[PCW] Fw: outdrives

[Tradesure]

Pat,
       I read many of your comments whihc is very valuable and informative
to us in the boat building business.
I agree that the design and durability of outdrives have improved 100%.

In one of your mails you mentioned that a catamaran the same size as a 
monohull
would not really be of value excepting stability.

The last monohull I built was 53ft, then I changed to building Power 
Catamarans.

Last year I completed a 50ft power catamaran with a beam of 15.86ft and
amazed myself in the process.

I fitted 4 full size double bed cabins with lots of storage, (for normal 
fitted bedding
bought in stores), 4 bathrooms with seperate showers, a galley with saloon 
table for 8,
seperated from a drive station, seating and bar, a great aft cockpit with an 
engineroom
below with 6ft 2inches of headroom.
The fuel tanks were also bigger, the water not, so on went a watermaker.
I definately could not do this on the 53 monohull with a similar beam.

Tim  Aventure-Powercatamaran



----- Original Message ----- 
From: "Pat Reischmann" <preischmann at msn.com>
To: "power-catamaran" <power-catamaran at lists.samurai.com>
Sent: Tuesday, April 22, 2008 2:56 PM
Subject: [PCW] outdrives


> As with most things outdrive design has improved over the years. Most of 
> the
> disadvantages listed relate to old technology.
> Volvo has been the leader in this area. Their outdrive legs are made of
> composite, so no more corrosion problems. The have also been designed to 
> raise
> higher for better clearance. The synthetic gasket material today is very
> reliable. I have built over 100 yachts with saildrives with similar 
> sealing
> gaskets and never had a problem, this is with yachts in service for over 
> 10
> years. Additionally Volvo offers Duoprop technology which can improve fuel
> economy by another 20%. I do believe the drive train is the most 
> susceptible
> part of an inboard install. Stuffing box, cutlass bearing, coupler, 
> keyway,
> alignment etc. That is why I am currently a big advocate of enclosed shaft
> systems with inboard installations. Though it costs more, I for one would 
> not
> do another inboard install any other way.
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