Graupner,ULTRA 3300-7H,6362

ULTRA 3300-7H Graupner 6362 These motors are fitted with a radial fan. The cooling air is routed through the motor over the commutator to dissipate a large proportion of the heat produced there. The consumption of the fan is insignificant. The fan greatly reduces or eliminates the cooling-off phase between two flights. These motors are also suitable for flying models and boats where cooling by a fan seems to be advantageous. Operating voltage range: In the helicopter application the motors are operated at much higher voltage than is stated in the table for operating voltage range: ULTRA 1600-8H at 28,8 V,
ULTRA 3300-7H at 36 V.

All ULTRA motors are delivered with a connecting lead (95 mm long, 2.5 mm² Ø).

Nominal voltage 18 V
Operation voltage range 8,4 ... 20 V
No-load speed 13400 min–1
Speed at max. effic. 11600 min–1
Torque at max. effic. 17 Ncm
Shaft power at max. efficiency 252 W
Current at max. efficiency 14 A
Stall current drain 144 A
Max. efficiency without gearbox 84 %
Case length with fan (excl. shaft) 104 mm
Supplementary width of the case 11,5 mm
Case diameter 45 mm
Free shaft length 25 mm
Shaft diameter 5 mm
Weight incl. fan approx. 445 g