I built an Electric Jet Engine from scratch

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3D Models

#3dprinting #jet #electric

[Project-Air]

Wow, that thing has some beans! Pls let me put it on a plane

[georgemathieson]

It's finally happened, just like every other STEM YouTuber, Integza has realised he needs a spot welder... and proceeds to make one himself.

[chancegaddis]

Filming idea: When you want to record a shot from downrange of an jet engine, use a mirror. This lets you keep the camera equipment out of the line of fire, while only risking a much cheaper mirror.

[donnieboose]

Came for the Jet build, stayed for quite possibly the most rudimentary spot-welder I have ever seen. Well played.

[Weisz]

This is so insanely cool dude! Now i want my own jet skateboard hahaha

[JLee-tbwe]

Video idea : using your welder and new engine to make a rc rocket, one that has controllable gas output! Maybe even controllable stages?

Remeber! Tomatoes are disgusting 🍅💀

[BrettDanSmith]

Why not try attach this to a lightweight foam glider and see if it'll fly!

[NiMareQ]

11:57 The effect how the engine nozzle shrinks due to the hot air is amazing!

[dannyboi]

Video Idea: Make a thin tin sheeting metal plane that uses the spot welding and a rc prop or make your own engine for it, either way, I think it would be really cool to see something like that

Love the content, even if it is only every couple weeks.

[lvdox]

Pro tip, when you cut fuel in your engine, you’ll want to spin the compressor fan for a few moments after to run air through the engine. This helps it cool down and prolong the life span.
Also if you want to film inside your engine and not burn the microphone, put a mirror in line with the exhaust port and angle it with a camera so you don’t burn the camera. The exhaust is pointed at a mirror

[joshuadelaughter]

I love how this has slowly shifted from a 3D printing channel to becoming more like a full on Hacksmith type channel.

[calebprugh]

I know I’m not the first one to say this but, wow! I was extremely impressed with the self made spot welder! Insanely good job, been loving the vids!

[LeBrosWeekly]

I love seeing how much you've improved with metal fabrication, that home made spot welder is beautiful

[pavankoty]

Using sheetmetal and your spot welder now, you can try to implement a few different nozzles for this which would greatly affect the thrust products. 3D printed dies also can be used to bend sheetmetal.
I guess it's time build a thrust set-up to characterize your homemade jet engines!

[snortiblog]

It looks like the engine would benefit from some sort of restriction at the exhaust as to increase the escaping gas velocity, assuming you can keep compression high enough at the intake. Some sort of a CD Nozzle should be pretty simple if you made out of a can or something, especially with that spot welder.

[Rotorhead]

Quick note: Not all jet engines are the same. For example, the one you used in the beginning of your video is a high-bypass, turbofan engine. This means that the vast majority of thrust is NOT produced by the engine exhaust, but by the fan at the front of the engine.

[lyricalleopard]

I’m genuinely surprised at how smooth the manufacturing process for literally everything was, from the body of the engine to the spot welder, like how

[SuperMegaValy]

9:00. Next time use a mirror placed in front of the exhaust at an angle so you don't damage your equipment. Awesome video !

[AlexJoneses]

As someone who takes thermodynamics, I can say that you summed up the theory very well, would've appreciated to see an explanation of how expansion and compression is isentropic (meaning zero change in entropy, or just incredibly efficient), and heat addition and removal is constant pressure, and unfortunately it's hard to call this a jet engine, more or less a ducted fan with an overpowered afterburner. If you really want to make this a jet engine, you'll have to create the correct geometries so that the fuel and air can be ignited with a constant pressure, and the compressor, and more specifically your expansion process can follow a more isentropic curve. Also, your compressor isn't much of a compressor really, it just accelerates air and then heavily restricts flow, which just increases entropy really. If you want to make this more efficient, and potentially fly something, and believe me I've given this type of heat engine a lot of thought you need to do 4 things:

- Compressor, make a 3d printed in your case, more preferably with titanium sls, or milled titanium, with multiple sets of blades (i'd recommend just copying blade geometry from existing turbojet designs) with an increasing inner diameters so that air is smoothly compressed which will greatly reduce your entropy generation, and achieve a much higher pressure. Also, make sure the tips of you blade do not exceed mach 0.9, I ran the calculations earlier and with a 10s 400kv motor, I think that made a blade diameter of like 150-200 mm, this of course would be the most efficient set up for isentropic expansion

- heat addition, id recommend changing what type of fuel is injected and how it is, personally i'd recommend isopropyl, 99.9 percent because it is cheap and easy to acquire but has a very large energy density, similar to kerosene, but burns at a lower temp. Youll need to create a way to push the isopropyl through small holes to atomize it, so it can combine perfectly with the air and allow for a constant pressure heat addition (which you'll also need to model geometry for), and increase efficiency

- Expansion, this really is just all geometry based, and with your knowledge of rocket engines you should be able to figure out how to turn high pressure zero velocity air into low pressure high velocity air.

Good luck I hope you revisit this, this is a very cool project and the engineering behind jet engines is very fascinating, also screw tomatoes

also fun little bit of thermodynamics: Work (net) of a breyton cycle turbine is equal to Qout - work (compressor), what you're doing here is maximizing Qout by making all the compressor work be from the electric motor

[truckingfamily]

This isn't an ideal commitment for your channel it's a thanks for all tha hours you put into your work you have gotten me to use my 3D printers alot more instead of using them for paper weight so thanks keep up tha great work.