A Sealed, Adjustable Weight System, Designed For MONO Hulls

Discussion in 'Gas Boats Forum' started by Jim Allen, Jun 5, 2019.

intlwaters.com

Help Support intlwaters.com:

  1. Jun 5, 2019 #1

    Jim Allen

    Jim Allen

    Jim Allen

    Well-Known Member

    Joined:
    Jun 7, 2005
    Messages:
    1,486
    Location:
    Graham, NC
    The simple adjustable weight system shown was added to an AC Slayer 49" Mono which uses a 35 cc Zenoah & a Performance Unlimited tuned pipe. The hull could not be balanced to the designed balance point, 17.5" from the transom, after adding the 3 " diameter, 11 degree baffle tuned pipe & muffler. This was after moving the engine, radio box, fuel supply, etc., as far forward as possible. By placing the newly designed weight cavity 16.5" forward of the designed balance point, a single 4 ounce brass weight balanced the hull. The cavity, made from a 2.000" ID X 3.350" deep tin can, which is epoxied in place, could hold three .750" thick weights with a maximum OD of 1.760". These removable weights are sitting on the same size .625" carbon fiber rod used on the cat's weight system. This rod is threaded into a glued in PVC base plate with a 58/11 nylon thread, & it is removable. The machined PVC cap is located on the ID of the .625" OD carbon rod & the ID of the tin can cavity. Radio box tape is used to seal the machined PVC cap. The entire system was made in less than I day.

    We will be testing the system this Friday & Saturday, 6/8 & 6/9, 2019 at the Suffolk, Va site.

    Jim Allen
     

    Attached Files:

  2. Jun 6, 2019 #2

    Gilbert Pun

    Gilbert Pun

    Gilbert Pun

    Well-Known Member

    Joined:
    Aug 30, 2008
    Messages:
    510
    Location:
    Hong Kong SAR China
    Like the way you check CG
     
  3. Jun 6, 2019 #3

    Jim Allen

    Jim Allen

    Jim Allen

    Well-Known Member

    Joined:
    Jun 7, 2005
    Messages:
    1,486
    Location:
    Graham, NC
    I have a better system that can be used on the inside & outside of different type hulls. It uses flat sided 5/16" OD steel pins mounted in a 1/8" thick, moveable in & out, carbon fiber plate. The top piece is a carbon fiber tube.

    JA
     
    Gilbert Pun likes this.

Share This Page



arrow_white