speed vs. hp

Richard Dickerson (phrrld@ttuhsc.edu)
Fri, 06 Nov 1998 10:36:36 -0600

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Dear fellow sailors,
I conducted some tests over a known distance to determine whether or not I
could exceed hull speed in my P-15. With a 3.5 hp nissan, max speed of 5.3
mph was achieved at 25% throttle. No increase in speed was measured at 50%,
75% or 100% throttle. If one assumes a linear relationship between throttle
setting and horsepower, this seems to say that approximately 1 hp is
sufficient to achieve hull speed in calm winds and no chop. However, wind,
current, and chop would necessitate having a reserve of at least 2 hp. Has
anyone conducted similar tests?
Richard Dickerson, Ph.D., Diplomate, ABT
Associate Professor
The Institute of Environmental and Human Health
Texas Tech U/TTU Health Sciences Center 5C200
http://www.ttu.edu/tiehh
806 743-2425 ext 243 lab
806 743-2425 ext 232 office
806 743 2744 fax

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speed vs. hp Dear fellow sailors,
I conducted some tests over a known distance to determine whether or not I = could exceed hull speed in my P-15. With a 3.5 hp nissan, max speed of 5.3 = mph was achieved at 25% throttle. No increase in speed was measured at 50%,= 75% or 100% throttle. If one assumes a linear relationship between throttl= e setting and horsepower, this seems to say that approximately 1 hp is suff= icient to achieve hull speed in calm winds and no chop. However, wind, curr= ent, and chop would necessitate having a reserve of at least 2 hp. Has anyo= ne conducted similar tests?
Richard Dickerson, Ph.D., Diplomate, ABT
Associate Professor
The Institute of Environmental and Human Health
Texas Tech U/TTU Health Sciences Center 5C200
http://www.ttu.edu/tiehh
806 743-2425 ext 243 lab
806 743-2425 ext 232 office
806 743 2744 fax

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