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Thread: RandyatBBY is building a Whiplash

  1. #1
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    Default RandyatBBY is building a Whiplash

    Ya you read it right. In P LTD Sport Hydro I have had been having a hard time winning so in the spirit of if you can not beat em Join em! every time I get my Frankenstein Sport Hydro going as fast as the Whiplash 20 I burn up a motor. Hence the decision.
    The Start of the build.
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
    BBY Racing

  2. #2
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    Just be up to driving skill then Randy. Your experience should get you back up front.

  3. #3
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    haha Looks like how I do it. Random crap from all over the shop for weight. Sometimes I'll have old cans of paint perched up there.
    Noisy person

  4. #4
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    Whaaaaaaaat? I never thought I'd see the day! ha!!!

    I'm still running mine! Awesome boat for P Ltd!!

  5. #5
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    Never too old to learn something. On a good day I drive well. If I am a little dizzy (blood sugar off) I can get confused as to the correct direction to turn. Not fun. I never thought I would run one either but it is a good exercise for the mind. Ya I wanted to use a POS vise but could not find it.

    What do you guys like for CG on this hull?
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
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  6. #6
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    CG

    Center mass of turn fin.

    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

  7. #7
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    It's been almost 10 years since my last Whip build. Not sure where the CG wants to be.

    Of late on all my sports I've been running CG at the leading edge of the fin and as close to the trailing edge of the sponson as I can get both.
    Noisy person

  8. #8
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    I guess I will have to just test after it is in the water.
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
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  9. #9
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    My cg is at trailing edge of turnfin at the top of turnfin...

  10. #10
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    One cool thing I learned was that if you move the fin forward, it becomes more effective, and vice versa. It's due to the fact that the centrifugal force creates a moment that 'rotates' the boat. Fin too much forward and it hooks. My leading edge of the fin (at the water line) is at the cg.

  11. #11
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    Making a little progress. Lot to do. Thanks for the info guys
    Both sides.jpg
    I really wanted to be able to check the center of the nose for plum. so I added the the bottom board
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
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  12. #12
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    Are you going to skin it in the stock 1/16" ply sheet or go to 1/32" ply?
    Nortavlag Bulc

  13. #13
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    Quote Originally Posted by ray schrauwen View Post
    Are you going to skin it in the stock 1/16" ply sheet or go to 1/32" ply?
    I am being real weight cautious with this build. But strength is important too. I have always used 1/32 for decking on riggers so I do not see why it would not work hear. It is not the deck of a hydro.
    Last edited by RandyatBBY; 01-05-2018 at 04:51 PM.
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
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  14. #14
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    I have a kit sitting her and was thinking what to do with it and I might build it if I ever get other stuff done.

    How about the bottom, still using the 1/16" or 1/32"?

    I figure the bottom is better to be 1/16" but I dunno??
    Nortavlag Bulc

  15. #15
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    Quote Originally Posted by ray schrauwen View Post
    I have a kit sitting her and was thinking what to do with it and I might build it if I ever get other stuff done.

    How about the bottom, still using the 1/16" or 1/32"?

    I figure the bottom is better to be 1/16" but I dunno??
    At present i am going with 1/16 for the bottom
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
    BBY Racing

  16. #16
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    Nice!
    Nortavlag Bulc

  17. #17
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    Good hull for 4s2p. Hull does not have enough depth for fatter 4s1p packs. CG slightly behind turnfin and shallow strut depth for p spec.
    Octura m445 with tips trailing edge bent per proper chopper.

  18. #18
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    Quote Originally Posted by detox View Post
    Good hull for 4s2p. Hull does not have enough depth for fatter 4s1p packs. CG slightly behind turnfin and shallow strut depth for p spec.
    Octura m445 with tips trailing edge bent per proper chopper.
    Thanks
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
    BBY Racing

  19. #19
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    Did I miss what motor you plan to use?
    Nortavlag Bulc

  20. #20
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    Quote Originally Posted by ray schrauwen View Post
    Did I miss what motor you plan to use?
    UL-1 36X56 2030Kv
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
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  21. #21
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    Haha im going to build a new one too! Lol
    Tommy Levescy sponsored by: RCJuice.com, Rawspeed, Scorpion Precision Performance, TC Racing, Triton RC, Oxidean Marine and Cencal Hobbies.
    Current Namba 1mile record holder: Pltd sport hydro 1:19:72 P-sport hydro 1:14:31

  22. #22
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    I got a little time to work on my boat need to have ready for this season.


    I was thinking I would use my cowl may have more room to tape down. I will make a cowl out of FG.
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
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  23. #23
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    Looks great Randy. I have a kit here I could build. Just got a few others ahead of it.

    Repeat question. Whoops..
    Nortavlag Bulc

  24. #24
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    A little progress on the hatches.
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
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    Got the drop down now to build a fiberglass cowl
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
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  26. #26
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    Anyone have info on turn fin profile or shape for P LTD?
    Randy
    For ABS, Fiberglass, Carbon hulls and Stainless hardware
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  27. #27
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    I run zipp kits turnfin

  28. #28
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    Quote Originally Posted by rayzerdesigns View Post
    I run zipp kits turnfin
    So I would guess you run the medium fin?
    Randy
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  29. #29
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    The outrigger turnfin small

  30. #30
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    Randy.
    I've had good success with this fin designed by Raydee, (a member here on Offshore) on small to medium hydros. The size can be scaled up or down Slightly.

    cache.jpg

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