Very Small Exhaust Hole

[enginewhisperer]

Start by making any RC aircraft and flying it.
Then build a small scale version of what you want to build.
Use an EDF or even a propeller to begin with and verify that it will fly and is stable.

You can confirm the expected vs actual performance before you spend the big money making the real thing.

If you can't afford to make small scale prototypes before the real thing, you will never get the real thing working without doing it all at least twice.

[racket]

Hi Andrew

This guy just doesn't want to listen :-(

I feel we're just wasting our time responding.

Cheers
John

[enginewhisperer]

it's a pattern I've seen with people wanting to go straight to the end goal of a complex high performance product while skipping all the hard R&D work or even learning the fundamentals.

[richardm]

A supposedly fifteen years old kid dreaming with no idea of what it involves and no will to find out by himself. You guys, Racket and others, have demonstrated a lot of patience so far.

[enginewhisperer]

I drew up plans for my first turbine engine when I was about 10 years old after realising that a turbocharger has the same basic components as the tricky parts of a jet engine.

It wasn't until I was 18 that I could buy an old turbo and make it happen!

I wasn't aiming for thrust though, just something that ran

[Richard OConnell]

👀 Hows it going in here?

[slittlewing]

This thread is a waste of time. Please can it be shut down or deleted.

-I'm building a jet engine from a turbocharger for a plane (obviously not going to work) with very low budget
-I need to fly a 20kg plane at 500kph with a 2cm inducer
-I need 22lbs thrust
-I only have access to oxy acetelene welding
-I will build an RC turbine engine instead
-Now I need 700kph and 1kN Thrust, worlds cheapest engine for $500
-BTW I'm 15 years old
-Now at any cost
-Now I need 600kph, and then 1728 kph
-Now I found out a compressor wheel alone is too expensive
-etc etc 600kph
-now Mach 0.9 (1111kph)

We all have dreams especially at a young age and I'm not trying to discourage that, but this is just tiresome.

[richardm]

Right I thought of building such an engine back in the 80's But I also had to go to work, take care of the family, etc Over the years I acquired tool and machines, learned to used them, developed some skills and knowledge. Im now finally there, retired and playing around with turbos and trying to turn them to jet engines.
That kid has to follow that same path. I dont think we are helping him much . He has to progress by himself first.

[Richard OConnell]

Yeah, I'm going to go ahead and lock this. I really appreciate all of the insights that have been added here and the time that members have taken to help our newcomer to decide on next steps in his ambitious project. I think I speak for everyone here in wishing him the best of luck in the construction and demonstration of his turbo-derived thrust engine and RC plane. Unfortunately, the scope of asks within this thread are too wide and unfocused. As others have stated, there are a lot of good books out there, many available in PDF form and widely available for free on the internet that answer the vast majority of the questions raised here.

I'm also going to move this because the discussion was more about construction vs acquisition and didnt make sense to live in the trade post.