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Fastest dinghy?

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Scooby_simon View Drop Down
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    Posted: 27 Oct 04 at 11:24am

Originally posted by Phil eltringham

The 'sums' I outlined apply equally to cats as to monohulls, Indeed because the righting moment leaver arm is measured between centre of mass and centre of bouyancy, cats have the potential to create huge moments once you start flying one hull.  The trick to maximise this is to have the windward hull just out of the water so as to maximise the leaver arm.  Hence the reason why nearly every holder of speed sailing records has been either a cat or proa. 

 

'nuff said....

Except when it's a windsurfer........

 

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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 04 at 12:36pm
Originally posted by Phil eltringham

.... every holder of speed sailing records has been either a cat or proa. 


I think you'll find the 500m record has never been held by a catamaran, always proas and boards. Catamaran based attempts at 500m speed records seem to have been consistently unsuccessful.

But we're off topic, this was about fastest dinghy in a straight line burst.
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Post Options Post Options   Quote Brian Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 04 at 12:50pm
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Post Options Post Options   Quote hurricane Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 04 at 12:50pm

this is a yachts and yachting article so there ya go id like to see a dinghy beat that record!!!!!

Records were set on Loch Ness on Saturday (August 28) when the crew of a Tornado Sport catamaran turned in the fastest time ever set for a non-stop race from the northern end of the 24-mile long loch to the southern end and back again.

Minnis Bay SC crew Chris Fields and Mike Spelling stormed to victory in their Tornado Sport to finish the Caley Marina Loch Ness Monster Race in under four hours and they set a blistering return leg covering 24 miles in just 1hour 19 minutes and 53 seconds. The top-rated pair from Kent completed both legs in 3 hours 47 minutes 49 seconds.

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Post Options Post Options   Quote hurricane Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 04 at 12:51pm
oh and the waves were huge in that race so slowing them down!!!
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 04 at 12:56pm
16 knots I make that. Very impressive feat of endurance to sail that fast for so long, I'm sure I couldn't.
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Post Options Post Options   Quote Scooby_simon Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 04 at 2:28pm

Originally posted by JimC

16 knots I make that. Very impressive feat of endurance to sail that fast for so long, I'm sure I couldn't.

 

I think 16 kts VMG on a dead run is not too bad.  Take a gybing angle of 90 degrees and it works out at.....  Now where is my calculator and trig tables....

Anyone....

 

I think you'll find the 500m record has never been held by a catamaran, always proas and boards. Catamaran based attempts at 500m speed records seem to have been consistently unsuccessful

 

Sure ?

YEAR BOAT NAME SKIPPER/CREW VENUE SPEED
1975 Crossbow Tim Coleman Portland Harbour, Weymouth, Dorset, England 31.10
1975 Crossbow II

Tim Coleman Portland Harbour, Weymouth, Dorset, England 31.80
1977 Crossbow II Tim Coleman Portland Harbour, Weymouth, Dorset, England 33.80
1977 Crossbow II Tim Coleman Portland Harbour, Weymouth, Dorset, England 34.40
1980 Crossbow II Tim Coleman Portland Harbour, Weymouth, Dorset, England 36.00
1986 Board Pascal Maka Sotavento, Fuerteventura, Canary Islands, Spain 38.86
1988 Board Erik Beale St Maries de la Mer, France 40.48
1990 Board Pascal Maka St Maries de la Mer, France 42.91
1991 Board Thierry Bielak St Maries de la Mer, France 43.06
1991 Board Thierry Bielak St Maries de la Mer, France 44.66
1993 Yellow Pages Endeavour Simon McKeon Sandy Point, Victoria, Australia 46.52

I make that just a few for cross bow/II

From http://www.speedsailing.com/Background_records.htm

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Phil eltringham View Drop Down
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Post Options Post Options   Quote Phil eltringham Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 04 at 3:46pm

Jim, please don't miss quote me, I did say "nearly every"

Brian, the problem with foiling is that at about 40 knots foils begin to cavitate, its very complex but suffice to say that its an upper limit which there is little point in trying to push as there are better ways of heading towards the magic 50 knot figure. 

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Post Options Post Options   Quote rogerd Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 04 at 4:19pm
I am sure crossbow was a proa.
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Post Options Post Options   Quote redback Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 04 at 6:15pm

90 degree gybing angle, just multiply by 1.4 and you've got speed through the water - 22.5 for 16 VMG



Edited by redback
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