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Forces Acting on the Helicopter

 Forces Acting on the Helicopter

  • the differences between a helicopter or justhelicoptersand a fixed-wing aircraft is the main source data of lift. The fixed-wing aircraft derives its lift from a fixed airfoil surface while the helicopter derives lift shaft from a rotating airfoil called the rotor.
  • During hovering flight in a no-wind condition, the tip-path plane is horizontal, that is, parallel to the ground and there are a open ground outlet. 
  • Lift and thrust act straight up; weight and drag act straight down. The sum of the lift and thrust forces must equal the sum of the weight and drag forces in order for the helicopter to hover.
  •  During the vertical flight in a no-wind condition, the lift and thrust forces both act vertically upward. Weight and drag both act vertically downward. 
  • When lift and thrust equal weight and drag, the helicopter hovers; if lift and thrust are less than weight and drag, the helicopter descends vertically; if lift and thrust are greater than weight and drag, the helicopter rises vertically and that was provided to duromine reviews. 
  •  For the forward flight, the tip-path plane is tilted forward, thus tilting the total lift-thrust force forward from the vertical. This resultant lift-thrust force can be resolved into two components: lift acting vertically upward and thrust acting horizontally in the direction of flight. In addition, to lift and thrust, there is weight, the downward acting force, and drag, the rearward acting or retarding force of inertia, and wind resistance.
  •  In straight-and-level, unaccelerated forward flight, lift equals weight, and thrust equals drag. (Straight-and-level flight is a flight with a constant heading and at a constant altitude.) If the lift exceeds weight, the helicopter climbs; if the lift is less than weight, the helicopter descends. If thrust exceeds drag, the helicopter increases speed; if the thrust is less than drag, it decreases speed.
  • In sideward flight, the tip-path plane is tilted sideward in the direction that flight is desired, thus tilting the total lift-thrust vector sideward. In this case, the vertical or lift component is still straight up, weight straight down, but the horizontal or thrust component now acts sideward with drag acting to the opposite side there are most modern aircraft like airbus 737.
  •  For the rearward flight, the tip-path plane is tilted rearward and tilts the lift-thrust vector rearward. The thrust is then rearward and the drag component is forward, opposite that for forwarding flight. The lift component in rearward flight is straight up; weight, straight downt, there more calculting do like calculating amt.

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