BRUSHLESS DR. SPEED4,5T star Graupner 97254

BRUSHLESS DR. SPEED4,5T star Graupner 97254 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 openingsmaintain 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. This means that the annoying sensor leads can be eliminated for even higher reliability
Variable sensor timing
High-performance ballraces for high revuluttions
The motors comply with DMC rules and EFRA rules.

Nominal voltage: 7.2 V
Operating voltage range: 4.8 ... 7.4 V
Revs. / Volt (kV) approx. 8300
Winding count: 4.5T triangular pattern
Current drain at max. efficiency approx. @ 7.2 V: 70 A
Current drain at max. power approx. @ 7.2 V: 135 A
Max. power at 7.2 V: 505 W
Max. power at 6 V: 370 W
Max. power at 4.8 V: 240 W
Permissible motor direction: R and L
No. of poles: 2
Overall length approx. 70 mm
Case length approx. 52.5 mm
Diameter approx. 35.8 mm
Free shaft length approx. 15 mm
Shaft diameter at output approx. 3.175 mm
Weight approx. 180 g
Recommended reduction ratio with six cells: 1:10 model cars, TW 1:7 - 1:10, 4 WD 1:13 - 1:15
Recommended speed controllers: GM-GENIUS 95