Kyosho Viper 2 Help with a new Motor and ESC set up

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  • mugg
    Junior Member
    • May 2015
    • 1

    #1

    Kyosho Viper 2 Help with a new Motor and ESC set up

    Hello everyone, My name is Fred I'm from NE Ohio. I have wanted an RC Boat for a long time. We have a nice small calm lake/ large pond here to run the boat on.

    I went to the Hobby shop looking for a good forward reverse brushed speed control and came home with a Sidewinder 3 4600 motor with ESC that the hobby shop recommended. Needless to say after some research, a motor with that high of an rpm does not work. The first 7.2V battery had a decent run and on the second run the speed control kept cutting out and it was not even warm. I know very little about boats and the hobby shops around here know even less, because they only sell 2 boats a year. The Sidewinder 3 system was returned.

    I have grown attached to My vintage plastic and would like to pick the best set up within the following constraints.

    NiMH or NiCD 1 to 16 cells. I have assembled my own packs and have lots of these.
    4S Lipo's and a new charger in the near future.

    The boat is 25"
    I would guess that it is an ABS plastic hull.
    1095 grams with the old Castle Sidewinder 3 set up installed and no batteries.
    the boat can comfortably fit two 6 to 8 cell packs in a series or parallel.
    The stock prop is an plastic Octura X431 and the largest prop can be is 35mm without major surgery.
    I like the plastic props for simplicity, but have the materials and skill to polish and balance a metal prop.
    The prop sits below the boat. The drive shaft is straight 4mm with an 1/8" end for the prop. The drive shaft is in a greased brass tube. The motor coupler is round aluminum stock 3mm at the motor end 4mm at the drive shaft with set screws.
    The rudder is plastic, but it is larger and taller than most of the ones I have seen.
    There are no trim tabs, turn fins, or water cooling installed, but that is the first thing that will be addressed. This boat jumps up easily and I need to get the nose down a bit. I'm guessing trim tabs will help.
    The original motor was a standard 540 sized brushed motor with an on and off switch connected to a servo as a speed control. The on and off switch idea sucks.

    I would like to pick a system that would be reliable, if that is possible.

    I'm adding a You tube video link of what is possible with the Viper if it's dialed in. I'm not sure what they used, But I would love to get mine to run that well. "RC Boat Kyosho Viper with 4S" https://www.youtube.com/watch?v=x_j25Hhqebg
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