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The Drydock - Episode 295 (Part 1)

🕑 Added 2024-04-27 11:00:08 +0000 UTC
The Drydock - Episode 295 (Part 1)

Comments

Peter Navarch

Starting air, for slowing, stopping and reversing an engine, would have been a poor substitute for astern steam.

Peter Navarch

How long to reverse - highly dependent on the installation involved, and the procedures available and developed for slowing and stopping the ahead rotating engine, and building up the astern rotation. Note that the driving force on the propeller, shafting and engine from the ship's forward motion are quite substantial. Shaft brakes have been fitted to address this issue.

Peter Navarch

Royal Navy and derivatives traditionally worked the 5 x 4 hour + the 2 x 2 hour (dog) watches, plus day work for forenoon and afternoon off watch sailors. This with crews/departments split into 3 watches, plus non-watchkeeping day workers. The dog watches gave a day by day change of watches for the watchkeepers. I believe merchant marines commonly worked 12 - 4, 4 - 8 and 8 - 12, on 3 watches, non-rotating.

Peter Navarch

Boilermakers/platers worked alongside the shipwrights, on different areas of the vessel's structure. I believe there are/were shipwrights in the Royal Navy; branch badge crossed maul and adze. Shipwrights were also in small numbers in merchant vessels. These men were essentially shore trained before going to sea. Shipwrighting covered such a wide variety of work that skills and experience depended widely upon specific training and work experience. Shipwrighting was the lead trade for the construction of wooden vessels, with recent application into replica vessels. DUYFKEN and ENDEAVOUR are 2 examples of recent wooden vessels built primarily by shipwrights in Western Australia.


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