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NPMR
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Reged: 14/02/2006
Posts: 754
Loc: Cornwall
How much 'thumping' aground could your boat take?
      #1960360 - 14/08/2008 09:57

Looking at the post re the boat ashore in Devon, I'm reminded of the time (before visitor's moorings) we had dragged two anchors all over St Marys Harbour in the Isles of Scilly and ended up mooring against and then drying out on the harbour wall (right up by the dinghy landing area).

Possibly the most depressing sailing experience I can recall.

We were stuck there for 3 days and took the ground twice a day. The hard landings went on for about 20-35 mins and shook the poor old boat very hard - Cutlass 27 with long keel. It was diabolical.

Also hit hard sand (didn't stick, luckily) off Thames Estuary.

I would not think my present boat with a fin keel would take this sort of pounding. It feels bad enough when we lean against the club wall for scrubbing and there are ripples - let alone swell!

--------------------
Is it my age or the age I live in, that makes me question everything?


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graham
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Reged: 16/05/2001
Posts: 6383
Loc: South Wales
Re: How much 'thumping' aground could your boat take? [Re: NPMR]
      #1960433 - 14/08/2008 11:04

I was in Minehead harbour dried out when an unforecasted wind change brought the swell in as we refloated.

It was dire,no damage occured but the pounding was violent for 15 minutes until we could motor out.I even worried about the shock loadings on mast and rigging.

Another boat moored near us had a woman aboard who became hysterical and screamed every time the boat pounded
this didnt help to ease the tense atmosphere.

I think older boats with heavy grp layup and longer keels to spread the load more must be better able to stand this sort of punishment than newer lighter ones.

--------------------
http://banjocoronado25.blogspot.com/

One mans junk is another mans treasure.Recycle it with http://groups.yahoo.com/group/Marinaskip/


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MarkG
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Reged: 01/11/2002
Posts: 531
Loc: al shops, local people
Re: How much 'thumping' aground could your boat take? [Re: graham]
      #1960438 - 14/08/2008 11:10

Quote:

Another boat moored near us had a woman aboard who became hysterical and screamed every time the boat pounded
this didnt help to ease the tense atmosphere.





I presume the hysterical screaming was due to the boat pounding and not some other activity?


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graham
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Reged: 16/05/2001
Posts: 6383
Loc: South Wales
Re: How much 'thumping' aground could your boat take? [Re: MarkG]
      #1960444 - 14/08/2008 11:14

Dont know but afterwards they were both sat in the cockpit sharing a fag

--------------------
http://banjocoronado25.blogspot.com/

One mans junk is another mans treasure.Recycle it with http://groups.yahoo.com/group/Marinaskip/


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tangomoon
regular


Reged: 18/10/2004
Posts: 1929
Loc: SW
Re: How much 'thumping' aground could your boat take? [Re: NPMR]
      #1960535 - 14/08/2008 12:42

We were in Green Bay Bryher - jockeying for position with the French boats who were also stuck there.

We spent four weeks mostly there sometimes 51 knots of wind screaming in the rigging

lots of gale 8 - OK unless from the S/SE and N ish - when swells came in and dropped us on the hard bottom for about ten or so minutes over more than a dozen tides.

It was tooth jarring.

I would never buy a French boat for the following reasons

French boats were mostly fin with legs - subject to the same punishment - I would have been really worried

Two landed up on he rocks - didn't bat an eyelid

Another French would SAIL in

work their way around everybody (there's not much room between rocks and boats and boats and boats)

They would stop -

sling out the anchor

drag out the inflatable

everybody pile in

land and without a backward glance

disappear off for a meal and a drink

Made us feel way over-protective of our boat

One night we were in two out of 11 boats there not to drag their anchor

--------------------
Sunshine or Thunder - A man will always wonder where - the fair wind blows


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gwylan
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Reged: 31/05/2007
Posts: 403
Loc: Portishead, on tour
Re: How much 'thumping' aground could your boat take? [Re: NPMR]
      #1960551 - 14/08/2008 12:54

1 - what a twerp, or is he a genius?
2 - the boat can always take more than me. It seems to hurt me every time she bumps. And you sit there waiting for something to break with the next bump.
How can sand be soo hard?

--------------------

The pessimist complains about the wind;
the optimists expects it to change;
the realist adjusts the sails


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da_ron
regular


Reged: 17/01/2007
Posts: 149
Loc: Plymouth, D-heaven
Re: How much 'thumping' aground could your boat take? [Re: gwylan]
      #1960592 - 14/08/2008 13:23

This happened to me off Cawsand when I misjudged the tide by about 20cms. There were tiny 4" waves coming in which lifted my bilge keeler enough to bang back down again. A very tense and worrying hour. Like you say - how can sand be so hard!
But she's 20+ years old - she's probably had worse in her time!!

--------------------
I'd rather be scared to death than bored to death


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malcb
regular


Reged: 21/02/2004
Posts: 1942
Loc: Chichester
Re: How much 'thumping' aground could your boat take? [Re: NPMR]
      #1960791 - 14/08/2008 16:03

I've learnt from someone in the Virgo Owners Assoc that My boat was for 12 months moored on a beach for 12 months, so the tide came in and went out twice a day and the boat must have been bumped up and down on the beach some 700 times over that year. Guess what? No damage. It's a triple keeler, with a centre stub keel some 4/6 inches deeper that the bilge keels, so that probably took the bumping.

Recently I went aground, slightly, while cutting a corner into Hayling Bay (don't ask why, but it was a good reason at the time). Well 'bumpety, bump' as the centre keel took the shock. Spun the boat round and crept back out again

--------------------
Virgo Owners Association


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Searush
regular


Reged: 14/10/2006
Posts: 4452
Loc: k up if caught.
Re: How much 'thumping' aground could your boat take? [Re: malcb]
      #1961111 - 14/08/2008 21:37

Most drying moorings are set up in places where either there is soft mud under keel or there is a sand bar or some other shelter available before the boats take the ground. I have been on drying moorings & in drying harbours for over 25 years and seldom even wake up when she takes the ground or lifts. In fact it is difficult to tell sometimes if tide is in or out without looking.

On the other hand, groundings on hard sand without shelter are a nightmare of teeth rattling bumps & grinds for at least 20 mins on each lift/ settle.

Note that deep soft mud can do considerable damage by forcing bilge keels to flex out on settling & sucking them inwards on lifting. Some of the Laurent Giles Westerlies are susceptible to this sort of damage.

--------------------
Boaty junk clogging up your shed or lockers? Chuck it in Marinaskip

Want a used bike, spares or repairs in Staffordshire? Visit http://back2bikes.org.uk/


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