Please help with prop

[Jirka]

Hello everybody I build Cat boat 53", dual leopard 4092 1520kv, esc 150A, 6s lipo pack 5200mAh 70C. Wich prop Will be TOP for this setup?

Thank you for your answer. And sorry for my bad english😉

[Bande1]

1814...big maybe 1914... because you should expect to go fairly slow.

[Jirka]

Thanks for the answer, I know that with these engines it will never be a fast boat, this will probably be the best choice for lipol and esc temperature. I tried a three bladed 48mm 1.4 lift propeller and that was too much for my lipol. Although I reached a speed of 105 km/h, everything was too hot. Wouldn't it be better to use an esc that can handle 8s and ride that setting to gain speed? Thanks so much everyone for any advice. I know it would be better to use 56102 motors but that is beyond my budget.

[Bande1]

The KV is far too high for that size of boat. 8s would be better and get you into the mid 50's mph range safely. you need an RPM in the 18k-20k range so that you can use large props....because its a large boat. 1520 on 6s is pretty hot for anything over 34 inches. and a tad silly for a 53" boat.

ideally 8s with about 850kv and run like 2316 props.

for now you should turn the timing down to about 3-7 degrees and prop for about 45mph

[Jirka]

Thank you for the answer, I'm slowly starting to get my bearings in the ships. What would be the best set of components for such a large ship for speeds of around 90mp/h? I would like to know what to save on..

[Bande1]

for a straight line speed about 13,000-15,000w.

2 castle XLX2's
2 TP 4070 motors

you will have to push 300-350 amps on 6s each motor.

or 1 SSS 56123 on 12s with a flier 400A esc.

[Jirka]

I still have a question if I go the cheap route with the sss 5684 1000kw esc promarine 300a motors on the 6s will it work? 48mm lift 1.6 or 48mm lift 1.8 propellers, will it take 3/16" shafts? What is the maximum weight such a boat can have, my fiberglass homemade production is quite heavy..

[Jirka]

This is my boat..