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building my own tunnel flaps

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Old 06-10-2003, 10:53 PM
  #21
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Join Date: Dec 2002
Location: chesapeake bay md
My Boats: 30 motion ob
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I finally was able to run my boat with new tunnel tab. Good results all around. At cruise speed 60-70mph with tab down no porpise at all. Added bonus at top speed with 4 blade props gained about 2mph. Could feel the entire boat lift. With 3blade did not see any speed gain. I only ran about 1hr , with a little more time I may learn some more. One tip When I put tab full down to get on plane The boat was bow steering so much I almost crashed.
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Old 06-10-2003, 11:31 PM
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thnx for info mmwalters.
i think i will try mine in two weeks.
will post results


*Actually i am expecting more top speed gain. like 4-5 mph.Cause my boat is quite heavy,specially back side of it.do you think its possible?
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