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PWC Hull modification question
Hi Guys,
New to the group, but it seems like this is a place with enough expertise to answer the question I have. I'm attempting to make an aqua-trailer for camping and exploring behind my personal watercraft. Something similar to this http://www.hydrotrailer.com/index.html . I don't want to spend 800 dollars on one of those or have to track one down, so I want to make my own using an old fiberglass jetski hull. The hull I'm starting with is an older standup jetski hull about 6 feet long, similar to this http://www.bearlakefun.com/sxi1.jpg . I've got a couple questions for those of you knowledgeable about fiberglass and hull design. 1. What should I do with regard to the rear end of the ski? It's pretty much 90 degree vertical at the rear end, which works fine when it has a motor powering it, but will this create drag or instability when towing it at planing speeds? Would rounding it off in the rear so that it's more bulbous be a more stable or efficient design? 2. What should I do to the current coating/paint on the jetski hull to properly fiberglass it? Sand it down/off until I hit smooth glass I would assume, but if aesthetics aren't really that important, would the bond be strong if I epoxy the glass on top of a roughed up topcoat? 3. Any suggestions you guys have to make this thing more stable and efficient when being towed behind at 30-40 mph? I would think flatter is better in a planing hull behind a craft that is breaking and smoothing the water in front of it, but I also don't know much about hull design. Since gas mileage is a factor of how far I can explore, the less drag that this thing (~300 pounds loaded I'm guessing) puts on my watercraft, the better. Let me know if you have any ideas. Thanks so much guys, I welcome any and all responses Chris D. Austin, Tx |
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