You can close the thrust cone up to 650 degrees of temperature. Your engine runs very cold, it can rise in temperature without problem. This will increase the thrust. KJ66 at 85,000 and personal stainless steel wheel pushes around 2.7kg. To fly a small jet correctly with you need 2kg of thrust, no less. Diesel provides very slightly less thrust than kerosene, but this is a matter of a few grams, nothing significant. Closes the thrust cone by a few mm
I will try making a too narrow thrust nozzle and open it up until egt temperature is acceptable 👍 Maybe try a single cone like the newer engines to save some work 😀
Hi nicolas, I got an answer from James over at gtba. He explained how a mismatched turbine wheel can restrict the mass flow in the engine. I checked the angle on my blades and found 20 degree trailing section… it should be 34 degrees. I read the drawing wrong. I will make a new wheel and test with that. Thank you for your suggestions and comments - i really appreciate them. Best Regards Jogeir Emil
@@joemgj Yes if the angle is too tight it doesn't push much. It's all a question of balance. You can try simply twisting the blades to the correct angle. This is what I did on my FD3 64 with the stainless steel wheels. Stainless steel twists easily. I think it's worth a try, you can make a new wheel after validating the test with the old modified wheel.
@nicolasm7012 I have started on a new wheel. I cut out a disc with my plasma cutter yesterday and have bored the hole and turned it to size. Work will continue today 😀 I am doing a demonstration at my local club on saturday so i dont dare start bending blades on the old wheel in case i screw up.. spectators will be happy with the sound alone, they dont care about thrust on a test stand 😀
