchell4189 I really do hate the new TKOR. They are like an ordinary "Life hacks channel" nowadays.

under and hour and already 500+ likes. i guess enjoy your 3D printer.

There goes the printer

That would be fire as hell

the second part might be hard, as most of the previous engines blew up or melted hah

Not complaining too much. Made the same test rig suggestion comment before but this one blows up being slightly different with the shop suggestion. There went my printer.🥲 Well done.

I really needed a 3d printer. But I am unlucky 😢😢

Good idea

Guess who's getting a printer haha :)

Very cool jet bike! I wish I had the ability to make one. :)+

Yeah that's a really good idea actually. It would almost be like a turbofan engine in the way that the excess air goes around the inner core to cool it down.

Great idea. You could cool the engine with the air before it gets to the chamber, and by the time it gets to the chamber the air should be slow enough where he could get rid of the flame holder. It would increase efficiency drastically.

You mean something like this? es.wikipedia.org/wiki/El_vuelo_del_F%C3%A9nix_(pel%C3%ADcula_de_2004)

@The Game Shorts 🅥 ...

sounds like a lot of work. also whats up with the bots here.

@@multiarray2320 idk man

And scare every nuclear authority in Europe? From the sudden spike in radiation emission?

uh what? is this a joke or fr?

@@avroarchitect1793 I don't think you know what nuclear fusion is.

@@user-cg3em4cw4f neutron radiation is detectable and actively searched for. Particularly to search for rouge nuclear programs. Also to initiate fusion without the immense equipment that you see in actual reactors you need a neutron source. Both the source and reactor generate a neutron flux. The source usually is radioactive in other emission types as well. I know how fusion works. The US government raided a house once when someone tried building their own fission reactor. They found him by triangulating the source of neutron and beta emission. Edit There is a system of detectors globally that hunt for radiation leaks from reactors and nuclear tests

@@avroarchitect1793 You clearly do not know what you're talking about. Building a fission reactor is far different due to the ridiculous amounts of radiation they give off. This is what a fusor is. en.wikipedia.org/wiki/Fusor Notice it's listed as a popular hobbyist project. That is because small fusion reactors do not give off noticeable amounts of radiation and as such do not get picked up by the government.

yes! we need a control run, to show the difference between just the leave blower and the whole assembly.

yeah that would be epic to see how much power the combustion adds

That's one thing I'd like to know in a fair amount of these engine builds. How much force is he achieving from just air and fuel delivery VS how much thrust is the combustion actually producing?

He won’t do it because it’s likely the same and he knows it

Additional thrust was probably roughly 0.

My thoughts exactly!

My guess 1.5lbs leaf blower. 2lbs with engine.

@@martinda7446 even that is generous...

@@jjhack3r Ha, ha possibly yes.

This same thought had me here to comment.

Another tip, don’t direct the flame towards the joint but heat up the metal next to it. Once the base metal gets hot enough it will melt the solder and suck it into the joint.

another tip don't use brazing at all for a project like this soldering =/= welding and the dripping solder is exactly why

@@PTMG yeah, welding would be better with anything that glows during normal operations. I do think silver brazing would be an excellent solution for the intake side however, as the capillary action of the filler is really great for getting a seal around fittings and joints, and it is very nice on thin parts as not melting the base metal saves you from a lot of distortion issues. It can also be handy on dissimilar thickness joints. That being said, brazing =/= soldering.

"well actually...................." 🤓

@@flappyBoi ur whatching a nerdy channel what did you expect?

I'm not sure if the pressure ratio of the leaf blower is enough to worry about that.

Bell nozzles are pretty much only for changing the impedance of the exhaust to the air, this is done because the exhaust can only leave at the speed of sound so decreasing the pressure by expanding the nozzle can increase the exhaust speed. Also regenerative cooling is cool but it would probably be more efficient to just route some of the air from the leaf blower over the nozzle

@@KerbalChris Yes... Bell nozzles do increase the exhaust speed the larger the nozzles, but at sea level, eventually you start to run into issues(Flow separation, e.t.c.). Also I think it would be better to do regen cooling with the fuel since it's already at relatively high pressure in it's tank. Taking some of the leaf blower air to cool the engine would reduce the exhaust mass and/or speed and lead to a decrease in thrust and efficiency.

@@biohazardindustrieswr697 you notice how the engine flammed out when the leafblower was at the lowest setting? Thats what i was getting at with routing some of the air. Also flow separation wont be an issue at all, you’re still gonna use the expansion ratio for sea level and the ratio for that nozzle expansion and the throat wont contract the exhaust diameter too much

@@KerbalChris Yes, the engine did have a tendency to easily flame out. However, that in of itself is an issue. I believe the best course of action would be to incorporate multiple combustion chambers, splitting the air in between them, and keeping the propellant regen cooling. That would solve all the issues I think. As for expansion ratios and whatnot, as long as the ratio isn't too high, I don't think it'll matter anyways. Integza isn't spaceX. He isn't particularly worried about ISP and all that anyways. Just thrust.

guy needs a machine shop

Ya I agree

Honestly, it could be relatively simple. Given a flexible high-temperature coupling, all you need are two pushrods connected to the nozzle, and you have full control over rotation. A 50mm linear actuator can be had for about 28€ on amazon, and all you need is two of those and an arduino to control it all for the most primitive form. Of course, those are DC motors, so you need a linear enconder (or a linear potentiometer, which is easier to read and probably also cheaper) in case you want position feedback. For a flexible coupling you could just use aluminium duct hose, as long as your exhaust temperatures are low enough, or you can actively cool the coupling.

YESSSS this would be so cool It seems he's already chosen the people but you should definitely suggest this again

Washing machine would be interesting, those thing have pretty powerful motors.

Good to see you

In Spanish

Pilot lights don't do well with the wind. Even the largest of gas turbines use large ignitors.

It's actually kind of important that the air slows down for the combustion chamber, it increases pressure and also allows more complete combustion.

Exactly my thought too! if he where to put the whole assembly in another metal tube, and use 3 small EDFs to create bypass stream. it would pick up heat energy and create more thrust

i love how this is applicable to basically all of his videos😆

Propane is very similar to butane, except that it is harder to keep liquid, I recommend pentane for engines since it will not immediately become a gas allowing you to pump in very high pressure air for more powerful combustion

But something like octane(gasoline) works tol of course!

Isn't that a helicopter blades spinning but In jets and sideways????

An afterburning jet engine?

Came here to comment the same thing. It'd be a nice baseline, at the very least. ;)

@The Game Shorts 🅥 suffer

@@BenKDesigns Yeah

I was searching for other video's of rocket bikes and found this one ;) kzfaq.info/get/bejne/oZaGYMalxNnIiqc.html&ab_channel=RobertMaddox

I think it almost certainly is.

using the wrong materials is kinda his thing tho

He tried printing precise Nozzle’s that could withstand the temperature, and they were ceramics, but they leaked, due to the treatment process.

He can't print them at this size, and using wrong materials is sadly going to lead to failure, maybe he should get a tig/mig and weld thicker sheets of steel, with plumbing solder there's not a lot you can do as it's not made for rockets but for household pipes.

Hey you boring aerospace engineer, here is a boring mechanical engineer student. What he did was not WELDING, just simply SOLDERING. There starts the problem. But the nozzle is not necessarily out of Aluminum?

The can that he used wasn't aluminium though. It was steel.

brazing

@@Blox117 Since our friend Integza is Portuguese, and the Portuguese words for "soldering" (=brasagem) and "welding" (=soldagem) are quite confusing, I opted for "hard soldering". But you are absolutely right, it is also called "brazing". I've been brazing since 1973, when I built my first two-stroke exhaust, aka expansion chamber. (yes, I'm really, really old 😁)

Yeah I came down here to say the same thing. Just soldering basically. Integza, if you could get yourself some weldable sheet metal and actually do some welding, these would come out way more robust.

And brazing works in way lower temperatures which is why it melted under test. Actually welding thin sheets is a pain though, the spot-welder approach is a smart one

@@EeroafHeurlin Aye, if he wanted to try again he could reinforce it and try to make a design that worked with the spot welder, possibly have a pipe that fanned out on the end, spot weld that, another disk that could go over top of the welded fins or blades (not sure what to call them) with a larger diameter than the fins, and spot weld that as well. Seems a little overkill, but that might be the solution for what tools he has.

This is a reaction engine? All jet/rocket propulsion is reaction.

edit: or you dont 3d print it but it would still be something very interesting that you could do.

edit2: and a wood gasifier is basically a big metal furnace that burns wood and the gas coming from the burning firewood is used as fuel for the engine. It was used a lot during ww2 in finland, because normal gasoline was very limited during that time.

There's the Atlantic between them, I highly doubt that they'd be able to pull this off sadly

I don't think it's the most practical idea. See, Propane and butane can both be compressed into a liquid under relatively low pressure (up to about 15 bar). In comparison, hydrogen has to be stored as a compressed gas, which means really thick and really heavy tanks. In the past, we had a Volkswagen Polo that ran off of gasoline or natural gas (methane), and the methane tank took out most of the trunk. It was about four times the volume of the gas tank, and still the methane stored in it didn't hold as much energy as the gas tank. Given that methane holds more energy per volume of gas, (about three times as much), a hydrogen tank at comparable pressure will only provide a third of the energy of methane. And if we're talking about hydrogen/methane tanks, we are talking about a few hundred bars of pressure, compared to the 15 or so that propane/butane need. This also means following all the proper safety precautions for dealing with a multi-hundred-bar tank of a highly flammable gas. Gas tanks of that pressure are no joke, and if not handled carefully can easily kill someone.

You too

He already did that & some further variations of it

@Don't read profile photoshut up

The turbine is there to drive the compressor of a jet engine. Nothing more. Here it serves no purpose.

@@LuxGamer16 I suppose an afterburner would not work really well in this application.