Graupner New Items 2008

Electric motors
GRAUPNER COMPACT motors BRUSHLESS
Dr. SPEED motors
Included in Order No. 7741
and 7742
COMPACT 215 7,4 V
Order No. 7741
COMPACT 225 7,4 V
Order No. 7742
Ultra-small, high-performance GRAUPNER
COMPACT motors for Depron model
aircraft. Supplied with two O-rings for
propeller mounting.
COMPACT 920Z 44,4 V
Order No. 7781
Extremely large, high-performance
GRAUPNER COMPACT motor for RC
model aircraft with wingspans of around
2500 mm and larger, such as the TURBO
Raven; requires a 44.4 V flight battery.
184 New Items ’08
Included in Order No. 7781
7741
7742
GRAUPNER COMPACT 305 7,4 V
Order No. 7733
Very high-revving GRAUPNER
COMPACT motor, suitable for fast
model aircraft and model helicopters.
7781
7733
With the new BRUSHLESS Dr. SPEED
motors GM-Racing has succeeded in
developing highly efficient motors which
set new standards in terms of reliability
and power.
● Multiple extra-thick windings together
with extremely low-loss construction
and sintered neodymium magnets for
enormous power and high efficiency
● A thicker shaft ensures more accurate
true-running of the magnets
● Cooling openings maintain favourable
motor temperatures even under
ultra-harsh competition conditions
● BRUSHLESS Dr. SPEED motors
feature sensors and a sensor
connector, and can therefore be
operated with GM-Genius speed
controllers with and without sensors.
Specification
Type
Order No.
Nominal Voltage
Operating voltage range
Revs. / Volt (kV) approx.
Winding count
Current drain at max. efficiency approx. @ 7.2
Current drain at max. power approx. @ 7.2
Max. power at 7,2 V
Max. power at 6 V
Max. power at 4,8 V
Permissible motor direction
No. of poles
Overall length approx.
Case length approx.
Diameter approx.
Free shaft length approx.
Shaft diameter at output approx.
Weight approx.
Recommended reduction ratio with six cells
Recommended speed controllers