1. What head speed are you shooting for? (usually 600 size 2 blade scale 1350-1400)
2. How many teeth on the main gear?
3. What battery power, 6S, 8s, 10s, 12s....?
Then we can help sort you out.
Cheers.
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1:5 BK-117 - 1:4 MD500E - 700 MD500E - 700 B222
- TREX 600ESP
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