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Do Different View Drop Down
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Posts: 1312 		Direct Link To This Post Topic: 420 winged rudder
    Posted: 24 Jan 13 at 1:24pm
Mr Holman: A prime example of the more you know the less you need to say.
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pondmonkey View Drop Down
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Posts: 2202 		Direct Link To This Post Posted: 24 Jan 13 at 12:58pm
Originally posted by Daniel Holman

Over 10000 views, 140 replies,14 pages, hinted litigation, all because someone mistook a N12 for a 420!
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luv it!
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tick View Drop Down
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Posts: 223 		Direct Link To This Post Posted: 24 Jan 13 at 12:51pm
....easily done, I thought a conker was a UFO.......
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Posts: 997 		Direct Link To This Post Posted: 24 Jan 13 at 12:19pm
Over 10000 views, 140 replies,14 pages, hinted litigation, all because someone mistook a N12 for a 420!
Only t'interweb

Edited by Daniel Holman - 24 Jan 13 at 12:50pm
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Posts: 1005 		Direct Link To This Post Posted: 24 Jan 13 at 12:19pm
Originally posted by tick

I believe that DCB has quite a lot of rocker which sweeps the stern wave up and off the transom. Does that mean that a boat of lesser performance but similar characteristics would also benefit? How about a "T" foil Wayfarer?

Like this one?
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Posts: 8956 		Direct Link To This Post Posted: 24 Jan 13 at 12:08pm
I think I'll enter the BM in a T foil Firefly next year. No one will mind...
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tick View Drop Down
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Posts: 223 		Direct Link To This Post Posted: 24 Jan 13 at 12:06pm
I believe that DCB has quite a lot of rocker which sweeps the stern wave up and off the transom. Does that mean that a boat of lesser performance but similar characteristics would also benefit? How about a "T" foil Wayfarer?
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Posts: 116 		Direct Link To This Post Posted: 24 Jan 13 at 11:56am
the ones on the twelves have quite a large lifting effect.
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Posts: 350 		Direct Link To This Post Posted: 24 Jan 13 at 9:00am
thank god some sanity is returning instead of the outrage and pseudo-official bluster we have had in this thread so far

do such wings have a lifting effect or do they just stop air travelling down the rudder?
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Posts: 397 		Direct Link To This Post Posted: 23 Jan 13 at 9:51pm
I think it has been established this was probably a case of mistaken boat identity. What colour were the boats. 
To elude to the original question about would they improve performance of a 420. On the N12 it has made a huge difference to performance on boats designed around a winged rudder. The sail juice handicap has been dropped by about 30 points since they were introduced. Some difference has been observed on retro fit boats too.
They seem to make a difference as soon as the boat is moving. They do not work in the same way as the Moth or I14 foils. We carry them higher, and in the stern wave which has been modified on boats like the DCB to project more upwards at the foils. You can see the difference in stern wave by adjusting the angle of attack. As a result the rig has been moved aft, and we sit further back. 
I wonder if what was seen were the N12's they now have a similar start time to the 420's.

Andy


Edited by andymck - 23 Jan 13 at 9:53pm
Andy Mck
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