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MainlySwimming View Drop Down
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Posts: 65 		Post Options Post Options   Quote MainlySwimming Quote  Post ReplyReply Direct Link To This Post Topic: Not exactly a dinghy but...
    Posted: 15 Nov 06 at 6:36pm

...not exactly a keelboat either, so apologies for posting here but thought anyone who hadn't seen it may be interested..

It's on the front page of sailinganarchy today and an interesting browse:

http://www.monofoil.com/boat/index.php

 
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Quagers View Drop Down
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Posts: 279 		Post Options Post Options   Quote Quagers Quote  Post ReplyReply Direct Link To This Post Posted: 16 Nov 06 at 5:55pm
looks like their gonna try to break every sailing speed record in the book.
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mike ellis View Drop Down
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Posts: 2339 		Post Options Post Options   Quote mike ellis Quote  Post ReplyReply Direct Link To This Post Posted: 16 Nov 06 at 7:24pm

Originally posted by turnturtle

where do you sign up to become a test pilot?

what he said

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Charlie View Drop Down
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Posts: 209 		Post Options Post Options   Quote Charlie Quote  Post ReplyReply Direct Link To This Post Posted: 16 Nov 06 at 8:32pm
Originally posted by turnturtle

where do you sign up to become a test pilot?


Same place as for crash test dummies
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rogerd View Drop Down
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Posts: 1076 		Post Options Post Options   Quote rogerd Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 06 at 8:43am

I may have misunderstood the theory but I thought foils start to cavitate and so restrict speeds to around thirty knots.

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Rupert View Drop Down
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Posts: 8956 		Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 06 at 8:53am
It seems to me they are going for the "one toe in the water and calling it swimming" approach to speed here. I'm sure a jet fighter could break the land speed record by flying low over a mile of salt flat trailing a wheel on a long rod along the ground, but that wouldn't be driving. Is this really sailing, or is it a water take off glider? Personally, and based on no scientific knowledge at all, I think they are going to have a nasty shock when they actually try and use the thing, and discover just how difficult it is to get to the 20 knots they need for the whole thing to actually achieve lift off, and how unstable it will all get if they ever manage that. 
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NickA View Drop Down
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Posts: 784 		Post Options Post Options   Quote NickA Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 06 at 5:16pm

I reckon it's genuine sailing because it needs the water to be there in order to work (unlike the fighter jet analogy).

It's not so different from a windsurfer really.

As the configuration doesn't cause the "boat" to heel they can use as big a sail as they want so there needn't be any lack of drive force to achieve that 20knt lift off speed.  Trouble is, wind isn't steady so surely the hull will bounce up and down (as the model's does in the video) and the thing will have to be incredibly strong to withstand the battering.

Anyway, good luck to them.  Crazy contraptions are great.  Wonderful when the work and even more fun when the self destruct at speed.
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Stefan Lloyd View Drop Down
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Posts: 1599 		Post Options Post Options   Quote Stefan Lloyd Quote  Post ReplyReply Direct Link To This Post Posted: 20 Nov 06 at 8:52am

"I may have misunderstood the theory but I thought foils start to cavitate and so restrict speeds to around thirty knots"

So how do you think sailboards manage almost 50 knots?
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Stefan Lloyd View Drop Down
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Posts: 1599 		Post Options Post Options   Quote Stefan Lloyd Quote  Post ReplyReply Direct Link To This Post Posted: 20 Nov 06 at 9:07am

Originally posted by Rupert

is it a water take off glider? 

Gliders get the energy to move forwards by sinking through the air (although the pilots also look for air that is rising, so the glider may rise relative to the ground even though it is sinking through the air). This design can't get energy in that way, or it would sink. Therefore it is not a glider.
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