Rossiter Pintail Mortagne sur Gironde, near Bordeaux |
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Laser 28 - Excellent example of this great design Hamble le rice |
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Laser 140101 Tynemouth |
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More weird sailing science Igrf style.. |
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iGRF ![]() Really should get out more ![]() ![]() Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6499 |
![]() ![]() ![]() ![]() Posted: 23 May 14 at 10:54am |
So, in my constant quest to seek ideas that would make vertically prejudiced yet strangely handsome helms perform adequately despite the passage of years, I put a suggestion to a fellow traveller in my office the other day, and it seems it's already been adopted, or may yet be taken up by no less than the AC team.
The suggestion was the effect a decent sized gyroscope might have to combat heeling, which is of course the lightweights nemesis. So I was pleasantly surprised to learn that not only was it in consideration but, if I have gotten the right end of the stick, using regenerative power apparently the F1 lot are considering a system that if permitted by the rules, they'll use eventually to do away with the grinding to control the various systems. All very futuristic stuff, but if this flywheel system also works like a gyroscope it can allegedly reduce say a 15 degree heel to as little as 4 if my source is correct. Now if this is going on, there must have been some previous experience, I can't believe it has only just come about, so the question is has anyone seen or heard of it, and could it be used at our level? An interesting development I thought. |
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ellistine ![]() Really should get out more ![]() ![]() Joined: 06 Mar 08 Online Status: Offline Posts: 762 |
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I think for a while one of the Oracle AC45's sported a bulge at the bottom of it's wing mast that was reputed to contain some sort of Giro. Williams F1 did also develop a spinning flywheel for storing power. They never used it in F1 although I think Porsche adopted it as did some bus companies!
![]() Edited by ellistine - 23 May 14 at 11:19am |
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Cameron Winton ![]() Groupie ![]() Joined: 08 Nov 11 Location: Prestwick Online Status: Offline Posts: 41 |
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Renault had a "Mass damper" for a while until it got banned. Basically a weight on a rod that used inertia to help control pitch
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I luv Wight ![]() Really should get out more ![]() ![]() Joined: 28 Jan 05 Location: United Kingdom Online Status: Offline Posts: 628 |
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An experiment to try to show the forces - spin a bike wheel up, ( removed from a bike ) holding either side of the axle, then let go of one side - it stays up!
And now turn your body to the side - oh dear - it resists the turning, but goes all weird and leans over. a more extreme version : here's some 'antigravity' from Eric Laithwaite http://youtu.be/MHlAJ7vySC8 |
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There are ships that use anti-roll gyros.
http://m.youtube.com/watch?v=SNJ88mBusbE |
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JimC ![]() Really should get out more ![]() ![]() Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6662 |
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Ah, Prof Laithwaite and his gyros. No way you'd be allowed to do that stuff now. Remember stories of the college safety officer turning white when the Prof mentioned they'd done the sums and if he dropped the thing it would probably go through the wall of the lecture theatre because there was so much stored energy.
Also remember the head to head between him and one of the Physics Department people after one of his demos. There was always a bit of a gap between the engineers and the pure scientists at IC in my day... |
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iGRF ![]() Really should get out more ![]() ![]() Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6499 |
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So the next question is how heavy or how much mass would a wheel have to be at the base of the mast, to prevent say the new D zero from heeling and thereby doing away with all that hiking nonsense?
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JimC ![]() Really should get out more ![]() ![]() Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6662 |
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Very heavy or rotating very quickly. It would also make changing course rather interesting... I don't think I'm even capable of working out what the effects of the heeling force will be in terms of precession - certainly not without a considerable amount of study.
Edited by JimC - 23 May 14 at 2:50pm |
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Punky ![]() Groupie ![]() Joined: 11 Feb 14 Online Status: Offline Posts: 90 |
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Stick four powerballs down each side and try it!
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iGRF ![]() Really should get out more ![]() ![]() Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6499 |
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I don't see changing course in the horizontal plane should present any problem, obviously keeping the thing spinning and carrying the extra weight would probably negate the advantage, unless of course it was compensated for by extra sail area which is what the lightweight needs to be able to carry but can't.
It would also prevent for and aft pitching. The ideal counter measure for spinnakers lifting the nose. ![]() |
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