Steam Yachts And Launches, Their Machinery And Manegement: a Review of the ...
Steam Yachts And Launches, Their Machinery And Manegement: a Review of the ...
C P Kunhardt
The book Steam Yachts And Launches, Their Machinery And Manegement: a Review of the ... was written by author C P Kunhardt Here you can read free online of Steam Yachts And Launches, Their Machinery And Manegement: a Review of the ... book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Steam Yachts And Launches, Their Machinery And Manegement: a Review of the ... a good or bad book?
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In several tests made under different conditions in a steam yacht with one of these screws, 6 ft. diameter, 9 ft. pitch, a gain of three per cent, was made over the speed of other screws. They leave the water behind comparatively smooth, and do not churn it up, neither does a vessel propelled by this style of screw have a tendency to settle aft, and there is less vibration and trem- bling on the vessel. The Duncan propeller, made by Messrs. Ross & Duncan, of Glasgow, Scotland, is very favorably... known for its excellent results. I04 The Screw. The blades are formed to a combination of curves, and are not of the plain helical construction. The chief peculiarity is a quick curvature near the tips, concave to the driving side, as can be seen in the illustration. This form was adopted, because all propellers act with a certain amount of slip, necessary to give the propulsive reaction, and there is always a corresponding amount of centrifugal action on the water. Fig. 56. — Duncan's Patent Screw Propeller.
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