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Contra-rotating propellers are used on torpedoes due to the natural torque compensation and are also used in some motor boats. The cost of boring out the outer shafts and problems of mounting the inner shaft bearings are not worth pursuing in case of normal ships .
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 ...
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 propellers rotating in opposite directions but sitting apart from each other on separate shafts instead of ...
The T56-A-427 was capable of 5,912 prop shp (4,409 kW), but it was torque-limited to 5,250 prop shp (3,910 kW). [9] The Lockheed Martin C-130J Super Hercules which first flew in 1996, has the T56 replaced by the Rolls-Royce AE 2100, which uses dual FADECs (Full Authority Digital Engine Control) to control the engines and propellers. [10]
The propeller system was designed for ultralight trikes and powered parachutes. The latter are especially sensitive to torque effects and the propeller design addresses that issue. [1] [2] The design has two propellers, each with two composite, ground adjustable blades and uses a 3.7:1 gear box type reduction drive. The two propellers are ...
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A hybrid of the AE 2100A and AE 2100D3, sporting the torque-meter and interconnecting struts from the AE 2100A and the gearbox-mounted accessory gearbox from the AE 2100D3; also uses a stronger reduction gearbox, a Dowty six-bladed propeller for higher loads, and modified inlet and bypass section positioning to mitigate seawater ingestion; [26 ...
The Alamo Bowl will be a glorified Big 12 game. The bowl announced which schools it is considering for the Dec. 28 game on Thursday.And all four of them are in the Big 12. Iowa State, BYU, Arizona ...