Hello All,
I am working on a large helicopter build at the moment and am in the process of test flying it. However, despite the CoM being directly in the middle of the main rotor hub, I am having issues with the craft pitching up when i raise the collective more than 1/4. I have tried accounting for the rotors stalling by increasing blade diameter, but nothing seems to work. I just want this to be a controllable aircraft because it would be a shame if I spend all day working on it for it to be broken. Thanks for your help.