1. Home
  2. ✈ RC aircraft models
  3. HELP!!!!!!!!GRAUPNER 400 4.8V

HELP!!!!!!!!GRAUPNER 400 4.8V

hi guys, i'm an electronics undergrad and building a microcontrolled model, i bought some graupner motors from local model shop and intend to use them as direct drives for wheels, i.e., stick wheels on the shafts. i've tried this and they are not very powerful, they struggle to get going, once going unbelievable speed. has anybody had experience of trying to use them for direct wheel drive or has anybody any ideas to improve the initial torque? would the gearbox's solve the problem?

best regards

shaun

Reply to
Electromechy1
Loading thread data ...

I doubt that you will have much luck with using them for direct drive wheels. A speed 400 motor doesn't have the torque needed to turn the wheels at low rpm. The best bet would be to build a small gearbox.

Reply to
Normen Strobel

Yea, if top speed isn't much of a concern, use a bolt on 3:1 gear drive. It should still sing right along, though!

Reply to
Paul McIntosh

Yes, to the last suggestion. A vey big ratio gearbox!!!

If ultinmate power os not teh issue, get the 7.2v motors and gear about 6:1.

GWS make useful boxes - see

formatting link
for loads of boxes.

Reply to
The Natural Philosopher

thanx guys, ordered some 4:1 ratio inline g/box's only £12 for the pair, much less than i thought, should arrive tomorrow.

best regards

shaun

Reply to
Electromechy1

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.