Subject: Re: [harryproa] Top Speed
From: "Rob Denney" <harryproa@gmail.com>
Date: 8/12/2007, 9:09 AM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

G'day,
I was on board, but managed to sleep through the 27 knots! 
 
The following was written by a TRT owner on Sailing Anarchy's cruising forum about his TRT 12m GT, which is a performance cruising cat very much in the same vein as XL2
 
Quote
The Seawind 1000 is a good choice. I was out on a friend's 1000 last weekend. Very comfortable for 6 people daysailing and anchoring for lunch. Wind speeds where around 15 knots with flat seas and we were seeing boat speeds in the 6 to high 7's range under working sail. Note: we had 80 gallons of water in the tanks and 30 gallons of fuel along with 6 adults.

In the same conditions the TRT would have been doing 10 - 12 with a single reef in the main and a 120 jib...  end quote
 
Seems a bit tame to me, but still an interesting comparison between these boats and Rare Bird in the video
 
regards,
 
Rob
 


 
On 8/12/07, Paul Nudd <paulnudd@actionpotential.com.au > wrote:

Quoting Rob Denney <harryproa@gmail.com>:

> Top speeds? Who knows, but they are a lot higher than I thought they
> were
> before seeing the video. Rare Bird's mast could be stiffer and the
> sails
> could be improved significantly. Lift a rudder on a broad reach and
> it would hit 20 pretty easily, and Blind Date should not have much
> trouble
> doing 25 based on the weight difference. Add some waves and a crew in
> a
> hurry and who knows what the top speed might be. Hope I am on board
> the day
> we find out!!
-----------------------------------------
In the real world top speed is limited by hull length.
XL2 at 38' appears to have a top speed of 27 knots (Rob was on board
when we did it in 1993).
My estimate is a 40' hull can do 30 knots and a 50' hull can do 35 knots.
What is more significant is how easily the vessel can achieve its top
speed or something near it.
XL2 (catamaran) can very easily exceed 20, often gets to 25 but only
once achieved an instantaneous 27.4.
A 50' lee hull should have a top speed around 35 and the harryproa
configuration should make it fairly easy to get up there close to the max.
Rob will want to be up there but I imagine most harryproa owners will be
happy to frequently hit 25.
PN


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