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Post by Ray Wirth on Jun 9, 2015 17:06:04 GMT -5
Just 'cause flatwater season is coming up, or just 'cause whitewater season is over, or just 'case THE WHITEWATER NATIONALS ARE IN MAINE THIS YEAR, I've been playing around with creating a kayak hull speed calculator that allows for comparison between different hulls. Yeah, it probably works for canoes too. If you don't know the actual waterline length and waterline beam of your boat, you can probably estimate it pretty accurately. The calculator is based on a formula presented by Robert Wederich in an article " How Fast is Your Kayak? " in Coast & Kayak Magazine. The calculator is here: Kayak Hull Speed CalculatorPlease add your boat to the list. Any feedback for improving the calculator will be much appreciated! |
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Post by ben on Jun 11, 2015 12:02:31 GMT -5
OK Ray, at the risk of "showing my hand" I will post my boat stats soon (even made a jig last night for the width measurement). It would be nice if the list of boat speeds was in mph rather than nautical miles. I didn't see your Firebolt on there...
-Just for laughs I tried out the formula and spreadsheet with the stats for a WSBS X-Par Missile and got a max sprint speed of 8.67 mph.
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Post by Peter on Aug 23, 2022 14:51:21 GMT -5
This is an old thread but pretty neat! I am surprised to not have heard of this calculation before. Have you experienced any truth to the numbers spit out by this calculator? I'm considering a few different options for canoes to race in flatware categories.
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Post by Peter on Aug 23, 2022 15:06:54 GMT -5
Just anecdotally the sprint vs long distance speeds seem off... at least for canoes. I race marathon canoes in the pro class, and the boats are 18.5'x27" and the max sprint speed should be 5.78 mph according to the calculator, but we can easily maintain 6.52 mph for hours and hours.
In the stock class (18.5'x32") we can maintain the expected sprint speed of 5.16 mph basically indefinitely and usually race around 5.9 mph. Curious to hear others' real world comparisons?
What I would say is that the MARGIN between hull designs seems about right. In the real world I see stock class boats traveling about 0.62 mph slower than pro class boats given the same paddlers.
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Post by Peter on Aug 23, 2022 15:11:08 GMT -5
Wish I could delete my last comment... math errors abound! In real life my experiences are pretty close to this calculator, except sprint speed = racing speed for a long distance.
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Post by Ray Wirth on Oct 9, 2022 11:38:12 GMT -5
Just anecdotally the sprint vs long distance speeds seem off... at least for canoes. I race marathon canoes in the pro class, and the boats are 18.5'x27" and the max sprint speed should be 5.78 mph according to the calculator, but we can easily maintain 6.52 mph for hours and hours. In the stock class (18.5'x32") we can maintain the expected sprint speed of 5.16 mph basically indefinitely and usually race around 5.9 mph. Curious to hear others' real world comparisons? What I would say is that the MARGIN between hull designs seems about right. In the real world I see stock class boats traveling about 0.62 mph slower than pro class boats given the same paddlers. Thanks for the feedback. I am also wondering if you are racing solo or with a partner in your marathon racing canoes. Obviously, the hull speed numbers would be need to be adjusted in the case of two paddlers rather than one. |
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Post by Ray Wirth on Oct 9, 2022 11:46:31 GMT -5
I also cleaned up the calculator. Sorry for the delayed response!
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