Low C-rate with 1st flights after winter??
today went flying for the first time this year and during the second flight in a vertical line the engine sounded like a nitro engine running too lean. It just went down in RPM every now and then (this is full throttle, going up). Landed and put in another pack but again same problem. Landed quickly then!
All measurements you can get from the controller were normal (amps, temp, rev. etc.). No error messages as well. The engine seems mechanicaly fine. I also checked if any of the setups had changed (timing etc.) but all that was fine as well.
Any ideas? I think it is the controller but have no spare so I can't just exchange it to test. This controller and motor is one year old with 150 flights on it.
I fly a Jeti99+ Pletty Evo 30-10
Thanks for any thoughts.
Volkert
PS: I changed the Subject of the thread since it seems more likely I have a battery problem then ESC/Engine issue