James is amazing... Thanks for watching!! Please thumbs-up and subscribe! ...

What a fabulous insightful presentation. As an ex RR guy this has inspired me to make one myself. Thank you for sharing this.

I built the FD3/64 with the ply compressor back when the book came out as a college project. It was an exciting time when JPX were one of the first micro turbine mfr's for model aircraft on the scene. So much has progressed in engine and airframe design.

Beautiful backyard jet, nice how the fuel is injected

4:09 I think the 5mm gap at your finger tip between the turbin blade root and the combustion chamber output leaks hot air into the aft bearing from the rear, which can damage the bearing. Also the turbulence of air leak itself reduces fuel efficiency. The improved version at 5:36 shows the 3mm gap is much smaller and more reasonable. But I think the factory made engines keep the gap smaller than 1mm.

James did the axial ever run? ive dug mine out of the chicken shed to give it a good clean up, get it back up to original condition again

Just one slight correction, a turbine works on 4 cycles is however no 4 stroke engine.

Awesome those insides!!

I would actually like to do this , is there any drawings , or where can I get the information??

Truly fantastic demonstration/discussion! One of the best explanation of basic miniature jet engine designs I've ever seen - bravo!

Just wow ... just wow ... my heads spinning

Most excellent explanation, chaps! Thanks for sharing this content.

Wow. What a brilliant explanation.

Even i also want to make my own model jet engine ,you are brilliant bro🏻️