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  2. Counter-rotating propellers - Wikipedia

    en.wikipedia.org/wiki/Counter-rotating_propellers

    Counter-rotating propellers generally turn clockwise on the left engine and counterclockwise on the right. The advantage of such designs is that counter-rotating propellers balance the effects of torque and P-factor , meaning that such aircraft do not have a critical engine in the case of engine failure.

  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. Propeller theory - Wikipedia

    en.wikipedia.org/wiki/Propeller_theory

    A propeller that turns clockwise to produce forward thrust, when viewed from aft, is called right-handed. One that turns anticlockwise is said to be left-handed. Larger vessels often have twin screws to reduce heeling torque , counter-rotating propellers , the starboard screw is usually right-handed and the port left-handed, this is called ...

  5. Critical engine - Wikipedia

    en.wikipedia.org/wiki/Critical_engine

    On propeller aircraft, there is a difference in the remaining yawing moments after failure of the left or the right (outboard) engine when all propellers rotate in the same direction due to the P-factor. On turbojet and turbofan twin-engine aircraft, there usually is no difference between the yawing moments after failure of a left or right ...

  6. P-factor - Wikipedia

    en.wikipedia.org/wiki/P-factor

    The clockwise-turning propeller is by far the most common. The yaw is noticeable when adding power, though it has additional causes including the spiral slipstream effect. In a fixed-wing aircraft, there is usually no way to adjust the angle of attack of the individual blades of the propellers, therefore the pilot must contend with P-factor and ...

  7. Contra-rotating - Wikipedia

    en.wikipedia.org/wiki/Contra-rotating

    A Soviet Ka-32 helicopter with coaxial contra-rotating rotors, in 1989. 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.

  8. GOP senator: Opponents of Prop. 1 are misrepresenting it ...

    www.aol.com/news/gop-senator-opponents-prop-1...

    “I have spoken with residents from states that use ranked-choice voting, and they are pleased with the system. It tends to moderate the extremes and bring more balanced representation.” | Opinion

  9. Propeller (aeronautics) - Wikipedia

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

    Counter-rotating propellers are sometimes used on twin-engine and multi-engine aircraft with wing-mounted engines. These propellers turn in opposite directions from their counterpart on the other wing to balance out the torque and p-factor effects. They are sometimes referred to as "handed" propellers since there are left hand and right hand ...