What bottom treatment makes for the most speed? I have polished the bottom of my old fiberglass canoe, using the same equipment and polishes that I use for my car. It's all shiny now. Is there anything else I should do to prepare for a race?
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Posted by: BNystrom on Feb-27-13 7:02 AM (EST)
Now that you've wasted a lot of time polishing it, sand it with 400 grit. The slightly textured surface is actually faster than a polished surface.
Posted by: jackl on Feb-27-13 8:19 AM (EST)
And the other thing is to train, train, and train some more.
Posted by: davavd on Feb-27-13 9:37 AM (EST)
I was afraid the answer would be wet-sand. That's what we used to do to sailboat bottoms back in the day, but I thought just maybe someone had discovered something new. No biggie, the boat is short and I've still got two days before the race. Training I've been doing since I started thinking about the race (Battle-on-the-Bayou, Ocean Springs, MS). I'm in pretty fair condition for a 60 year old; I won't win, but I should finish respectably and have a good time doing it.
Posted by: Pirateoverforty on Feb-27-13 10:42 AM (EST)
Lot's of people just out for the paddle. That first leg you'll be fighting some headwind until you get up into the bayou. Stay out of the pack making that first turn, I have been in a press so tight I couldn't get my paddle in the water. No where to get out and stretch except for the lone bathroom break. I wanted to fix up an old glass canoe and make a run for placing in the solo canoe class but have been spending too much time on the road and haven't finished it.
The winners will be..................|
Posted by: thebob.com on Feb-27-13 11:16 AM (EST)
The winners will be the paddlers who spent the most time training, and have the most experience racing; NOT the paddlers with the canoe that has the most highly polished hull.
What about Rain-X?|
Posted by: magooch on Feb-27-13 11:35 AM (EST)
Some have insisted that Rain-X makes a difference. I'm thinking about trying it, but I wonder how one would ever tell the difference. One thing I've noticed is that when I first launch and take off--no matter which boat I'm in it feels fast. After a few hours of paddling, they all seem to slow down.
Should have the opposite effect. One |
Posted by: ezwater on Feb-27-13 12:52 PM (EST)
wants a tiny, thin layer of water to be able to adhere to the surface.
dimples like a golfball will do that|
Posted by: Pirateoverforty on Feb-27-13 1:03 PM (EST)
Mythbusters did it to a car and improved the gas mileage.
Posted by: willi_h2o on Feb-27-13 11:19 AM (EST)
The "myth" originated earlier than that.|
Posted by: ezwater on Feb-27-13 12:57 PM (EST)
After our rowing coach talked to our MIT naval architects, he had us wet sanding the shells with fine sandpaper.
a fraction of a percent |
Posted by: nickjc on Feb-27-13 1:44 PM (EST)
is all you can hope for with surface treatment. On the other hand, assuming training is all done, improving your drafting/wake riding skills can give you a 10-20% boost.
Posted by: CEWilson on Feb-27-13 2:18 PM (EST)
John Winters, the Shape of the Canoe, has a cogent discussion of surface friction, pgs 21-22.
Reduce bottom size, bottom size|
Posted by: Glenn_MacGrady on Feb-27-13 2:52 PM (EST)
Best way to speed up the canoe's bottom is to reduce its friction and drag by reducing the immersed bottom size.
Posted by: davavd on Feb-28-13 6:48 AM (EST)
Thanks for all the info, everybody, especially the "been there did that", Pirate. I'll try to stay clear on the first turn.