Gas engine ?

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  • l8rg8r
    Member
    • Nov 2011
    • 44

    #1

    Gas engine ?

    I'm building a large mono hull with a gas engine. On the motor mount what will happen if i don't use rubber isolators and mount the engine with solid mounts right on the stringers
  • don ferrette
    Fast Electric Addict!
    • Aug 2010
    • 1093

    #2
    Originally posted by l8rg8r
    I'm building a large mono hull with a gas engine. On the motor mount what will happen if i don't use rubber isolators and mount the engine with solid mounts right on the stringers
    The boat will vibrate itself to death, rubber isolators are a MUST on larger IC engines. Also a solid mount on a large boat hull will create a tremendous amount of hull noise, monos are the worst in that regard because of the inside shape actually magnifies the sound.
    - IMPBA Hall of Fame -
    - IMPBA Hydro Technical Director -

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    • l8rg8r
      Member
      • Nov 2011
      • 44

      #3
      Ok thanks Hess I need to find some isolators

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      • don ferrette
        Fast Electric Addict!
        • Aug 2010
        • 1093

        #4
        Originally posted by l8rg8r
        Ok thanks Hess I need to find some isolators
        Here ya go-

        Bruce is a good guy to deal with and very reasonable prices.
        - IMPBA Hall of Fame -
        - IMPBA Hydro Technical Director -

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        • gsbuickman
          Fast Electric Addict!
          • Jul 2011
          • 1292

          #5
          Come on Bro, show the guys some pics of that Prather mono your macgyvering on . you gotta love the 80's pastel pinstripe paint job ...

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          • l8rg8r
            Member
            • Nov 2011
            • 44

            #6
            image.jpgimage.jpgimage.jpgimage.jpg here's a few pics of my 42 inch mono I believe it's a Prather but not sure what it is other than cool if you know make or model I would love to here it

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            • gsbuickman
              Fast Electric Addict!
              • Jul 2011
              • 1292

              #7
              Here's some pics of the 80's pastel twins i took when you brought them over Bro :-) . they're so Miami Vice ....





              Last edited by gsbuickman; 02-04-2014, 03:11 AM.

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              • gsbuickman
                Fast Electric Addict!
                • Jul 2011
                • 1292

                #8
                Hopefully Rick will show us some pics of his motor project that he's working on for the mono. I forget what motor he said it was, but I know its a watercooled 5 HP weedeater style motor, with a lightened , balanced flywheel.

                As far as the shovel goes. It's hand built glass over wood and not something I want to run very often, so i'll keep it vintage simple. I am thinking of a 700 class Cordite with a 60v/50A Astroflight 207D on 4s pushing the 3/16 flex & Octura 1460 prop. Its primarily a shelf queen, so its all good. I wanna see what Rick cooks up to make he mono go ..... :-) .

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                • Chilli
                  Fast Electric Addict!
                  • Jan 2008
                  • 3070

                  #9
                  Originally posted by don ferrette
                  The boat will vibrate itself to death, rubber isolators are a MUST on larger IC engines. Also a solid mount on a large boat hull will create a tremendous amount of hull noise, monos are the worst in that regard because of the inside shape actually magnifies the sound.
                  Also, every screw that isnt Locktited will vibrate loose. On gas boats you have to keep an eye on loosening hardware even with rubber isolators.
                  Mike Chirillo
                  www.capitolrcmodelboats.com

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                  • l8rg8r
                    Member
                    • Nov 2011
                    • 44

                    #10
                    image.jpgimage.jpg
                    Here is a pic of what I've got done so far I milled the jug to except my redneck water jacket and lightened the flywheel I goofed on what engine I had it's not the 044 it's a stihl fs or fc 44 that's a big diif so hp I have no clue but it's 30cc I wish it was the 044 that's a 70cc with over 5 hp thanks for the lock tite tip I lock tite everything alway it's cheap insurance
                    Last edited by l8rg8r; 02-04-2014, 11:03 AM.

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