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pushrod (plural pushrods)

1. (mechanical engineering) A rigid reciprocating rod that, by its movement, transmits force to actuate a mechanism.
   1. (automotive) A rod in a piston engine that actuates rocker arms above the cylinder head.
      • 2007 January 14, Don Sherman, “Making Modern Horsepower the Old-Fashioned Way”, in New York Times‎:

        The cam-within-a-cam concept has existed for decades, but perfecting it for production might just add another decade to the life of the pushrod engine.

   2. (cycling) A rod in an internal gear hub that actuates the shifting mechanism.
      • 2000, 2008, “Internal-Gear Hubs”, in Sheldon Brown's Bicycle Technical Info‎, archived from the original on 23 August 2019:

        An internal-gear hub with a hollow axle may be re-oiled by removing the pushrod or indicator spindle and squirting oil into the end of the axle.

      • 2018, “NEXUS 3-SPEED HUB w/Coaster Brake”, in Manuals & Technical Documents‎:

        Push Rod (81.85 mm) for Axle Length 168 mm

   3. (aviation) A rod used in the transmission of flight control inputs to an aircraft's control surfaces.
      • 2013 May, Bureau d'Enquêtes et d'Analyses pour la sécurité de l'aviation civile, “1.16.9.5: Known events”, in Report: Accident on 9 August 2007 off the coast of Moorea (French Polynesia) to the DHC6-300 registered F-OIQI operated by Air Moorea‎, archived from the original on 31 January 2021, page 55:

        On 17 August 2005, a Saab 2000, at the ramp, with controls locked, was subjected to jet blast of around 126 kt (233 km/h) from a passing B747. This resulted in the bending of the left aileron control pushrod, causing it to fail at the time of takeoff. The crew had to make an emergency landing.

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