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Old 27 August 2018, 12:24   #41
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Originally Posted by HUMBER P4VWL View Post
I think you’ll find it was “recommended” petrol HP


Hmm! I stated actual HP, maximum hp is slightly more. So would bring the ratio closer to unity.
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Old 27 August 2018, 12:28   #42
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As with many “laws” I suspect many misunderstood it though. Certainly some of the data points are for the actual HP they have fitted not the maximum outboard HP the hull is rated for as originally proposed!
Correct Mr Polly,
The results as always are dependent on the quality of data used just so how good a rule of thumb Mr. Wilk's theory was. My correlation was on the data given across the sample which was actual engine size which I did not independently validate!

I 'm sure different sizes of tanks are also available on the same size boat, so which figure then to use?

Who knows, there is probably a degree thesis or PhD somewhere in this.
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Old 27 August 2018, 13:16   #43
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Originally Posted by HUMBER P4VWL View Post
I think you’ll find it was “recommended” petrol HP
you are quite right - I fell into the RIBnet trap of thinking they were the same thing!
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Old 27 August 2018, 13:40   #44
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you are quite right - I fell into the RIBnet trap of thinking they were the same thing!


You mean "maximum & recommended" aren't one & the same? News to me[emoji6]
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Old 27 August 2018, 14:06   #45
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You mean "maximum & recommended" aren't one & the same? News to me[emoji6]
21 units a week for a man I believe. I may be stressing the transom a bit...

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Old 27 August 2018, 15:16   #46
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Interesting. Our new 11m has 1200hp and 1200 litres so it still holds to your equation.
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