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#1
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bite me.
"JAXAshby" wrote in message ... Its real easy to test, as I can get my folding 3 blade to stay open. I can see the boat speed, then have it fold and measure the speed. It is significant. If the MIT tests say otherwise then they are not testing reality - wanna guess what errors they made in the test or you in the interpretation??. sure, paul lever knows more testing props than MIT. good on ya, paul. Paul www.jcruiser.org "JAXAshby" wrote in message ... You will definitely will see a decent speed improvement under sail with a folding prop no, you won't. folding props only hve value for racing boats, where 2 seconds a mile means the difference between 2nd place and 6th. According to MIT tests, a folding prop means a savings of a mere 170 pounds drag at 5 knots (or 40 pounds drag at 2-1/2 knots, or 10 pounds drag at 1-1/4 knots) over a --------- three ------------ blade prop. ***Much*** less with compared to a two-blade, and even less compared to a two-blade rotated verticle behind the keel. Wanna guess just how much powered is required to pull 170# at 5 knots? |
#3
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Wanna guess just how much powered is required to pull 170# at 5 knots?
about 2-1/2 hp. that's a LOT, isn't it. |
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