Quote:
Originally Posted by DDW
Yes, dragging it though the water would be like flat plate drag, Cd around 1.1. If it generates lift instead, it can be a little bit higher, but you are unlikely to exceed a Cl of around 1.3 with the crude shape of a fish. A properly shaped asymmetric airfoil can get up to maybe 1.6, a lot higher with a bunch of high lift devices - but fish are usually just a flat plate of steel or aluminum.
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Thanks. That actually made sense to me :-).
Edit to add: actually I'm still slightly confused, but it helps. Off to educate myself...