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2. Contra-rotating propellers - Wikipedia

   en.wikipedia.org/wiki/Contra-rotating_propellers

   Contra-rotating propellers Contra-rotating propellers on the Rolls-Royce Griffon-powered P-51XR Mustang Precious Metal at the 2014 Reno Air Races. Aircraft equipped with contra-rotating propellers (CRP) [1] coaxial contra-rotating propellers, or high-speed propellers, apply the maximum power of usually a single piston engine or turboprop engine to drive a pair of coaxial propellers in contra ...

3. Counter-rotating propellers - Wikipedia

   en.wikipedia.org/wiki/Counter-rotating_propellers

   Counter-rotating propellers (CRP) are propellers which turn in opposite directions to each other. [1] They are used on some twin- and multi-engine propeller-driven aircraft. The propellers on most conventional twin-engined aircraft turn clockwise (as viewed from behind the engine). Counter-rotating propellers generally turn clockwise on the ...

4. Category:Aircraft with contra-rotating propellers - Wikipedia

   en.wikipedia.org/wiki/Category:Aircraft_with...

   Aircraft whose primary form of thrust is derived from a piston engine or turboprop driving contra-rotating propellers. Pages in category "Aircraft with contra-rotating propellers" The following 63 pages are in this category, out of 63 total.

5. Contra-rotating - Wikipedia

   en.wikipedia.org/wiki/Contra-rotating

   Contra-rotating, also referred to as coaxial contra-rotating, is a technique whereby parts of a mechanism rotate in opposite directions about a common axis, usually to minimise the effect of torque. Examples include some aircraft propellers , resulting in the maximum power of a single piston or turboprop engine to drive two propellers in ...

6. Propeller (aeronautics) - Wikipedia

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

   Contra-rotating propellers are used. The propellers designed are more efficient than turbo-fans and their cruising speed (Mach 0.7–0.85) is suitable for airliners, but the noise generated is tremendous (see the Antonov An-70 and Tupolev Tu-95 for examples of such a design).

7. Kuznetsov NK-12 - Wikipedia

   en.wikipedia.org/wiki/Kuznetsov_NK-12

   The exhaust ports of a NK-12 in an outboard nacelle on a Tu-95. The Kuznetsov NK-12 is a Soviet turboprop engine of the 1950s, designed by the Kuznetsov design bureau.The NK-12 drives two large four-bladed contra-rotating propellers, 5.6 m (18 ft) diameter (NK-12MA), and 6.2 m (20 ft) diameter (NK-12MV).