Graupner,COMPACT 390 9,6 V,6521

COMPACT 390 9,6 V Graupner 6521 GRAUPNER COMPACT BRUSHLESS motors.
A new range of high-performance BRUSHLESS motors. The prime feature of the motors in this series is their enormously high torque, which shows its true potential in direct-drive applications. The new GRAUPNER COMPACT motors are brushless ‘out-runners´, i.e. the outer sleeve of the motor rotates, and drives the motor shaft directly. This design principle results in particularly compact electric motors which achieve outstanding performance values even without a gearbox. A further advantage is that the weight of GRAUPNER COMPACT motors is very low compared to conventional motors.

Nominal voltage 9.6 V
Operating voltage range 7.2 ... 14.4 V
No-load speed 8250
Revolutions / Volt 860
No. of winds 15.5
Current drain at max. efficiency* 25 ... 35 A
Max. efficiency excluding gearbox 84 %
Permissible directions of rotation R and L
No. of poles 14
Overall length 65 mm
Case length excl. shaft approx. 39 mm
Diameter 42.5 mm
Free shaft length approx. 17 mm
Shaft diameter 5 mm
Weight approx. 168 g
Recommended propellers,Order No. 1335.36.24 9.6 ... 12V or 1360.28.20 12 ... 14.4V
Propeller adaptor 1141
Flex-hub -
Motor mount*** 1744
All-up model approx. 1500 g
Recommended speed controller Compact Control 40 2884
* Referred to operating voltage range. These values reflect the current state of technology, and may vary in the course of continued development.
Differences may occur according to the speed controllerused.
** with press-fitted pinion
*** especially for power models