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Thread: Would a sharpened and balanced Prather 235 work for me?

  1. #1
    Join Date
    Apr 2017
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    Ny
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    143

    Default Would a sharpened and balanced Prather 235 work for me?

    Im currently running a Promarine 34" MTR on 6s. The original motor was a 3674 2075kv SSS and a 120a Seaking. I was told the stock prop is pretty close to an X442. With the stock set up the maunfacturer said an X445 is about the limit. Ive upgraded the esc to a Seaking 180a and just purchased a Leopard 4082 1600kv. Im in the process of reinforcing the hull. I picked up a few Prather 235's for future use and was wondering if a prop this large would be ok on the above set up. Boats purpose is for sporting, and speed passes, no organized racing. Thanks to all.

  2. #2
    Join Date
    May 2017
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    OK
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    Default

    That’s 35,000rpm’s... And that’s a pretty big wheel. I would start with a 225 and check temps.

  3. #3
    Join Date
    Jul 2016
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    IL
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    4,100

    Default

    The Prather 235 is nearly 51mm in diameter and a 1.6 pitch ratio, which is like an octura x651 if there was such a prop. As Craig said, that's a big prop.

  4. #4
    Join Date
    Apr 2017
    Location
    Ny
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    143

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    If figured it was going to be a little on the larger size for that application. Thought maybe I could get away with it if I took a little material off of the prop. Maybe I can trade one or two if them off, or just save them for a larger built later on. Thanks as always for the help guys.

  5. #5
    Join Date
    Jul 2016
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    IL
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    You can certainly cut it down to a smaller diameter and that will reduce the load on the motor, not to mention make it a more appropriate size for a hull of that size.
    Vac-U-Tug Jr (13mph)

  6. #6
    Join Date
    Apr 2017
    Location
    Ny
    Posts
    143

    Default

    Ive reviewed a few vids on how to cut them down, sharpen and balance, so I guess Ill be giving that a go one of these days. Everything still frozen over here in NY, so Ive got some time.

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