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Old 16-01-2010, 19:22   #1
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Boat Speed at Different Points of Sail

I'm creating a simple, little sailing computer game (using Scratch). I have been able to display a little boat under various points of sail (bird's eye view) depending on which way the wind is blowing (i.e. closehauled, beam reach, reach, broad reach, and running for both tacks). I have the ability to designate a different speed for each point of sail. For example, I can set the boat to repeatedly advance one step, two steps, 1.5 steps, .5 steps, etc. So, to make it a little more realistic, I wanted to have the boat vary its speed based on its current point of sail.

So, and I know this depends on a lot of factors, but...generally speaking, how would you rank these points of sail in terms of speed relative to each other? Which is fastest, second fastest, third fastest, etc? If two different points of sail are roughly the same, let me know that too please.

Thanks in advance for your assistance.
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Old 17-01-2010, 02:35   #2
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Try Googling "Polar" for any particular boat you're interested in. Here's one for a J30, for example...

Polar VPP
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Old 17-01-2010, 14:37   #3
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Have you tried this?

National Geographic | Volvo Ocean Race 2001-2002

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Old 20-01-2010, 18:50   #4
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Thanks -- appreciate it!
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