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Plumper, I will see if I can dig out some specific references for you when I am home and access to my library. I seem to recall a paper from the Chesapeke Sailing Yacht Symposium that might be a good source.
Just to comment on your thought that the leading edge of a skeg hung rudder faces the flow while a posthung rudder is not oriented with the flow, my thoughts are that boats actually move slightly sidewards as the pass through the water because of leeway so the skeg starts out slightly across the flow, and when a boat is actually turning, by its very nature of the stern moving sidewards relative to the course of the boat, the skeg also is moving across the flow of the water.
When you talk about stalling you are talking about high angles of attack, and at high angles of attack to the flow, when you turn a boat with a skeg, the fixed portion of the skeg is actually being driven sidewards across the flow as the stern swings where as a the whole foil on the post-hung blade is able to feather to the flow direction during the turn.
I'll try to look this up and get back with a source.
Respectfully,
Jeff
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