HI.II.D.K1

From the FAA library

• Helicopter Flying Handbookp. 2-17
  Chapter 2: Aerodynamics of Flight › Forward Flight

  Decreasing the pitch causes the helicopter to descend. In a no-wind condition in which 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 ... Flight In steady forward flight, with no change in airspeed or vertical speed, the four forces of lift, thrust, drag, and weight must be in balance. Once the tip-path plane is tilted forward, the total lift-thrust force…

• Pilot's Handbook of Aeronautical Knowledgep. 5-2
  Chapter 5: Aerodynamics of Flight

  thereby cancel, the effects of each other. In Figure 5-1, the force vectors of thrust, drag, lift, and weight appear to be equal in value. The usual explanation states (without stipulating that thrust and drag do not equal weight ... lift) that thrust equals drag and lift equals weight. Although true, this statement can be misleading. It should be understood that in straight, level, unaccelerated flight, it is true that the opposing lift/weight forces are equal. They are also greater…

• Aviation Maintenance Technician Handbook - Airframep. 2-18
  Chapter 2: Aerodynamics, Aircraft Assembly, & Rigging › Forces Acting on the Helicopter

  drag, the helicopter rises vertically. For 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 ... thrust equals drag. (Straight-and-level flight is flight with a constant heading and at a constant altitude.) If lift exceeds weight, the helicopter climbs; if lift is less than weight, the helicopter descends. If thrust exceeds drag, the helicopter…

• Aviation Maintenance Technician Handbook - Airframep. 2-22
  Chapter 2: Aerodynamics, Aircraft Assembly, & Rigging › Helicopter Flight Conditions › Forward Flight

  ascends. Decreasing the pitch causes the helicopter to descend. In a no wind condition, when 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 ... Flight In steady forward flight with no change in airspeed or vertical speed, the four forces of lift, thrust, drag, and weight must be in balance. Once the tip-path plane is tilted forward, the total lift-thrust force…