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West Wight Potter Mailing List maintainer
dfarrell@ridgecrest.ca.us
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>
>The P-19 I crew on came with a Nissan 9.9. It is no faster than a 5 HP The
>sails will take the boat faster than the O.B. in a stiff breeze. From just
>over half throttle to full there is no increase in speed as meazsured by
>the knotmeter, just under 6 kn. Suprisingly the theoretical hull speed!HTH
Whoops, you're in trouble now when SF reads this :)
I seem to recall reading in some boat design book about the power needed to
make a boat of given characteristics (weight, beam, etc) plane. I forget the
exact formula, but i seem to recall that when plugging in the numbers for a
p19, it was around 20-30hp.
There were some folks on Lake Chelan in WA state that had a 9.9 on their P19.
they had mounted it centerline and used a dual-rudder arrangement on either
side. Boat name was "SASSEA" if you want to look it up in the archives. They
sold the boat and have since left the list (i presume), but i don't recall that
they claimed it would plane under that power. But i think their reason for the
power was that they regularly carried a pretty heavy load on the boat and the
winds through the valley that the lake sits in can be pretty fierce, so it was
a margin-of-safety thing.
I saw SASSEA once at the dock, but never under sail. I was always curious how
she sailed with all that weight at the stern (9.9, dual hardwood rudders). My
P19 performs much better when I keep the stern as light as possible.
http://www.nwlink.com
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