Speed 900 - Viper 900

interessanter preis fuhr so ein motor.

Du meinst die von den Entstörkondensatoren? Ja.....

Ist das der gleiche Motor, wie oben vorgestellt?:

http://www.hopf-modelltechnik.de/product_info.p…ae00ec751849007

The weight is the same as the speed 900.
RPM/V is a bit higher, about 25% higher than the 900 advertised.
The axle diameter is bigger, as the 900/Viper use a 6mm axle. But 6.3mm is also 1/4inch.

I have opened vipers and 900's, and found the same internals. Maybe there is a difference in the windings, but I couldn't see that.

I suspect this is the same Johnson motor as the 900 but build for the US market.

Thanks for the Information.
Where can I buy the Viper 900xxl?

German:
Danke für die Information,
wo kann ich die Viper 900xxl Motoren kaufen?

Naja, Madox meint ja dieser Motor hat 25% mehr drehzahl, das ist doch ein Nachteil oder?

A higher RPM doesn't mean a disadvantage. But it will take a larger reduction gearing to get it down to what you want/need.

I dont think it will make much difference if you use the same motor on the same gearing as a Graupner speed 900 bb torque. your robot will be faster, but still have heaps of power left, more than a regular 12kg robot can put on the floor.