Join Date: Sep 2003
Location: Auckland New Zealand
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Re: Spade Rudders vs. Skeg Hung
Having a spade rudder knocked off by hitting something or tangling with nets etc. is probably a reason for one being nervous of it but I have a different reason for not wanting one.
To test this reason is (for me) simple. Take a broom, hold it in one hand at the very end of the handle and, keeping the handle horizontal, see how long you can hold it. I suspect this test will not take long.
Now hold it in one hand at the very end of the handle and hold it in the middle of the handle with the other hand and, keeping the handle horizontal, see how long you can hold it. You will almost certainly get bored before you get tired.
Now I know there are a lot of engineering formulea that will be postulated by the experts but for me, none of them surpass this simple test. A spade rudder places a vastly greater load on hulls, bearings etc. and simply cannot be as strong (weight for weight, size for size) as a skeg-hung rudder. At least, that's my opinion and I'm sticking to it.
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