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  1. #1

    Join Date
    Nov 2009
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    Birkirkara, MALTA
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    Water cooling for scale motor boats

    Hi all, i'm about to start building my Chris Craft Constellation kit by Lindberg. I am swapping the brushed motors to 1100kv brushless on 2 or 3 cell lipo. I plan to use watercooled mounts for the outrunner motors. Thing is, this is a slow boat and i dont think i can rely on forward movement to build enough water pressure. Do you guys ever use a small water pump to give a continuous flow, even when stationary? Something like a windscreen washer pump maybe?

  2. #2

    Join Date
    Nov 2004
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    Marysville, WA
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    Many boats have that set up, especially on a clutched IC engine. One thing you might try is to put a pickup in the thrust cone behind the prop
    Sig Brotherhood #68
    Sig Kadet Brotherhood #196
    Prolific sport and scale hydroplane builder and all around hydro maniac

  3. #3
    Here's the pump I am using on my new Dumas Tuna Clipper. I am using two of them, one for the motor (Turnigy 3660-2050 brushless), one for the ESC (Turnigy 160 amp water cooled).

    http://www.amazon.com/Lightobject-EW...ilpage_o02_s00

    Use these to make it look nicer. There's better ones, but these will fit the look of the stainless steel hardware I'm using in the rest of the boat. I'm using them for both inlets and outlets.

    http://www.amazon.com/Thread-Inner-A...ilpage_o02_s00

  4. #4
    Hi Chris
    I use Hobbyking 35mm outrunners with and without engine water cooling mounts(3639-750,3639-1100,D3548/4-1100 and 3648-1450kv) the motors will only get hot if you run too larger prop(a 40mm 2blade or 37mm 3blade are OK).
    The 3639-750 have 600watts of power and one of our club members has a twin setup in his boat which is 43 inches long.
    No water cooling, car ESCs and two 5800 3S batteries, the top speed is a bit pass the scale speed so he runs at 3/4 throttle.
    As for ESCs I use the Hobbyking car 60 and 100A because they have an electric fan on top also no plumbing required.
    I use these on 3S and 4S batteries.
    I program(programming required) the ESC with 25% reverse, no braking and start power of 10%(very good slow speed)


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