Equipment Identification Needed

Post here about equipment carried on ships
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ivorthediver
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Re: Equipment Identification Needed

Unread post by ivorthediver »

Ok Harry I have asked Keith on Marine engineering thread if he can help us , I'm sure one of us can find it eventually :oops:
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Little h
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Re: Equipment Identification Needed

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ivorthediver wrote: Wed Aug 12, 2020 8:28 pm Ok Harry I had a look in my copies of M of S vol 1 and 2 and 3 [1951] but no reference to the formula or rating tables was found by me , so is this the kind of thing Keith might know :idea:
M of S Vol1 151 chapter VIII pages 204-207 deals with the capstan on Cruisers and Destroyers and since they were steam driven I presume Keith may well know.
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Little h
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Re: Equipment Identification Needed

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Suggest you Google PDF titled A3 Anchor windlass design and testing A3 - IACS - especially chapter only 6 pages ... pulling load starts on page 3 of 6
ur-a3rev1.pdf

Note that anchorage depth is part of the calculation, see:-
The values of the above table are applicable when using ordinary stockless anchors for anchorage depth down to 82.5 m. For anchorage depth deeper than 82.5 m, a continuous duty pull Zcont2 is............

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Quite obvious really (in hindsight); because the combined weight of all links of the anchor chain at the anchorage depth is all that is being pulled (hoisted) until the anchor is free - then add the weight of anchor to the weight of chain at anchorage depth (deminishing as it is raised to the aweigh position.
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ivorthediver
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Re: Equipment Identification Needed

Unread post by ivorthediver »

ok Harry so on the basis of what we now know , a type 45 anchor is 30.000 in weight and needs a cable equal to at least 3 times the depth of water it intends to anchor in in order to maintain a hold or purchase on [ hence the 85m example referred to earlier ] but dont know the chain dims to calculate the cable weight :oops:
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Pelican
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Re: Equipment Identification Needed

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The following may be of interest.
I wonder why the starboard cable is shorter than the port?
Is this common to all R.N. ships?
I seem to remember posting a video of one of the QEC's anchor's being raised filmed on the 'cable deck' ?

ANCHORS AWEIGH ON HMS QUEEN ELIZABETH AS CARRIER TESTS ICONIC WEIGHTS

The mighty anchors on Britain’s biggest warship have been tested for the first time.

Nearly as the heavy as the jets which will operate from HMS Queen Elizabeth, the 13-tonne anchors were lowered on the carrier and into the huge basin in Rosyth where she is being completed.

The trial involving engineers from the Aircraft Carrier Alliance, who are building the 65,000-tonne leviathan, and the ship’s seamanship specialists who’ll be in charge of anchoring and mooring Queen Elizabeth, was the latest in a series of tests gradually preparing the future flagship for sea next year.

Engines have been fired up as have the generators, radars have been installed and flashed up, and soon the aircraft lifts – designed to take two F-35B Lightning II jets from the hangar to the flight deck – will be put through their paces.

For the seamanship team, however, observing the anchors at work was the highlight of Queen Elizabeth’s trials so far.

To raise and lower the two anchors, the ship relies on even heavier cables of shackles – huge metal links.

The port cable is more than 1,300ft long – 400ft longer than the carrier herself – and weighs around 90 tonnes (more than six Merlin helicopters).

The starboard chain is slightly shorter and lighter (a mere 1,125 ft and 75 tonnes – or the weight of about five London buses).

“At 65,000 tonnes, everything about these ships is on a larger scale and the anchors are no different,” explained Chief Petty Officer Jay Early, Queen Elizabeth’s bosun, responsible for seamanship,

“Moving the anchor for the first time is a huge milestone in the programme and it was fantastic to watch it in motion as it was lowered into the water and back up again.

“For the newest joiners in my team, this was the first time they have actually seen the kit and there is no better way to learn than by doing.

“This is a great step forward as we continue to prepare the ship and make her ready for sailing next year.”The port cable is more than 1,300ft long – 400ft longer than the carrier herself – and weighs around 90 tonnes (more than six Merlin helicopters).

The starboard chain is slightly shorter and lighter (a mere 1,125 ft and 75 tonnes – or the weight of about five London buses).

“At 65,000 tonnes, everything about these ships is on a larger scale and the anchors are no different,” explained Chief Petty Officer Jay Early, Queen Elizabeth’s bosun, responsible for seamanship,

“Moving the anchor for the first time is a huge milestone in the programme and it was fantastic to watch it in motion as it was lowered into the water and back up again.

“For the newest joiners in my team, this was the first time they have actually seen the kit and there is no better way to learn than by doing.

“This is a great step forward as we continue to prepare the ship and make her ready for sailing next year.”The port cable is more than 1,300ft long – 400ft longer than the carrier herself – and weighs around 90 tonnes (more than six Merlin helicopters).

The starboard chain is slightly shorter and lighter (a mere 1,125 ft and 75 tonnes – or the weight of about five London buses).

“At 65,000 tonnes, everything about these ships is on a larger scale and the anchors are no different,” explained Chief Petty Officer Jay Early, Queen Elizabeth’s bosun, responsible for seamanship,

“Moving the anchor for the first time is a huge milestone in the programme and it was fantastic to watch it in motion as it was lowered into the water and back up again.

“For the newest joiners in my team, this was the first time they have actually seen the kit and there is no better way to learn than by doing.

“This is a great step forward as we continue to prepare the ship and make her ready for sailing next year.”
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ivorthediver
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Re: Equipment Identification Needed

Unread post by ivorthediver »

Thank you David , very interesting info on the Anchors/ cable weights , but I assume the links are larger than the D45 so cant correlate a comparison
I fear , but thanks anyway for your help .
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