Designation:
It operates as starter motor during turbine starting and then works as generator supplying the aircraft mains. Designed for use in turbine-engined helicopters.

Description:
The starter/generator is a four-pole DC machine. Its housing contains excitation poles with shunt - excitation windings and commutation poles. The compensation windings is situated in the excitation pole shoes.

Technical data:

Starter motor
Armature supply voltage 30 V
Torque on shaft 1.5 kGm
Rated speed 3900 rev/min
Max. armature current 310 A
Type of duty- intermittent 30 sec operation, 3 min break

Generator
Rated voltage 28.5 V
Output current 100 A
Power output (at 30 V) 3 kW
Speed range 6250 to 11250 rev/min

Weight of the starter/generator max. 16 kG