KSIĄŻKI POWIĄZANE ZE SŁOWEM «CONTRAPROPELLER»
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Transactions of the Society of Naval Architects and Marine ...
With regard to details, it might be mentioned that, after completing the tank
research program, a supplementary examination was made as to the possible
effect of forming the boss brackets according to the Star contrapropeller patents.
The Contrapropeller, which also serves as the rudder post, is a steel casting in
one piece, riveted through two flanges to corresponding flanges which are a part
of the stern frame. No portion of the Contrapropeller or stern frame need be ...
Alexander J. Dickie, Frank A. Stanley, 1936
Contrapropeller and Towing Capacity of Tugs f~\ F late a number of experiments
have ^ been made in Germany with tugboats, which prove that the merits of
contrapro- pellers are especially observable on such craft, because their screw ...
A — End view of a four-bladed contrapropeller. B — Side view of four-bladed
contrapropeller and rudder. C — Two-bladed contrapropeller and a streamlined
rudder. D — Two-bladed contrapropeller and a contrarudder. BASEBALL IN THE
...
Service data obtained from vessels that are Contrapropeller or Contrarudder
equipped has corroborated the results found in the model basin. For example,
tank tests made with the model of the S. S. Pennsylvanian of the American
Hawaiian ...
This reaction comes from the spiral slipstream striking surfaces that are angled to
divert the water aft and this makes the contrapropeller try to move ahead in a
combination of forces which is exactly contrary to the action of the usual propeller
.
The function of the stationary portion (contrapropeller) of the contra-rudder is to
collect the discharge and deflect it in a straight rearward direction. Consequently
the entrance angle given to the various contrapropeller sections must be the ...
In cases where a contrapropeller is not fitted, the turning impulse contained in the
propeller jet is not utilized for providing movement to the ship ; the energy
corresponding to it is therefore wasted, and produces an unavoidable increase of
the ...
First American Installation of Contrapropeller A contrapropeller has been
attached to the American steamer Norfolk, of the Coastwise Transportation
Company, to improve her steering and effect fuel economies. This is probably the
first ...
Contrapropeller Question: What are advantages of equipping a ship with a
contrapropeller? Answer: Past experience with existing installations definitely
show that a saving in fuel can be effected, or an increase of speed on the same
fuel ...
