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- Contra-rotating abstract "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 opposite rotation. Contra-rotating propellers are also common in some marine transmission systems, in particular for large speed boats with planing hulls. Two propellers are arranged one behind the other, and power is transferred from the engine via planetary gear transmission. The configuration can also be used in helicopter designs termed coaxial rotors, where similar issues and principles of torque apply.Contra-rotating propellers should not be confused with counter-rotating propellers, a term which describes non-coaxial propellers on separate shafts; one turning clockwise and the other counter-clockwise. Tandem-rotor helicopters such as the CH-47 Chinook also use a counter-rotating arrangement.The efficiency of a contra-rotating prop is somewhat offset by its mechanical complexity. Nonetheless, coaxial contra-rotating propellers and rotors are moderately common in military aircraft and naval applications, such as torpedoes, where the added maintenance cost is not a primary concern.".
- Contra-rotating thumbnail Ka-32-SovietUnion-1989.jpg?width=300.
- Contra-rotating wikiPageExternalLink v=onepage&q&f=true.
- Contra-rotating wikiPageID "1054980".
- Contra-rotating wikiPageLength "5169".
- Contra-rotating wikiPageOutDegree "40".
- Contra-rotating wikiPageRevisionID "602380274".
- Contra-rotating wikiPageWikiLink ABB_Group.
- Contra-rotating wikiPageWikiLink Asea_Brown_Boveri.
- Contra-rotating wikiPageWikiLink Azimuth_thruster.
- Contra-rotating wikiPageWikiLink Azipod.
- Contra-rotating wikiPageWikiLink Boeing_CH-47_Chinook.
- Contra-rotating wikiPageWikiLink CH-47_Chinook.
- Contra-rotating wikiPageWikiLink Category:Propellers.
- Contra-rotating wikiPageWikiLink Coaxial_rotors.
- Contra-rotating wikiPageWikiLink Contra-rotating_propellers.
- Contra-rotating wikiPageWikiLink Convair_XFY.
- Contra-rotating wikiPageWikiLink Convair_XFY_Pogo.
- Contra-rotating wikiPageWikiLink Counter-rotating_propellers.
- Contra-rotating wikiPageWikiLink Epicyclic_gearing.
- Contra-rotating wikiPageWikiLink F-35_Lightning_II.
- Contra-rotating wikiPageWikiLink File:Mark-46-prop.jpg.
- Contra-rotating wikiPageWikiLink H-43_Huskie.
- Contra-rotating wikiPageWikiLink Helicopter.
- Contra-rotating wikiPageWikiLink Helicopter_rotor.
- Contra-rotating wikiPageWikiLink Inboard_Performance_System.
- Contra-rotating wikiPageWikiLink Intermeshing_rotors.
- Contra-rotating wikiPageWikiLink Jet_engine.
- Contra-rotating wikiPageWikiLink Kaman_HH-43_Huskie.
- Contra-rotating wikiPageWikiLink Lockheed_Martin_F-35_Lightning_II.
- Contra-rotating wikiPageWikiLink Lockheed_XFV.
- Contra-rotating wikiPageWikiLink Military.
- Contra-rotating wikiPageWikiLink Naval.
- Contra-rotating wikiPageWikiLink Navy.
- Contra-rotating wikiPageWikiLink Piston_engine.
- Contra-rotating wikiPageWikiLink Planetary_gear.
- Contra-rotating wikiPageWikiLink Reciprocating_engine.
- Contra-rotating wikiPageWikiLink Sailing.
- Contra-rotating wikiPageWikiLink Ship.
- Contra-rotating wikiPageWikiLink Ships.
- Contra-rotating wikiPageWikiLink Tail-sitter.
- Contra-rotating wikiPageWikiLink Tailsitter.
- Contra-rotating wikiPageWikiLink Tandem-rotor.
- Contra-rotating wikiPageWikiLink Tandem_rotors.
- Contra-rotating wikiPageWikiLink Torpedo.
- Contra-rotating wikiPageWikiLink Torque.
- Contra-rotating wikiPageWikiLink Transmission_(mechanics).
- Contra-rotating wikiPageWikiLink Turboprop.
- Contra-rotating wikiPageWikiLink VTOL.
- Contra-rotating wikiPageWikiLink Vertical_takeoff_and_landing.
- Contra-rotating wikiPageWikiLink Volvo_Penta.
- Contra-rotating wikiPageWikiLink File:Contrarotating.jpg.
- Contra-rotating wikiPageWikiLink File:Ka-32-SovietUnion-1989.jpg.
- Contra-rotating wikiPageWikiLinkText "Contra-rotating".
- Contra-rotating wikiPageWikiLinkText "Contra-rotating#Marine propulsion".
- Contra-rotating wikiPageWikiLinkText "contra-rotating propeller".
- Contra-rotating wikiPageWikiLinkText "contra-rotating".
- Contra-rotating hasPhotoCollection Contra-rotating.
- Contra-rotating wikiPageUsesTemplate Template:Main.
- Contra-rotating subject Category:Propellers.
- Contra-rotating hypernym Technique.
- Contra-rotating type Software.
- Contra-rotating type Component.
- Contra-rotating type Dynamic.
- Contra-rotating type Machine.
- Contra-rotating comment "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 opposite rotation. Contra-rotating propellers are also common in some marine transmission systems, in particular for large speed boats with planing hulls.".
- Contra-rotating label "Contra-rotating".
- Contra-rotating sameAs m.03bx2q4.
- Contra-rotating sameAs Motrotation.
- Contra-rotating sameAs Q5253262.
- Contra-rotating sameAs Q5253262.
- Contra-rotating wasDerivedFrom Contra-rotating?oldid=602380274.
- Contra-rotating depiction Ka-32-SovietUnion-1989.jpg.
- Contra-rotating isPrimaryTopicOf Contra-rotating.