This easy to install unit will enable you to reverse the pitch of your brushless motor IN FLIGHT! The list of possible manuevers is endless! The unit includes 2 9" blades and outrunner motor, and the variable pitch assemble. You will need a servo to control the pitch assembly.

Spec.
Motor: D3124-1600kv
Voltage: 11.1v
Weight: (About) 43g
Prop: 9inch

Kv (rpm/v)1600
Weight (g)43
Max Current (A)0
Resistance (mh)0
Max Voltage (V)11
Power(W)0
Shaft A (mm)4
Length B (mm)23
Diameter C (mm)31
Can Length D (mm)9
Total Length E (mm)45