Model Boat Mayhem
Technical, Techniques, Hints, and Tips => BRUSHLESS Motors and Speed Controllers => Topic started by: sigfortunata on September 24, 2017, 10:43:34 pm
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Just general question really.
Through necessity I have a Turnigy D2826/6 motor rated at 2200kv in an aerokits Sea Hornet. It was a temporary fit not planned.
I run it on a 3S lipo. The boat is quick but the motor gets really hot ( not smoking hot) just too hot to comfortably hold but I would expect this as its not really fit for purpose.
So I want to fit a more suitable motor. Originally it had a 3536 ???turns 1000kv on 14.8v but I've came to realise that was TOO big. (I hit a buoy flat out, the boat took off, flipped and promptly sank which is what ruined the motor necessitating the temporary fit)
So I'm looking at a 3530/14 1100kv which will clearly develop more torque and enough speed but will it run cooler?
I don't know, suggestions, view all welcome
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Could you try a slightly smaller propeller? Less load = less amps= less heat.
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Hi Chas
I have dropped the prop size from 35 to 30mm, forgot to mention I did that as a matter of course, sorry.
The fitted motor is really just not suitable, it was intended for an airboat project and I wanted high KV, I need to change it out rather then compromise to make it work, smaller prop, dropping a battery cell etc
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Hi sigfortunata
I am running a B28-57-15L 1900kv on 3S with a 45Amp car ESC and a 2 blade 32mm 1.4 pitch prop.
Also my mate is running the same setup, but with a B28-57-17L 1700kv.
Both are in Aerokits Sea Hornets.
My 1900kv has an air scoop on the engine hatch with an outlet under the rear dash.
No ware cooling!!!
Canabus
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Try 1000kv at 7.4v, but the slightly bigger prop. I think torque is your friend in the thicker environment of water rather than air.
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Thank you gentlemen :-))