Speed / Hp ?
02-03-2003, 01:16 PM
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Speed / Hp ?
I can't find the sit that had the speed/ horsepwer/ hull drag coeficient(sp) equation. can anybody shoot me the link
Thanks in advance.
Martin
Thanks in advance.
Martin
02-03-2003, 01:29 PM
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02-03-2003, 01:42 PM
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JUST ONCE,
A simple equation that I believe will get you close is:
New Speed = Old Speed times [ the squareroot of (New HP / Old HP) ]
or
New HP = Old HP times [ (New Speed / Old Speed) squared ]
Some people say that it should say "cubed" instead of "squared" but "squared" and "square root" will get you close.
Do the math!
A simple equation that I believe will get you close is:
New Speed = Old Speed times [ the squareroot of (New HP / Old HP) ]
or
New HP = Old HP times [ (New Speed / Old Speed) squared ]
Some people say that it should say "cubed" instead of "squared" but "squared" and "square root" will get you close.
Do the math!
02-03-2003, 05:04 PM
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Could be either something is wrong with the data, or that particular hull needs a different constant. The constants are not fixed in stone, but determined from experience with similar boats.
Picture changing to a Sportmaster or Labbed prop or something else that gives you 5-10 MPH with no change in weight or power, the constant will be different.
The best use of the calculator is to input the known weight, speed and power, then calculate a constant for that hull set up.
Picture changing to a Sportmaster or Labbed prop or something else that gives you 5-10 MPH with no change in weight or power, the constant will be different.
The best use of the calculator is to input the known weight, speed and power, then calculate a constant for that hull set up.
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Marc
www.mercruiserparts.com
www.go-fast.com
www.bammarine.com
www.cyborgtransmissions.com
It's not alive -www.BoatStuffExpress.com - temporarily retired
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