Mike Bontoft
Well-Known Member
- Joined
- Nov 22, 2002
- Messages
- 415
I am looking for advice on which motor would be best to use as a starter motor for this engine. I have this Lehner 2280 673KV but it is of course way overkill and too large and heavy. I think I would like to stay with a brushless motor so I do not have to worry about brushes and maintenance. The starter belt gear ratio is 4.4. As set up here I have a 2S 5400 pack and a fairly hefty speed control I had on hand. The engine is 30cc. 500 to 600 cranking RPM makes a quick job starting it.
I am looking to put together the smallest and lightest setup possible within reason. For the 600 RPM cranking I am setting the servo driver to about half throttle.
I could build a small reduction box on the front of the brushless motor to increase torque but if there is something out there small with a very low KV I can direct drive with the torque required that would be great. As a note the engine is very low compression ratio and rotates easily. From very crude measurements pulling less than 20amps with this setup. Thanks
I am looking to put together the smallest and lightest setup possible within reason. For the 600 RPM cranking I am setting the servo driver to about half throttle.
I could build a small reduction box on the front of the brushless motor to increase torque but if there is something out there small with a very low KV I can direct drive with the torque required that would be great. As a note the engine is very low compression ratio and rotates easily. From very crude measurements pulling less than 20amps with this setup. Thanks
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