prop and motor selection for aeromarine sprint 29

[brons101]

got a new hull and associated parts for it coming, 30inch x 11 aeromarine catamaran. im trying to pick a motor for it ,

i want to get in the mid 50s (mph) but higher is better on 4s if possible, should i get a 4074 in 1800kv or 2000kv? and what prop for what kv? x442? x642?

i might try out 6s just for fun occasionally so im thinking the 1800kv is better (but still pretty high rpm) but then what prop would i use to get to the mid 50s when i switch back to 4s using the 1800kv motor?


if you guys could share your opinions and help me out that would be sweet.

thanks












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