Graupner,COMPACT 555 20 V,7716

COMPACT 555 20 V Graupner 7716 GRAUPNER COMPACT BRUSHLESS motors.
A range of high-performance BRUSHLESS motors. The impressive feature of this series of power plants is their enormously high torque, and it is in direct-drive applications that they show their full power potential. GRAUPNER COMPACT motors are brushless external-rotor (out-runner) types, i.e. the outer motor jacket rotates and drives the motor shaft. This design principle resultsin ultra-compact electric motors capable of an outstanding performance without recourse to a gearbox. An additional advantage: the weight of GRAUPNER COMPACT motors is very low compared to that of conventional motors.

Ultra-light GRAUPNER COMPACT motors with weights below 45 g, i.e. less than a SPEED 300 electric motor, and therefore an excellent choice for lightweight Depron or Styrofoam models. The preferred energy source is a 2-cell or 3-cell Li-Po pack.

Nominal voltage 20 V
Operating voltage range 19.2 ... 24 V
No-load speed 10,200
Revs. / Volt 510
No. of winds 18
Current drain at max. efficiency* 15 ... 40 A
Maximum efficiency 88%
Permissible direction of rotation R and L
No. of poles 14
Overall length approx. 74.5 mm
Case length, excl. shaft 55.5 mm
Diameter approx. 49.8 mm
Free shaft length approx. 19 mm
Shaft diameter 6 mm
Weight approx. 320 g
Recommended propellers,Order No. 6045.6 and 1336.36.24 19.2 ... 24V
Propeller adaptor 7690.7
Flex-hub -
Motor mount*** 7690.6
All-up weight approx. 3000 g
Recommended speed controller Compact Control 50 2885 or Compact Control 80 2892 or Genius 70 2897
* 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.