Outboard bracket design engineer wanted

Discussion in 'Boat Design' started by jasonvi, Apr 5, 2019.

  1. jasonvi
    Joined: Oct 2016
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    jasonvi Junior Member

    I’m converting a 48 Fountain Express Cruiser to outboards, and would like to improve upon an existing outboard bracket design (to allow installation of jack plates). Could anyone recommend an engineer to hire as a consultant to my fabricator? Apologies in advance if this is the wrong forum, but it seemed most appropriate.
    Thanks in advance for any assistance!
     
  2. Dejay
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    Dejay Senior Newbie

  3. Mr Efficiency
    Joined: Oct 2010
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    Mr Efficiency Senior Member

    What prevents installation of a jacking plate on the existing pod designs ?
     
  4. jasonvi
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    jasonvi Junior Member

    I don’t know if the additional torque/lever arm exceeds the structural tolerances of the bracket or if the greater effective length of the bracket warrants a change in the knee brace reinforcement of the hull/transom.
     
  5. Mr Efficiency
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    Mr Efficiency Senior Member

    Are there any jacking plates that don't increase the set-back that much, for it to be a concern ?
     
  6. Angélique
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    Angélique aka Angel (only by name)

    See — hydraulic outboard jack platehydraulic outboard bracket — pick the vertical sliding ones, and to save on aft weight best go for aluminium construction I think.

    example: 5'' setback, 6'' vertical lift, max 400 Hp, 68 pounds, aluminium
    [​IMG]
    (example pic source)
     
    Last edited: Apr 5, 2019
  7. jasonvi
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    jasonvi Junior Member

    Would like to use one with a 6” setback (minimum I’ve found is 4”). Given the length of the bracket (see attached photos) the additional weight/length may be insignificant, but I favor proceeding with an abundance of caution....
     

    Attached Files:

  8. Mr Efficiency
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    Mr Efficiency Senior Member

    With a 48 foot boat, I think the weight of a jacking plate(s) would be no problem, and with the vertical type Angelique illustrated, you setback won't be much of an issue either. Maybe select a bracket that is a little shorter, if available, so your jacking plate does not make for too much setback.
     
  9. Angélique
    Joined: Feb 2009
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    Location: Belgium ⇄ The Netherlands

    Angélique aka Angel (only by name)

    I see 7 × a Fountain 48 Express Cruiser offered on Yachtworld right now, 5 × a triple diesel inboard, 1 × a twin diesel inboard, and 1 × with quadruple 350 Hp outboards, the latter can be checked out for specs and set up . . .

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
    Last edited: Apr 6, 2019

  10. jasonvi
    Joined: Oct 2016
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    Location: Michigan USA

    jasonvi Junior Member

    Thanks for the input—all set now!
     
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