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Windermere View Drop Down
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Posts: 7 		Post Options Post Options   Quote Windermere Quote  Post ReplyReply Direct Link To This Post Topic: New Britannia
    Posted: 19 Oct 20 at 4:20pm
Anyone got any ideas as to why the latest Britannia is such a strange shape?
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Grumpycat View Drop Down
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Posts: 497 		Post Options Post Options   Quote Grumpycat Quote  Post ReplyReply Direct Link To This Post Posted: 19 Oct 20 at 4:34pm
Not a clue . One can only assume it’s about helping it get foiling or about aerodynamics when foiling . Hopefully there are clever people on here that can give us the answers  Smile



Edited by Grumpycat - 19 Oct 20 at 4:46pm
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423zero View Drop Down
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Posts: 3419 		Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 19 Oct 20 at 8:49pm
Mono Hull, foils on either side lift out of the water, to reduce drag, the foils come together under Hull when going slowly, similar to normal yacht,over simplified, but basically correct.
Robert
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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: 20 Oct 20 at 6:59am
I think it's more the weird keel line, lumps and bumps which are puzzling people. I take it that the computer and clever people think it helps pop the hull early. I'm afraid the adage "if it looks right" will come back and bite them in the bum...
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Windermere View Drop Down
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Posts: 7 		Post Options Post Options   Quote Windermere Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 20 at 12:30pm
I reckon that the pre-start manoeuvres and slow speed performance will be irrelevant (unless its really light). Once up on the foils it will be a drag race.
It looks to me that the Brits will have got it very right or very wrong. It wont take long to find out. 
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GybeFunny View Drop Down
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Posts: 403 		Post Options Post Options   Quote GybeFunny Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 20 at 12:57pm
I believe the 'bustle' along the bottom is to end-plate the sails when foiling. It looks to me like it is designed with foiling very much in mind and not for floating about.
In this game you need to be bold and innovative and it certainly looks like that to me, I hope the gamble pays off (personally I think it will).
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Oli View Drop Down
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Posts: 1020 		Post Options Post Options   Quote Oli Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct 20 at 12:05pm
my take on its for end plate effect and aero, and also acts as a "moth hull" as in low wetted area compared to the large surface area of the rest of the boat for those touch down moments.

of course could be totally wrong.
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jaydub View Drop Down
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Posts: 267 		Post Options Post Options   Quote jaydub Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct 20 at 12:44pm
The new Luna Rossa seems to have gone down the same design routee with an extended longitudinal bustle, albeit not as extreme as Brittania RB2.  I hope Brittania is quick in a straght line as I suspect that it isn't going to be very agile manoevering at sub-foiling speeds.
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Jack Sparrow View Drop Down
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Posts: 2965 		Post Options Post Options   Quote Jack Sparrow Quote  Post ReplyReply Direct Link To This Post Posted: 27 Nov 20 at 11:34am
This video should help explain the underwater profiles a bit.

https://www.youtube.com/watch?v=xpys4jTkfUY&t=273s


Here's a shot taken at the Kiwi launch event by my 2nd Cousin who's the Auckland Marina Coordinator, for detailed comparison. ©SarahBarrell




Edited by Jack Sparrow - 27 Nov 20 at 11:36am
Farr 3.7 Class Website
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fleaberto View Drop Down
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Posts: 302 		Post Options Post Options   Quote fleaberto Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 20 at 12:38pm
Originally posted by Windermere

It looks to me that the Brits will have got it very right or very wrong. It wont take long to find out. 
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