Prop size

Prop size

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24 November 2015 at 07:14 #61537
Wayne Clarke
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@wayneclarke38583
I have built an astra mm 2404 wooden offshore racer.It is fitted with a 36×50 800 watt dynamite brushless motor. I am going to use a 4000 ma 4 cell lipo battery.not sure yet what size esc but my main worry is , is a 40 mm prop too big or should I go smaller? All advice welcome, new to electric boats and i am unsure but slowly making progress
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24 November 2015 at 07:14 #2526
Wayne Clarke
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@wayneclarke38583
24 November 2015 at 15:31 #61545
Dodgy Geezer 1
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@dodgygeezer1
The optimum propeller for a boat is almost impossible to predict, and I find it's well worth buying a selection of cheap nylon props of different sizes so you can try out the various permutations on the lake..
25 November 2015 at 07:16 #61548
harry smith 1
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@harrysmith1
Hi Wayne

A 40mm prop is a good start or a 3blade 37mm.

I started with a 800 watt(1100KV) on 3s, up it to 4s with a 40mm prop.

Changed to 1600 watt (1450kv) on 4S with the same prop.

Goes like it's bin stolen!!!!!

As for ESC go for 100 amp, a bit of room to up grade the motor if required(save buying another ESC later).

Harry
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