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2. Propeller (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Propeller_(aeronautics)

   While a propeller may be tested in a wind tunnel, its performance in free-flight might differ. At the Langley Memorial Aeronautical Laboratory, E. P. Leslie used Vought VE-7s with Wright E-4 engines for data on free-flight, while Durand used reduced size, with similar shape, for wind tunnel data. Their results were published in 1926 as NACA ...

3. Propeller - Wikipedia

   en.wikipedia.org/wiki/Propeller

   An advanced type of propeller used on the American Los Angeles-class submarine as well as the German Type 212 submarine is called a skewback propeller. As in the scimitar blades used on some aircraft, the blade tips of a skewback propeller are swept back against the direction of rotation. In addition, the blades are tilted rearward along the ...

4. Propeller theory - Wikipedia

   en.wikipedia.org/wiki/Propeller_theory

   Propeller theory is the science governing the ... but is usually simple to compensate for with the aircraft's rudder. ... is the ratio of the linear dimensions ...

5. Toroidal propeller - Wikipedia

   en.wikipedia.org/wiki/Toroidal_propeller

   A simple 3 blade toroidal propeller. A toroidal propeller is a type of propeller that is ring-shaped with each blade forming a closed loop. The propellers are significantly quieter at audible frequency ranges, between 20 Hz and 20 kHz, while generating comparable thrust to traditional propellers.

6. Ship measurements - Wikipedia

   en.wikipedia.org/wiki/Ship_measurements

   Shaft Horsepower (SHP) – The amount of mechanical power delivered by the engine to a propeller shaft. One horsepower is equivalent to 746 Watts. Tonnage – a number derived from any of several methods to calculate the volume or other number indicative of a ship's cargo carrying capacity.

7. Variable-pitch propeller (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Variable-pitch_propeller...

   A constant-speed propeller is a variable-pitch propeller that automatically changes its blade pitch in order to maintain a chosen rotational speed, regardless of the operational conditions of the aircraft. This is achieved by use of a constant-speed unit (CSU) or propeller governor, which automatically changes the propeller's blade pitch.