- Mar 10, 2007
- Auckland, New Zealand
- R22, MTO Sport, GyroBee, Mosquito Air
Brian,Regarding lag time, have you noticed any control input-to-control response lag time compared to the old mechanical version?
What is the role of the microprocessor; it would seem that the potentiometer's signal could go straight to the tail rotor motor controllers?
The micro reads the analogue input from the potentiometer, calculates what thrust command should be sent to the tail, and then converts it into a signal which the tail motor controllers can read. I'm using PWM which nearly all motor controllers will read.
Since the micro knows what the main motor torque is, it automatically compensates for main rotor torque variations. It's really nice to fly as it requires a lot less foot work than a conventional tail rotor. During startup the tail motors automatically speed up as power is applied to the main rotor.
When testing engine outs in the hover I found that the response of the tail was not as fast as a variable pitch tail rotor. This is mainly because the motor controller response parameters are still set at very low levels, I'll have to program them to be more responsive.