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Habbi

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Since: Jun 22, 2003
Posts: 57



(Msg. 1) Posted: Fri Jul 18, 2003 11:23 pm
Post subject: hp required
Archived from groups: rec>boats>building (more info?)
How many hp would it take to push an aluminum hull 31' long by 12' wide with
a 9 degree deadrise weighing 15000 lbs approx 35 mph with a sterndrive. I
know there are many variables but I just want a ballpark idea. Would 300 hp
do it or would you need 1000hp.

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Brian Whatcott

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Since: Jun 22, 2003
Posts: 434



(Msg. 2) Posted: Sat Jul 19, 2003 3:26 am
Post subject: Re: hp required [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
On Fri, 18 Jul 2003 20:23:49 GMT, "Habbi" <habbi RemoveThis @islandtelecom.com>
wrote:

 >How many hp would it take to push an aluminum hull 31' long by 12' wide with
 >a 9 degree deadrise weighing 15000 lbs approx 35 mph with a sterndrive. I
 >know there are many variables but I just want a ballpark idea. Would 300 hp
 >do it or would you need 1000hp.
 >
I reckon it would take 1155 HP plus or minus 1.2 HP.

Brian
(tongue in the usual place)<!-- ~MESSAGE_AFTER~ -->

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Brian Combs

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Since: Jul 16, 2003
Posts: 34



(Msg. 3) Posted: Sat Jul 19, 2003 3:26 am
Post subject: Re: hp required [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
and this would be easily accomplished with a couple of fairbanks morse 15
cyl models going though a step 1:8 gear turning a couple of 36X36 wheels
Wink

another Brian
tongue also in the usual place
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Rick Tyler

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Since: Jun 23, 2003
Posts: 35



(Msg. 4) Posted: Sat Jul 19, 2003 8:36 am
Post subject: Re: hp required [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
On Fri, 18 Jul 2003 20:23:49 GMT, "Habbi" <habbi.RemoveThis@islandtelecom.com>
wrote:

 >How many hp would it take to push an aluminum hull 31' long by 12' wide with
 >a 9 degree deadrise weighing 15000 lbs approx 35 mph with a sterndrive. I
 >know there are many variables but I just want a ballpark idea. Would 300 hp
 >do it or would you need 1000hp.
 >
You could probably get to hull speed (I know, I know) with 30hp.
Planing would probably take more like 375hp than 300. 35 MPH could
very well take even more than that. Just a WAG, though. Have you
thought about a nice 15-foot sailing dinghy?

- Rick Tyler<!-- ~MESSAGE_AFTER~ -->
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Jacques Mertens

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Since: Jun 25, 2003
Posts: 34



(Msg. 5) Posted: Mon Jul 21, 2003 2:06 pm
Post subject: Re: hp required [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
The well proven Crouch formula shows 550 HP.

--
Jacques
<a style='text-decoration: underline;' href="http://www.bateau.com" target="_blank">http://www.bateau.com</a>

"Habbi" <habbi DeleteThis @islandtelecom.com> wrote in message
news:pHYRa.9308$jL2.1070797@ursa-nb00s0.nbnet.nb.ca...
 > How many hp would it take to push an aluminum hull 31' long by 12' wide
with
 > a 9 degree deadrise weighing 15000 lbs approx 35 mph with a sterndrive. I
 > know there are many variables but I just want a ballpark idea. Would 300
hp
 > do it or would you need 1000hp.
 >
 ><!-- ~MESSAGE_AFTER~ -->
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