Monday, 30 November 2015

COAL.

The bunker coal is shown in the abstracts of the engineer's log, and can be, at least partly, checked from the coal vouchers. 

Of the coal on board leaving the Thames, 637 tons were left on arrival at Adelaide. At Sydney 2,053 tons of coal were taken in, and at Melbourne 163 tons. At Adelaide on return 180 tons were bought. To Adelaide 799 tons were consumed, and from thence to Durban 1,785 tons. At Durban 1,929 tons 6 cwt. of coal were taken in. There was thus on board a total of 2,378 tons 6 cwt. Mr. Lund, probably correctly, estimated her consumption whilst in Durban at between 20 and 30 tons, which would leave her with, in round figures, 2,350 tons when she sailed from that port. 

By this stage, Captain restricted total coal to 2350 tons, compared with 3456 tons, when the Waratah departed London. Clearly, as was confirmed by GM calculations made with reserve 'tween deck bunkers without coal, sorting out the issue of coal had contributed very significantly to a more stable Waratah. The downside of this equation came in the form of 340 tons of coal on the spar deck which reduced GM. However, by the time the Waratah departed Durban for the last time, GM was significantly bolstered by reducing centre of gravity in the form of deeply loaded and significant dead weight.

IMPORTANT:

http://waratahrevisited.blogspot.co.za/2016/04/3456-tons-of-coal-outbound-revisited.html




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