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Phat Bouy View Drop Down
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    Posted: 04 Oct 05 at 5:25am
I've been tossing this around for a while; what about a 16-17' fairly high performance dinghy designed so that the mainsail is a double skinned affair, basically an air pocket. The majority of the pocket would be in a"wing" between 6 and 10' long and would slide side to side either by electric power or by the crew using the mainsheet and either tacking or gybing across the wind. The cunning stunt here is to fill this pocket with super-saturated hydrogen gas. This would have the effect of dropping the CG of the boat to below the water line. This would eliminate the need for "trapeze" wires and according to my detailed calculations, the toe-straps could go as well and the crew would not need strapping down or up. The effect would be that the boat will always be upright and therefore at the optimum sailing position.

There would be a deep daggerboard (non-retractble) with lots of weight in it- and the ends of the wing would contain gas cannisters for replenshing the "pocket" in the "wing" therby helping to "prevent" a semi-permanent capsize. The hull would be fairly narrow and the wing would pivot for trailering or stowage.It would have a spinnaker... oh and some of the gorgeous sparkly stickers and probably a rudder as well.

These are pictures of an rc model with such a system on it:

http://www.cupid_stunt.com/pikchures/c_s_01.jpg

http://www.cupid_stunt.com/pikshures/c_s_02.jpg

The concept is to allow high performance without the physical requirements of actually sailing in order to open up the thrill of performance dinghy sailing to people that for whatever reason don't want to or physically can't hike or use a trapeze.

I'd really like to hear comments... (no, not really!!)
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a_stevo View Drop Down
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Post Options Post Options   Quote a_stevo Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 05 at 5:32am

http://www.moth.asn.au/news/wa_2001_nov.html  -double skin sail

By the way, you are joking arent you? i really hope so.

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Contender443 View Drop Down
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Post Options Post Options   Quote Contender443 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 05 at 7:21am
It's not April the first today is it??????????
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Marine Boy View Drop Down
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Post Options Post Options   Quote Marine Boy Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 05 at 8:28am
I just hate that feeling when one minute you start reading a post then the next you're lying on the floor in a pool of wee...oh please stop it !
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Post Options Post Options   Quote CurlyBen Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 05 at 8:37am
Anyone else think there's some similarities here?
Originally posted by Doug Lord

I've been tossing this around for a while: what about a 16-17' fairly high performance dinghy designed so that the skipper sits down in it like a mini 12 but with a difference: the majority of ballast would be in a"wing" between 6 and 10' long and would slide side to side either by electric power or by the crew using a "bicycle winch":leg power moves the weight(weight about 170-200 pounds). The whole wing would move side to side along with a weight sliding on it so the CG of the movable weight could get up to 8' or so from the CL of the boat.The wing would be supported by "Trapeze" wires. The wing and the crew seat would be somehow tied together so that the crew could slide aft as necessary and/or the boat would be equipped with a rudder t-foil.
There would be a deep daggerboard(retractble) with some weight on it- and the ends of the wing would contain buoyancy pods to help prevent a permanent capsize.The hull would be fairly narrow and the wing would pivot for trailering or stowage.It would have a spinnaker...
These are pictures of an rc model with such a system on it:
http://www.microsail.com/pictures/m24c5.jpg

http://www.microsail.com/pictures/m24c6.jpg

The concept is to allow high performance without the physical requirements of most dinghies in order to open up the thrill of performance dinghy sailing to people that for whatever reason don't want to or physically can't hike or use a trapeze.
I'd really like to hear comments...
=================
Edited to try to determine why the url's here are "live" and the one on my last post is not...


Originally posted by Phat Bouy

I've been tossing this around for a while; what about a 16-17' fairly high performance dinghy designed so that the mainsail is a double skinned affair, basically an air pocket. The majority of the pocket would be in a"wing" between 6 and 10' long and would slide side to side either by electric power or by the crew using the mainsheet and either tacking or gybing across the wind. The cunning stunt here is to fill this pocket with super-saturated hydrogen gas. This would have the effect of dropping the CG of the boat to below the water line. This would eliminate the need for "trapeze" wires and according to my detailed calculations, the toe-straps could go as well and the crew would not need strapping down or up. The effect would be that the boat will always be upright and therefore at the optimum sailing position.

There would be a deep daggerboard (non-retractble) with lots of weight in it- and the ends of the wing would contain gas cannisters for replenshing the "pocket" in the "wing" therby helping to "prevent" a semi-permanent capsize. The hull would be fairly narrow and the wing would pivot for trailering or stowage.It would have a spinnaker... oh and some of the gorgeous sparkly stickers and probably a rudder as well.

These are pictures of an rc model with such a system on it:

http://www.cupid_stunt.com/pikchures/c_s_01.jpg

http://www.cupid_stunt.com/pikshures/c_s_02.jpg

The concept is to allow high performance without the physical requirements of actually sailing in order to open up the thrill of performance dinghy sailing to people that for whatever reason don't want to or physically can't hike or use a trapeze.

I'd really like to hear comments... (no, not really!!)

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49erGBR735HSC View Drop Down
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Post Options Post Options   Quote 49erGBR735HSC Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 05 at 6:08pm
Can't spot any similarities at all  
Dennis Watson 49er GBR735
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Isis View Drop Down
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Post Options Post Options   Quote Isis Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 05 at 6:43pm
It would have a spinnaker... oh and some of the gorgeous sparkly stickers and probably a rudder as well.


BWUHAHAHAHAHAHA!!!!
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Black no sugar View Drop Down
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Post Options Post Options   Quote Black no sugar Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 05 at 7:23pm

You might laugh, you boys, but I don't think it's a silly idea...... The boat design would have to be carefully planned, though. I think a smaller hull of more even dimensions could work. Similarly, the sail wouldn't look quite like the traditional dinghy sail, but adopt a looser silhouette depending on weather conditions. 

One detail I don't see working: the gas canisters... Pffft, that's a bit unpredictable, innit? What about a calorific device set at the bottom of the sail? The pressure would be such that no mast would be any longer needed...  

The crew would indeed adopt a more relaxed view of sailing and, in good days, move into another dimension!

Ohhh I can hear you laughing, but it's been done before! Check this converted dinghy running gracefully on a French river :

http://www.funandsky.com/prestation/photos/1200dpbateaux001. jpg

 

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Black no sugar View Drop Down
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Post Options Post Options   Quote Black no sugar Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 05 at 7:24pm
Oh and PS: When it comes to sparkly stickers and pretty colours, the sky's the limit!!
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Phat Bouy View Drop Down
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Post Options Post Options   Quote Phat Bouy Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 05 at 8:45pm
One detail I don't see working: the gas canisters... Pffft

Ah, well, yes, no, yes now you see I've spoken to the British Oxygen Corporation (BOC) and at great length. They assure me that their gas would go with a might woooooosh not at all like a damp squib of a pffft. Definitely a might woooosh - hang on, it might have been a wooooom. Oh Lord, I'm not entirely sure - I'll get back to you in this, well just as soon as I can get some more change for the telephone box and they only let me out on Tuesdays. Are but then I wouldn't have enough for the light meter - I'll get back to you next week!
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