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Old 04-06-2017, 08:22 AM   #97
RTTOOL
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Join Date: Apr 2008
Location: Meredith,NH.-Nashua,NH
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Quote:
Originally Posted by WJT2 View Post
So at HS/6 MPH you will travel about 528 ft per minute. So by extending the NWZ it will take you about an extra 2 minutes on a round trip visit Meredith next summer. Bonus is you get to relax an extra 2 minutes, save fuel, save wear and tear on your engine and yourself. I'll have to check my schedule to see where I can make some adjustment to find extra time! If boaters showed a little more courtesy and obeyed the 150' rule there would probably be no need for more regulation, BUT.........
If the prop did not slip at all as it screws through the water, each rev theoretically propels the boat the forward a distance equal to the prop pitch. (a 24 inch pitch prop theoretically propels the boat 24 inches in one revolution). The propeller revolution rate is the engine rpm divided by the gear ratio. This propeller rpm times the prop pitch determines the theoretical distance that the boat should have moved in one minute, which can be converted to a theoretical boat speed in miles per hour. with a rpm at 600 and gear ratio of 1.5 and slip at .15 and a prop pitch of 24 will give you 7.7 mies per hour . so to travl 2000 feet would take about 15 minutes.
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