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Old 26-06-2012, 02:18 PM   #1
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Country: On Water
Location: Out West
Boat make: Cougar 27
Engines: Mercury Promax 300X

Join Date: May 2011
Location: Out West
Posts: 69
Arrow Cougar 27 hull effeciency?

Hi all,
Can anyone give me a rough guide to how much more efficient a stepped hull is over a normal V-hull?
Are we talkin 10 or 20%??
Thanks,
Barry
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Old 27-06-2012, 01:51 AM   #2
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Join Date: May 2009
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According to the attached article steps give 10-15% more speed, however I am no expert. I suspect the Cougar 27 hulls are relativly efficent as not many 27ft boats do 70mph with the lump of a Honda 225hp four stoke on the back. Daze on here recently fitted a Merc 200hp engine and reconed good for 75mph because of lighter engine and sorter shaft.
Attached Files
File Type: pdf Stepped plane hulls.pdf (313.3 KB, 181 views)
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