Graupner,COMPACT 300 7,2 V,7708

COMPACT 300 7,2 V Graupner 7708 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 7.2 V
Operating voltage range 7.2 ... 12 V
No-load speed 6050
Revs. / Volt 840
No. of winds 26
Current drain at max. efficiency* 6 ... 10 A
Maximum efficiency 86%
Permissible direction R and L
No. of poles 14
Overall length approx. 42 mm
Case length, excl. shaft 30 mm
Diameter approx. 27.7 mm
Free shaft length approx. 12 mm
Shaft diameter 3.17 mm
Weight approx. 57 g
Recommended propellers 2945-28.12 7.2V or 2945.23.12 9.6 ... 12V
Propeller adaptor 7690.3
Flexi-hub 7690.1
Motor mount*** 7690.2
All-up model weight approx. 300 g
Recommended speedcontroller Compact Control 8 2893 or Compact Control 10 2873 or Genius 3 2895
* 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 speedcontroller used.
** with press-fitted pinion.
*** especially for power models.