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Old 06 December 2006, 10:16   #21
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November saw loadsa wind in holland inc one day with 12 metre waves and a peak of 20m according to the wave buoy which is now being checked for accuracy. Same day saw a KNRM (royal netherland lifeboat institution) 62ft rib lifeboat do three complete rolls in a minute and a half whilst on service. First one with the wheelhouse door open-and they are test rolled only with it shut to maintain the air pocket-but it did come up again!
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Old 06 December 2006, 11:00   #22
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I went along Sandbanks road in Poole today and it was a bit depressing- 2 boats up on the marshy bit with no anchors out and several bows poking up from the watery depths

Looks like they had a nasty one.
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Old 06 December 2006, 12:24   #23
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November saw loadsa wind in holland inc one day with 12 metre waves and a peak of 20m according to the wave buoy which is now being checked for accuracy. Same day saw a KNRM (royal netherland lifeboat institution) 62ft rib lifeboat do three complete rolls in a minute and a half whilst on service. First one with the wheelhouse door open-and they are test rolled only with it shut to maintain the air pocket-but it did come up again!
Thats the problem with these self righting boats - more likely to tip in the first place - bit like a beachball really!!!
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Old 07 December 2006, 12:42   #24
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Thats the problem with these self righting boats - more likely to tip in the first place - bit like a beachball really!!!
I'm not sure I understand the logic in that?
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Old 07 December 2006, 12:49   #25
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I'm not sure I understand the logic in that?
Basically the self righting comes from the design of the superstructure - big volume on top means that there is more buoyency above the waterline than below. Of course this also puts more weight aloft as well which makes them more top heavy.

In a way not a problem becuase they will always come back the right way up but it does make for a rolly polly sort of ride.
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Old 07 December 2006, 12:53   #26
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And talking of windy - 88mph today and guess what - more lashing rain. Off to check the boat again.

Actually some damage around today - Aberavon sea front closed due to flying debris - drove past and the sea is incredible - a surfers delight but none out funnily enough....

Still they had it worse in London today - a tornado!!!

http://news.bbc.co.uk/1/hi/england/london/6217514.stm

Suprisingly Britain gets more tornados than the USA for it's size.
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Old 07 December 2006, 13:55   #27
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Hi codders, nice one with that "city" most slick.

How come London gets everything? lucky Bast...ds.

Kinda amazing I would think. "here she comes,just rolling down the street, singing do we do we do we dom do we day" looks Tall! looks High sent a car into the sky! ...... sort of thing.

Ya just gotta have a sense of humour....
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Old 07 December 2006, 15:22   #28
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Basically the self righting comes from the design of the superstructure - big volume on top means that there is more buoyency above the waterline than below. Of course this also puts more weight aloft as well which makes them more top heavy.

In a way not a problem becuase they will always come back the right way up but it does make for a rolly polly sort of ride.
I accept that increased water tight superstructure will raise the CoG - but presumably one can at least partially counteract this with extra below water line balast.

They presumably can't be top heavy or they wouldn't come back up again when they do capsize.

So - they are really nothing like a beachball - which has no right way up, and which has its CoG right at the centre.
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Old 07 December 2006, 17:47   #29
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I accept that increased water tight superstructure will raise the CoG - but presumably one can at least partially counteract this with extra below water line balast.

They presumably can't be top heavy or they wouldn't come back up again when they do capsize.

So - they are really nothing like a beachball - which has no right way up, and which has its CoG right at the centre.
Alright maybe not a beach ball but one of those weebel things - they always wobble but they don't fall down!!!
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