retreating blade

retreating blade
отступающая лопасть (несущего винта)

Englsh-Russian aviation and space dictionary. - M.: Military publishing house USSR Ministry of Defence. . 1974.

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  • retreating blade — The process of the rotor blade moving away from the relative airflow (i.e., in the direction opposite to which the helicopter is flying). See retreating blade stall …   Aviation dictionary

  • Retreating blade stall — is a hazardous flight condition in helicopters and other rotary wing aircraft, where the rotor blade rotating away from the direction of flight stalls. The stall is due to low relative airspeed and/or excessive angle of attack (or AOA).… …   Wikipedia

  • retreating-blade stall — The stall of a helicopter rotor disc that occurs starting at the tip of the retreating blade. This happens when the helicopter forward speed is high. The individual angle of attack of the retreating blade becomes larger because the downward blade …   Aviation dictionary

  • blade flapping — The vertical movement of a helicopter rotor blade about a horizontal or flapping hinge, in which the blades tend to rise and descend with respect to the rotor hub as they rotate. Blade flapping tends to minimize asymmetrical lift by increasing… …   Aviation dictionary

  • blade stall — As it refers to rotorcraft, it is the condition of the retreating rotor blade when in forward flight and when operating at an angle of attack greater than the maximum angle of lift. This occurs at high forward speeds and when settling with power …   Aviation dictionary

  • Dissymmetry of lift — in rotorcraft aerodynamics refers to an uneven amount of lift on opposite sides of the rotor disc. It is a phenomenon that affects single rotor helicopters in lateral flight, whether the direction of flight be forwards, sideways or in reverse.… …   Wikipedia

  • Helicopter — For other uses, see Helicopter (disambiguation). Helicopter An LAPD Bell 206 …   Wikipedia

  • helicopter — /hel i kop teuhr, hee li /, n. 1. any of a class of heavier than air craft that are lifted and sustained in the air horizontally by rotating wings or blades turning on vertical axes through power supplied by an engine. v.i. 2. to fly in a… …   Universalium

  • dissymmetry of rotor thrust — A condition in which one side of a rotor disc produces more thrust than the other. The speed of relative airflow over the advancing blade is higher than that of the retreating blade. The rotor thrust of the advancing blade also is higher than… …   Aviation dictionary

  • Coaxial rotors — Kamov Ka 32A 12 Coaxial rotors are a pair of helicopter rotors mounted one above the other on concentric shafts, with the same axis of rotation, but that turn in opposite directions (contra rotation). This configuration is a feature of… …   Wikipedia

  • Helicopter rotor — This article is about helicopter main rotor systems. For antitorque control, see tail rotor. Helicopter rotor The rotor head of a Sikorsky S 92 A helicopter main rotor or rotor system is a type of fan that is used to generate both the aerodynamic …   Wikipedia


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