Stuart Wright wrote:
...excerpted...
I now have an as yet to be finished Trawler
style cat that I ordered as a 48 foot but through the build process it
got stretched to a 53.5 with swim step. After launch and 19 inches
down in the bow, the builder kept heming and hawing about how to
fix the problem. I finally got disgusted, called my marine surveyor
and we got a marine engineer who had cat experience and is a
hydrodynamist. With a new larger better shaped bulb and a total
re-make of the after section, the boat sits level, the transom is the
end of the hull. The boat as proven in the last sea trial done in 25
Knot breezes with 30 Knot gusts and short duration chop of 4 to 6
feet is very stable and the new hull slides through the water. All the
wake is created from the after section. The down side now is the low
horsepower engines versus too much weight giving a top speed of 11.5
Knots full speed in flat or choppy water.

Brian responded:
This sounds like the same situation that arises in many custom build
projects.....the owner continues to add things on after the design is in
build, and the boat gets bigger and heavier. And the weights get added in,
and
many times in locations that don't suit the trim of the vessel.

Malcom Tennant has addressed this subject on a number of occassions. Have a
look at this article he wrote, and pay attention!
http://www.tennantdesign.co.nz/BoatArticles/68/powercatslcg.html

Brian Eiland

beiland@usa.net
www.RunningTideYachts.com
distinctive expedition yachts

Brian:
I have read Malcom Tennant's articles and I agree with him.
I, however was not the one making all the changes during
initial build. Some of the changes were done by the person
I ordered the boat from and some were done by the builder.
98% of the changes were done with out my knowledge or
consent.
The modifications on the other hand were worked out with my
engineer and surveyor and myself. The mods have made a
viable boat out of water born ant eater.

Stuart S. Wright
----- Original Message -----
From: brian eilandmailto:beiland@usa.net
To: Power Catamaran Listmailto:power-catamaran@lists.samurai.com
Sent: Wednesday, June 21, 2006 5:44 AM
Subject: Re: [PCW] Stuart Wright introduction/New power cat by trial and
error

Stuart Wright wrote:
...excerpted...
I now have an as yet to be finished Trawler
style cat that I ordered as a 48 foot but through the build process it
got stretched to a 53.5 with swim step. After launch and 19 inches
down in the bow, the builder kept heming and hawing about how to
fix the problem. I finally got disgusted, called my marine surveyor
and we got a marine engineer who had cat experience and is a
hydrodynamist. With a new larger better shaped bulb and a total
re-make of the after section, the boat sits level, the transom is the
end of the hull. The boat as proven in the last sea trial done in 25
Knot breezes with 30 Knot gusts and short duration chop of 4 to 6
feet is very stable and the new hull slides through the water. All the
wake is created from the after section. The down side now is the low
horsepower engines versus too much weight giving a top speed of 11.5
Knots full speed in flat or choppy water.

Brian responded:
This sounds like the same situation that arises in many custom build
projects.....the owner continues to add things on after the design is in
build, and the boat gets bigger and heavier. And the weights get added in,
and
many times in locations that don't suit the trim of the vessel.

Malcom Tennant has addressed this subject on a number of occassions. Have a
look at this article he wrote, and pay attention!
<http://www.tennantdesign.co.nz/BoatArticles/68/powercatslcg.html<http://ww
w.tennantdesign.co.nz/BoatArticles/68/powercatslcg.html>>

Brian Eiland

beiland@usa.netmailto:beiland@usa.net
www.RunningTideYachts.comhttp://www.runningtideyachts.com/
distinctive expedition yachts

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