OMG people...this is so simple, I can't believe it's still going on. Two
boats, identical in every way *except* one has 50 more horses than the
other, turning a prop at 6000 rpm. At 6000 rpm, they will be traveling at
the exact same speed. Forget about the fact that the stronger engine may get
to speed faster...*AT* 6000 rpm they will be moving at the same speed! We're
talking *SPEED* here not *distance* in a given time. Of course if someone in
the 250hp boat raises a skier's spotter flag while underway, that changes
everything g.

--Mike

"M" wrote in message
oups.com...

Injam wrote:
Yeah. I said in another post that the 250hp boat would have a prop that
would over rev it. The driver would have to ease off the throttle in
order
to keep it at 6000 RPM.



"M" wrote in message
oups.com...

Injam wrote:
Sorry about that M. I was not trying to be insulting just funny.
But what I say is true. The 200hp boat would be faster.
In my scenario the 200hp boat is lighter.

yes. same prop the 250 would not go WOT ..

Your example may be simpler if you said same everything , 200 HP but
one boat heavier as the other...

More power would have to be used to push the heavier boat out of the
water thus less power would be available to push it forward...

Matt