Yamato Props

Discussion in 'Propulsion' started by Lou, Feb 26, 2015.

  1. Lou

    Lou It's just toy boats -->> C T D <<-- Admiral (Supporter)

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    What size props and pitch recommended (only powering inboard props). Also, if going with brushless recommendation on brushless motors?
     
  2. Bob

    Bob Well-Known Member

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    I'd say 2" or 2 1/4".
    If you go brushless get something that's bigger than a brushed 500 motor.
    If you want to get real crazy go 2 1.4" 5 blade with a big brushless motor.
     
  3. Lou

    Lou It's just toy boats -->> C T D <<-- Admiral (Supporter)

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    More important to stop/start then worry about turning with this beast?

    From Strike site, looks like this is intended for the yammer?
    2.25 inch Pair (counter-rotating, for 3/16" shaft)
     
  4. thegeek

    thegeek Well-Known Member

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    I ran 2.5" with 970 motors.(brushed)

    Brushless motors have so much more available power, and that is a issue for the drive-line parts.
    You can snap a dogbone in two easy with a brushless motor.
    So I only go direct through a gearbox of some sort (no dog bone or coupling), beefy setscrews locktite and such just to keep it in.

    Here are photos of the gearbox in my biz. with a turnigy 4258-400
     

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    Last edited: Feb 26, 2015
  5. Lou

    Lou It's just toy boats -->> C T D <<-- Admiral (Supporter)

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    Carl,

    is that an outrunner? If so, does being submerged affect the motors (resistance)?
     
  6. thegeek

    thegeek Well-Known Member

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    Yes it is a outrunner.
    Maybe but I don't think the water gets that high unless you don't pump, it has a tunnel under the motor for water to pass.
     
  7. HTMills

    HTMills Awesome Member

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    On my Yamato I'm using 1.3" x 1.5" 3 blade props on a 3/16" shaft still monkeying around with different 700 motors to get the right RPM for max efficiency at speed. Present motors are out of used dewalt drils. Not really sure if this helps. mine is going on a big gun ship and reversing is not allowed on open water. I'm also trying out an Action P40C motor rudder mixer with all 4 props
     
    Last edited: Feb 27, 2015
  8. CURT

    CURT Well-Known Member

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    On my Yamato I used a pair of Johnson 550 brushed motors on a Traaxxis gear mount system. 1/8 in brass shaft. Used 2.25 inch Dia 25 pitch 4 or 5 blade props. I used both actually at different times in the model's career. The motors were 6-12 volts run at 6 volts. I ran cooling coils around the cans of the motors and installed pickup tubes which kept the motors cool. The Musashi ran 2.25 in props
    4 blade with a flat pitch. He used 6-12 volt motors on 6 volts BC gears . Neither of us used ESCs for FG battle. Just max displacement and large drag props. Both of our models ran several several years like this in battles and running around successfully.
     
  9. ProfessorChaos

    ProfessorChaos Active Member

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    I have Prop Shop 2" 5 blade props with Johnson 600 motors on mine.