Does this imply that the rotor with the pivot will be offset in normal flight to compensate for the fact that there is an uneven number of props? Two props rotating in one direction with only one prop rotating the opposite direction will cause the craft to yaw. So even with the non symmetrical nature they still fly well?
Why does the Tri-Copter need a servo to yaw one of the motors? Wouldn’t it work to just proportion between two motors? (I’m no expert, nor particularly versed in 'copters.)
I’d like to build a TriCopter. However a 'quad would have some backup if a motor or motor driver failed.
As Eric mentioned it requires 6 or 8 motors. I recently read about the redundancy of these little guys. There are different levels of redundancy. You can have a single control system that controls all the motors, or you can have complete redundant control systems. The cool part is if you have self leveling and a motor gives out, the system should automatically ramp up the other motor to compensate. Of course performance will be reduced, but you can still land.
No even 4 motor copters can’t be made redundant. The way it works is two motors rotate CW and two rotate CCW. This way they cancel each other and there is no yaw. To do yaw you speed up two and slow down two and the copter will turn. If one of them dies the copter will spin out of control. With 6 or 8 motors there is one on top of the other rotating the same direction. In this case there is much less an issue with the rotational imbalance and still plenty of lift to land safely.
It’s no secret I have been bitten by the multi-rotor copter bug. I have been collecting parts for several builds. My new workshop is starting construction next Monday. This will give me a place to work on these new ideas. And as Eric pointed out I intend to use the Botboarduino for the controller. I intend to have several kits soon. A little diversification never hurt anyone.