ULTRA 220/30/A3 P48 V Graupner 6386 Comparable with the proven ULTRA 930/6 in terms of torque and rotational speed, this motor weighs only around 240 g and offers significantly higher efficiency. The motor is an excellent choice for direct-drive applications in small power models with 8 - 10 cells and propeller sizes of 20 x 12 cm to 23 x 15 cm. It is also suitable for small powered gliders with 8 cells and propeller sizes of 25 x 15 cm to 30 x 18 cm,and impellers running on 14 to 16 cells. This range of ULTRA motors incorporates all the latest technical advances plus experience from hard competition usage, with the result that the motors reflect the highest possible level of technical development. A new type of high-efficiency metal plate material has been developed specifically for this series of motors, whose cross-section and material characteristics are selected for use at extremely high performance levels, giving an improved power:weight ratio. The planetary gears of ULTRA SENSORLESS geared motors are supported in needle roller bearings to improve the efficiency and durability of the gearbox. Nominal voltage 8 V
Operating voltage range * 8 12 V
No-load speed 14200 min-1
No-load current drain 1,5 A
Speed at max. efficiecy 12800 min-1
Torque at max. efficiency 9 Ncm
Current drain at max. efficiency 18 A
Shaft power at max. efficiency 120 W
Max. efficiency excl. gearbox 84 %
Max. efficiency incl. gearbox -
Number of poles 4
Case length excl. shaft 57,5 mm
Case diameter 37 mm
Free shaft length 23 mm
Shaft diameter 5 mm
Weight approx. 240 g
These figures represent the current state of technology, and may vary with further development. * at 1 V per cell
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