dkshema
rrProfessor
Location: Cedar Rapids, IA
| That should be a good starting point. The nice thing about the pinions is they are cheap and relatively easy to swap out as you get more into things.
As an aside, my wife bought me a B&B Products DPR-50 (digital power recorder) a couple of years ago for Christmas. It goes between the battery pack and ESC, and records current and voltage (downloaded to a PC later for analysis) during flight. It is a handy device for checking your power system and its performance as you select pinions and such. It is small, weighs a few ounces, and is a neat little tool.
The 50-amp version is no longer sold, it's been replaced with units capable of 100 or more amps.
Plots look like this (this was recorded while hovering my Kyosho EP400 a couple of years ago):
http://www.bnbproducts.com/
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As for pinions, the cool thing about Robinson Racing or HPI -- is that there are pinions available from something like 16 teeth up to 44, in one-tooth increments. Makes fine-tuning quick and easy. Kyosho only has a limited number of different pinions available.
There is a point where if you get too large a pinion (too many teeth/too low a motor KV) that the pinion will no longer fit in the heli, so there is a physical limit to how large a pinion you can use.
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* Making the World a Better Place -- One Helicopter at a time! *
Dave |
