Updated the multi-rotor forces and moments to agree with chapter 14. In addition, the bugs with going ~Mach 1.8 at full throttle have been fixed.
The model now includes:
Dynamic coefficient of thrust and torque based on airspeed through the propellers.
Induced drag model (present in the previous version). This is drag in the plane of the propellers.
Rudimentary model for drag on the body of the multi rotor, assumes constant cross-sectional area and $C_D$.
Ground effect (present in the previous version).
Revamped the motor position calculations to reflect chapter 14.
Updated motor model to match chapter 4, this means that motor response is more realistic.
In pilot testing it looks like the yaw response is a little sluggish, but still reasonable. It is hard to determine the cause, and it may not even be in the forces and moments, though if it is, it would be in the propeller torque calculations.
For default parameters, the top speed is now 58 mph, the prop speed spans the entire working range of the APC propeller chart and the aircraft responds appropriately to free fall situations.
Updated the multi-rotor forces and moments to agree with chapter 14. In addition, the bugs with going ~Mach 1.8 at full throttle have been fixed.
The model now includes:
In pilot testing it looks like the yaw response is a little sluggish, but still reasonable. It is hard to determine the cause, and it may not even be in the forces and moments, though if it is, it would be in the propeller torque calculations.
For default parameters, the top speed is now 58 mph, the prop speed spans the entire working range of the APC propeller chart and the aircraft responds appropriately to free fall situations.