Twin Jolly / Ammos/ 4S, what props ?

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  • G Doggett
    Senior Member
    • Apr 2007
    • 446

    #16
    Although the weather was pretty borderline, rain, wind, waves as usual, I got to give the Jolly a short test run and she is transformed.
    Getting rid of those 24 cells has made a huge difference, and the Ammos have heaps of power and hardly got hot with the Graupner K40s.
    The props are spinning inwards but I didn't get a chance to see if spinning outwards made any difference.
    The c/g is now at 30% and she rides on just the rear of the sponsons as recommended by Jay.
    Of course with the wind and waves I managed to flip her over backwards into the wind, but I came to the conclusion ages ago that this is a flat water only boat.
    The reduced weight make for some impressive wheel stands so you have to be gentle on the throttle
    She still porpoises a bit at about half speed but it is now possible to drive through this and she then flattens out and goes for it.
    If we ever get some flat water I will try a SAW with the gps.

    Has anybody else on this forum got a twin Jolly going yet? I would be interested in your set up.

    Graham.
    Last edited by G Doggett; 04-26-2008, 11:12 PM.

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    • Mich. Maniac
      Banned
      • Apr 2007
      • 1384

      #17
      So you went with the Ammo motors? I thought you werent cause all we gave you was un-educated guessing for advise. Quite a chance taker with such a nice boat. Wonder what your amps were? Like you say maybe with some flat water you can get some more open throttle runs and check temps. good luck.

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      • G Doggett
        Senior Member
        • Apr 2007
        • 446

        #18
        Yeah I decided it was time to 'suck it and see' with the Ammos since real info is so thin on the ground.
        I only did short runs and then checked temps etc - everything was fine.
        Some more experimenting is needed with c/g and prop rotation but I am now happy with the way she goes at last.
        I think I will get an Eagle Tree from OSE to eliminate the guess work on all my FE boats. If using it saves one ESC, motor or battery pack it has paid for itself.
        Graham.

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        • crazzy maxx
          Senior Member
          • Dec 2007
          • 498

          #19
          VIDEO!!!!
          got any gps speed for us?
          snort pixi sticks=symptoms-:

          Comment

          • G Doggett
            Senior Member
            • Apr 2007
            • 446

            #20
            No videos or gps yet Crazymax,
            I am waiting until my Eagle Tree turns up so I can measure speed and amp draw together and eliminate all the guesswork.
            Graham.

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