Page:Popular Science Monthly Volume 91.djvu/80

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Popular Science Monthly

EXPANSION SPACES TO, ALLOW OIL TO EXPAND

���FUEL OIL IN TANKS ON \

BOTH SIDES TOIPRO-

TECT BOILERS AND

ENGINE 'A

The typical oil-tank steamship shown in section at the top and the proposed freighter beneath it indicate the great similarity between the two types. The oil tanks are practically made over into cargo holds. The small transverse section of the boiler and engine room of the upper diagram shows its vulnerability to torpedo attack in that portion of the ship. The lower diagram shows how the vitals in a similar section of the proposed ship will be protected by means of fuel-oil tanks

���In the proposed freighter, the hull will be divided into a dozen or more small compartments and the engines and boilers will be protected by means of fuel-oil tanks extending clear around

�� �