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Thread: ESC Recommendations

  1. #1
    Join Date
    Jun 2012
    Location
    Ca
    Posts
    3

    Default ESC Recommendations

    I have a 49" aeromarine donzi that I am converting gas to electric, I plan to run 8s only in this boat. I have this motor

    https://www.ebay.com/itm/56112-B-Bru...Td40mNq2gw9bmA

    KV: 780KV
    Max power: 7350W
    Poles number: 4
    Max voltage (LiPo): 9S (780Kv)
    Max Amps: 195A (780Kv)
    No load current: 2.8A (780Kv)
    Diameter: 56mm
    Length: 112mm

    Propeller will be octura x457.

    Will a Swordfish X+ 200A ESC work with this setup? My goal is 50MPH.

    Any suggestions appreciated.

  2. #2
    Join Date
    Mar 2011
    Location
    BC
    Posts
    7,328

    Default

    I would run a SW 240 myself. There shouldn?t be anything wrong with 8s in that boat. Just make sure you run 8s2p, or 8s 10,000mah or more.


    BTW, is this your first FE boat?

    Shawn

  3. #3
    Join Date
    Feb 2008
    Location
    GB
    Posts
    2,303

    Default

    8s in a 49 inch heavy gas converted mono smells like unnecessarily high amp draw to me, unless you are confined to 8s by class rules I would use a higher voltage to reduce the amp draw at a given speed.
    Paul "tug Killer" Upton-Taylor, Cat lover.
    FastElectricBoats.co.uk

  4. #4
    Join Date
    Mar 2009
    Location
    OH
    Posts
    1,426

    Default

    Goal is only 50. He won?t be pulling a lot of amps. That set up with the right prop should work.


    Sent from my iPhone using Tapatalk

  5. #5
    Join Date
    Apr 2007
    Location
    AZ
    Posts
    7,627

    Default

    The x457 prop is very small for that setup, amp draw should be relatively low. 8S gas boats with 800-850 Kv motors normally run props in the 65-70 mm range, that’s a 50% increase in the thrust cone area. How efficient that prop will be on such a large draggy boat is the real question, will it be able to reach 50 mph? All those strakes should help. I assume it is a full surface drive boat.


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  6. #6
    Join Date
    Jun 2012
    Location
    Ca
    Posts
    3

    Default

    This is my first large gas to electric conversion boat, Im coming from 1/5 scale electric cars.
    I am limited to 8s due to motor and would prefer to stay at 8s so I wouldn't have to purchase any more batteries.

    Which prop would you recommend then?

    Thanks.

  7. #7
    Join Date
    Mar 2009
    Location
    OH
    Posts
    1,426

    Default

    Start with the 457. See how it goes.
    I think you will be surprised.


    Sent from my iPhone using Tapatalk

  8. #8
    Join Date
    Apr 2007
    Location
    ON
    Posts
    2,238

    Default

    What batteries do you have now?
    # of cells, -- mHa, -- "C" rating, --- Make?

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  9. #9
    Join Date
    Jun 2012
    Location
    Ca
    Posts
    3

    Default

    4x 4s 7200mah gensace 70c in 8s2p 14400mah total

  10. #10
    Join Date
    Mar 2011
    Location
    BC
    Posts
    7,328

    Default

    Quote Originally Posted by photohoward1 View Post
    Start with the 457. See how it goes.
    I think you will be surprised.


    Sent from my iPhone using Tapatalk
    Agreed Howard, I think I may only have a 455(or less) on this 45” Dumas (600kv 12s)

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