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Boat House
Issues getting boat on plane
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<blockquote data-quote="acabtp" data-source="post: 364493" data-attributes="member: 5368"><p>prop changes can be easily calculated, but we need more info first.</p><p></p><p>what motor do you have? we need to know the WOT RPM range and the lower unit gear ratio</p><p>what RPM are you running wide open w/ just two people? if you don't have a tach, get a tinytach and measure, important</p><p>28 mph is your max speed? that's measured with a GPS (like your phone) and not a paddlewheel sensor/pitot tube? (paddlewheels are very inaccurate)</p><p>what RPM are you running wide open w/ all four people when you are going 18?</p><p></p><p>without this info, it's all just a guess, and nobody can give you good advice. if you are already towards the top of your WOT range with your 13P, propping down will let you overrev the motor when lightly loaded (bad).</p></blockquote><p></p>
[QUOTE="acabtp, post: 364493, member: 5368"] prop changes can be easily calculated, but we need more info first. what motor do you have? we need to know the WOT RPM range and the lower unit gear ratio what RPM are you running wide open w/ just two people? if you don't have a tach, get a tinytach and measure, important 28 mph is your max speed? that's measured with a GPS (like your phone) and not a paddlewheel sensor/pitot tube? (paddlewheels are very inaccurate) what RPM are you running wide open w/ all four people when you are going 18? without this info, it's all just a guess, and nobody can give you good advice. if you are already towards the top of your WOT range with your 13P, propping down will let you overrev the motor when lightly loaded (bad). [/QUOTE]
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Issues getting boat on plane
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