Model making; including workshop practice, design and construction of models, a practical treatise for the amateur and professional mechanic .. (1919)
Yates, Raymond F. (Raymond Francis), 1895- ed · New York, The Norman W. Henley Pub. Co. · leaf 323
herer. The other side ofthe coherer is connected with a heav^^ wire that leads 320 Model Engineering down througli the hull and makes electrical connectionwith the lead keel. The ballast tanks in the lower part of the hull are ofsufficient size to hold water to completely submerge themodel. A piece… … rig. 230—Drawing of the hatches escape, with the result that water enters. When themodel is ^*trimmed by the bow and stern, the pet cocksmay be closed, thereby preventing the entrance of morewater. To discharge the water ballast, air pressure isapplied to the pet cocks by means of rubber tubing…
Machinery
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