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Are too many dinghies too short?

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rb_stretch View Drop Down
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    Posted: 11 Mar 13 at 2:09pm

I always thought that shorter dinghies are much more weight sensitive than longer ones, because you have less waterline length to absorb the differences in displacement.

 
What surprises me is that given the population as a whole is getting bigger and heavier, why is it dinghies seem to be getting shorter? Back in time there were lots of new design "long" dinghies FD (20 feet), 505s (16+), Ospey (17+), Javelin (17+), IC (17), Fireball (16+) and even single handers like the Contender (16+). Nowadays you almost never see new designs that are "long", which means if you are a heavy helm your choice is very limited. I know that was the issue I was facing when looking to get a doublehander.
 
So why are we restricting the potential audience of sailors by sticking to short boats, when longer boats are better at taking differences in weight? I can only think of price...
 


Edited by rb_stretch - 11 Mar 13 at 2:34pm
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tgruitt View Drop Down
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Post Options Post Options   Quote tgruitt Quote  Post ReplyReply Direct Link To This Post Posted: 11 Mar 13 at 2:28pm
and they're more fun....(apart from 18 footers, they're long and fun!)


Edited by tgruitt - 11 Mar 13 at 2:29pm
Needs to sail more...
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Post Options Post Options   Quote Do Different Quote  Post ReplyReply Direct Link To This Post Posted: 11 Mar 13 at 2:31pm
I think so to, I'm not technically qualified but let's not allow that to get in way of an opinion. I put it down in some measure to the introduction of asymmetric kite and the quest for early planing and off-wind drag race style thrills.   
Horses for courses I guess, literally in fact but I'm old and firmly into long boats that will go upwind in both planing and displacement mode well. I guess the long boats suffer a little in weight and wetted area terms but in my book the compromise has shifted a little to far. 
Maybe on flat water the short boats work better but in a sea punching a tide I'd take another 3ft of hull.
BTW Had a Laser 14ft+, Buzz 14ft (proportionally big kite), now 17ft+ and enjoying it most of all and on every point of sail.
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Post Options Post Options   Quote Jack Sparrow Quote  Post ReplyReply Direct Link To This Post Posted: 11 Mar 13 at 3:44pm
Originally posted by tgruitt


and they're more fun....(apart from 18 footers, they're long and fun!)


and they are lighter ( to trolley, car top ), they fit in your garage ( if you want to make one at home or repair ) take up less space in the dinghy park and use less materials when being built, thus cheaper.
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Post Options Post Options   Quote pondmonkey Quote  Post ReplyReply Direct Link To This Post Posted: 11 Mar 13 at 4:34pm
Originally posted by Jack Sparrow

Originally posted by tgruitt


and they're more fun....(apart from 18 footers, they're long and fun!)


and they are lighter ( to trolley, car top ), they fit in your garage ( if you want to make one at home or repair ) take up less space in the dinghy park and use less materials when being built, thus cheaper.

yep... and if all else fails, you can stick a FO big gantry off the back anyway.
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Post Options Post Options   Quote tgruitt Quote  Post ReplyReply Direct Link To This Post Posted: 11 Mar 13 at 4:41pm
Originally posted by pondmonkey

Originally posted by Jack Sparrow

Originally posted by tgruitt


and they're more fun....(apart from 18 footers, they're long and fun!)


and they are lighter ( to trolley, car top ), they fit in your garage ( if you want to make one at home or repair ) take up less space in the dinghy park and use less materials when being built, thus cheaper.

yep... and if all else fails, you can stick a FO big gantry off the back anyway.


You don't need all that hull anyway, gantries and bowsprits ahoy!
Needs to sail more...
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pondmonkey View Drop Down
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Post Options Post Options   Quote pondmonkey Quote  Post ReplyReply Direct Link To This Post Posted: 11 Mar 13 at 4:50pm
Originally posted by tgruitt

Originally posted by pondmonkey

Originally posted by Jack Sparrow

Originally posted by tgruitt


and they're more fun....(apart from 18 footers, they're long and fun!)


and they are lighter ( to trolley, car top ), they fit in your garage ( if you want to make one at home or repair ) take up less space in the dinghy park and use less materials when being built, thus cheaper.

yep... and if all else fails, you can stick a FO big gantry off the back anyway.


You don't need all that hull anyway, gantries and bowsprits ahoy!

or slow, tactical racing in Solos and Mirrors... either way, 12ft-ish is a winner when it comes to optimum dinghy LWL  Wink
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Post Options Post Options   Quote RS400atC Quote  Post ReplyReply Direct Link To This Post Posted: 11 Mar 13 at 5:13pm
For every long boat from the classic era, there are probably several short ones, all those Herons, Gulls, 11pluses, it's the long ones that have stood the test of time best perhaps?

My personal view is that length is the easiest way to increase performance in light air, if you can keep the weight down.
But the penalty is that a long boat will carry heavy crews with no penalty and they will be faster.
So if you want to have a class with racing over a range of crew weight, you need the boat to be short enough that it punishes the heavy people just enough to offset their power advantage.
At my weight, the RS400 could do with being longer (or a lot lighter) in sub-planing conditions, but it seems to deliver good racing over a range of crew weights, provided the course is not full of fetches and kite-stretching exercises.

I think in anything other than flat water, upwind a fine angle to the bow is key, which basicallly means a long boat for a given volume, and/or the max beam a long way back.
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Post Options Post Options   Quote MerlinMags Quote  Post ReplyReply Direct Link To This Post Posted: 11 Mar 13 at 5:31pm
Originally posted by rb_stretch

given the population as a whole is getting bigger and heavier
The bigger people, these days, are the sort of people who don't do sports! I wonder if sailors on average have got lighter and fitter over the years?
 
My view: 14ft is perfection. Why would you need a boat of any other length? Although with more foiling classes, the length of the hull might become irrelevant.
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Post Options Post Options   Quote SoggyBadger Quote  Post ReplyReply Direct Link To This Post Posted: 11 Mar 13 at 5:36pm
Originally posted by RS400atC

For every long boat from the classic era, there are probably several short ones, all those Herons, Gulls, 11pluses, it's the long ones that have stood the test of time best perhaps?


Or perhaps not. Averaged out since the Millenium there have been about 30 new Herons registered per year. I believe that Hartleys are aiming to build about 20 Gulls per year. Don't know about the Mirror but I can't imagine it being less. The 11 plus was a sweet little boat but never caught on in a big way. And not all the longer designs prospered e.g., Jollyboat.
Best wishes from deep in the woods

SB

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