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2. Counter-rotating propellers - Wikipedia

   en.wikipedia.org/wiki/Counter-rotating_propellers

   Counter-rotating propellers World War I Linke-Hofmann R.I German heavy bomber (1917) with counter-rotating propellers He 177A Greif with 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.

3. 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 ...

4. Eipper Quicksilver - Wikipedia

   en.wikipedia.org/wiki/Eipper_Quicksilver

   Quicksilver MX Quicksilver MX II Sprint two seater Quicksilver Sport 2S, showing its struts, in place of wire bracing Quicksilver C The C model was the earliest powered version and consisted of the Quicksilver hang glider, including the weight-shift sling seat, with a McCulloch MAC 101 powerplant of 12 hp (9 kW), a V-belt reduction drive and a 1.7 US gal (6 L) fuel tank.

5. Contra-rotating - Wikipedia

   en.wikipedia.org/wiki/Contra-rotating

   A Mark 46 Mod 5A torpedo is inspected aboard a destroyer in April 2005. Contra-rotating propellers have benefits when providing thrust for boats for the same reasons. ABB provided an azimuth thruster for ShinNihonkai Ferries in form of the CRP Azipod, [1] claiming efficiency gains from the propeller (about 10% increase [2]) and a simpler hull design.

6. List of aircraft propeller manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_aircraft_propeller...

   Haw Propeller - Germany; Helices E-PROPS - Electravia - France (2008–present) Hélices Halter - France (1987-2014) Hamilton Standard - United States (1929-1999) Hamilton Sundstrand - United States (1999-2012) Hartzell Propeller - United States (1917–present) Hegy Propellers - United States; Heine Propellers - Germany; Helix-Carbon - Germany ...

7. List of pusher aircraft by configuration and date - Wikipedia

   en.wikipedia.org/wiki/List_of_pusher_aircraft_by...

   A pusher aircraft is a type of aircraft using propellers placed behind the engines. Pushers may be classified according to lifting surfaces layout (conventional or 3 surface, canard, joined wing, tailless and rotorcraft) as well as engine/propeller location and drive. For historical interest, pusher aircraft are also classified by date.