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Kayak and Canoe Design Bulletin Board
Re: Suction and such...
Posted By: Nick Schade In Response To: Re: Suction and such... (Ian Johnston)
Date: Tuesday, 5 October 1999, at 9:48 a.m.
> Okay, now that we have decided that those bulbous protrusion thingies on
> ships won't benefit a kayak, what is the point of the bifurcated bow on a
> baidarka?> I have read some sources that say they are a benefit to the performance of
> the boat, are they? If the bow is pitching too much wouldn't this also
> negate their effectiveness, or is this a totally different principle?Many of the bifurcated bows curved up at the end so they were not even shaped to act like the bulbous bow of a modern ship. The most obvious reason for them is the inability to make a concave shape in skin/fabric without somehow pulling the skin in. You could just puncture the skin and tie it to some interior object, but that is hard to seal. It is easier to cut large hole in the skin and sew the two sides together.
By creating the hollow, they created a boat with a fine entry with reserve buoyancy above the waterline. This helps raise the bow over waves. The same problem can be addressed with an overhanging bow like Greenland style kayaks.
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