Graupner,COMPACT 340 7,2 V,6520

COMPACT 340 7,2 V Graupner 6520 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 7.2 V
Operating voltage range 6 ... 12 V
No-load speed 7700
Revolutions / Volt 1070
No. of winds 18.5
Current drain at max. efficiency* 18 ... 26 A
Max. efficiency excluding gearbox 83 %
Permissible directions of rotation R and L
No. of poles 14
Overall length 60 mm
Case length excl. shaft approx. 34 mm
Diameter 42.5 mm
Free shaft length approx. 17 mm
Shaft diameter 5 mm
Weight approx. 133 g
Recommended propellers,Order No. 2945.28.12 7.2V or 2945.25.12 8.4 ... 9.6V
Propeller adaptor 1141
Flex-hub -
Motor mount*** 1744
All-up model approx. 1250 g
Recommended speed controller Compact Control 30 2883
* 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 controller used.
** with press-fitted pinion
*** especially for power models