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Medway Maniac 
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Joined: 13 May 05 Location: United Kingdom Online Status: Offline Posts: 2788 |
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 Topic: Spy photosPosted: 08 Apr 09 at 11:28am |
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Now you mention it, yes. Didn't look that big at a glance, and something about the post made me think singlehander (Ian! Edited by Medway Maniac |
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Mark Jardine
Admin Group
Joined: 12 Mar 04 Location: Milford-on-Sea, United King Online Status: Offline Posts: 1028 |
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Posted: 08 Apr 09 at 11:36am |
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As seen on the Dinghies in 2020 thread
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JimC
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Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6662 |
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Posted: 08 Apr 09 at 12:25pm |
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Apparently the stern rudder is just for launching and low speed handling: they hope to eliminate it completely.
According to JulianB on SA Frank B did 75% of the work including building and wet sanding the foil arrays... I'd like to hope I'd be capable of doing that sort of work at nearly 89...
An awful lot more robust for on/off the water handling too I would have thought. I've been mulling over having short stubs sticking out from the chines to support and protect the foil ends with a retractable centre foil to make launching easier, but that's a far more elegant solution for a one design boat. Even if it takes a small performance penalty in a one design it would be a better solution. I suppose I shouldn't be suprised that FB is smarter than I am! Edited by JimC |
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alstorer
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Joined: 02 Aug 07 Location: Cambridge Online Status: Offline Posts: 2899 |
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Posted: 08 Apr 09 at 12:48pm |
A heck of a lot more robust- if you look at the picture of it on land,it is supported only by the foils only whilst someone (if I picked up from SA right, Julian's son) is standing on the boat. |
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Al |
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Guest
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Joined: 21 May 04 Location: United Kingdom Online Status: Offline Posts: 0 |
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Posted: 08 Apr 09 at 12:54pm |
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49er is no feather weight either ...
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Flick-Flock
Posting king 
Joined: 27 Mar 09 Location: United Kingdom Online Status: Offline Posts: 102 |
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Posted: 08 Apr 09 at 5:48pm |
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What's the benefit of a bow rudder? The only reason i can thing of is, it allows them to have the main foils further back. But there must be a better, more complicated reason
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Swimming after Laser 5000 5069
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Medway Maniac
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Joined: 13 May 05 Location: United Kingdom Online Status: Offline Posts: 2788 |
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Posted: 08 Apr 09 at 7:32pm |
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My guess would be it's for assisted balancing a la bicycle when up on the foils. Well-used already in human-powered foiling boats. Edited by Medway Maniac |
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I luv Wight
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Joined: 28 Jan 05 Location: United Kingdom Online Status: Offline Posts: 628 |
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Posted: 08 Apr 09 at 8:22pm |
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I did something similar in a foiling moth 15 years ago ( when I had hair
 )A bow rudder linked with strings to the aft tiller and normal fixed blade. All foils retractable.   It sort of worked Ok, but need a lot more development work. ( since done by Brett Burvill, John Ilett and others.)  Here's another early moth foiler ( Ian Ward AUS ) with canard config, using the same principle of controlled ventilation on the front foil as the tomohawk foiler.  |
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pete_chinnock
Groupie 
Joined: 01 Jul 08 Location: United Kingdom Online Status: Offline Posts: 70 |
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Posted: 09 Apr 09 at 11:10am |
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Thats fairly impressive! I didnt realise that foiling had been around quite so long
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Pete
RS700 702 |
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JimC
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Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6662 |
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Posted: 09 Apr 09 at 11:40am |
Its been around a lot longer than that... First experiments with foil borne sailboats date back to the 1950s... There was a US Navy - honestly - project that certainly ran at good speeds in the 50s. The boat was called Monitor and there are claims for 40knots (seems rather unlikely to me - touch of the Albacore perhaps), although 30knots sustained seems possible. Weymouth Speed trials through the 60s turned up all sorts of more and less practical craft too... 
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