I am having problems with my jetcopter which was running fine when I quit using it three months ago.
it starts ok and spools up fine to full power but after 3 to 4 minutes of hovering, it starts loosing power and head speeds lowers gradually... I land it and let it sit for a minute then spool up again and it does spool up fine the second time but rpm start dropping again shortly after and I have to land it. If I try to do it again , it does not accelerate.. i would advance the stick to full throttle and it would do nothing..
I think the problem is related to the protection mecanism that lower rpms in jetcats when temperature rises above normal values. I read in runryder that cleaning the FOD screen would help improve fresh air admission to the turbine thus cooling it down, I also read, that it could be related to failure of the temp probe.. I did clean the FOD Screen with carb cleaner and a tooth brush, Also replaced the temp probe and problem persists.
I am getting temperatures close to 720 celsius... One thing I have noticed is that even letting the turbine sit at Idle does not cool it down. My HP-5 acts as if temp was only incremental and it keeps building temperature that never lowers but that keeps going up instead preventing the turbine to spool up due to over heating.
I would Appreciate any thoughts you may have on this matter

Not sure on the heli turbine but on the turbo jet version you can hold the Manual key and slowly take it from idle to full power (take about 15-20 seconds to do the transition) while continuing to hold the manual key and it'll reset the atmospheric data and usually helps with these sort of issues.