Propulsion

The Propulsion step places the lift rotors and the forward motor, chooses their propellers and motors, and sets up the battery.

Rotors and motors

The list shows each lift rotor with its number, position (for example front right), propeller, motor KV and spin direction (↻ CW or ↺ CCW), and the forward motor. Change layout returns to the Layout step.

Puller at the nose and Pusher at the tail place the forward motor.
Place a forward motor places it where you click on the model.
Size the propellers proposes propellers for the mass and the speed.

Select a rotor to edit its position, thrust direction, propeller and motor.

Motor data

Give the motor’s datasheet to fly on its real thrust, current and battery:

Motor model	The name of the motor.
KV	Speed constant, rpm per volt.
Resistance	Winding resistance.
No-load current	Current with no load.
Current limit	The maximum current.
Top speed	Reached at full throttle, whatever the battery.
Propeller weight	Sets how quickly the motor answers. Estimated from the diameter until entered.
Thrust test table	The maker’s table for this motor on this propeller, with the voltage it was Tested at.

When one motor has a datasheet, every electric motor of the aircraft runs on the battery; the others start from an estimate that keeps their top speed.

Battery

Cells (S), Capacity (mAh) and Resistance (mΩ) describe a lithium-polymer pack at 4.2 V a cell when full. The table shows, for Hover, Cruise and Full lift, the throttle, current, voltage and how long it lasts down to a fifth of the charge (for full lift, the thrust to weight ratio).

If the lift motors cannot hold the weight in the middle of the battery’s charge, a warning is shown.