IL.II.D.K2

From the FAA library

• 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…

• Pilot's Handbook of Aeronautical Knowledgep. 5-51
  Chapter 6: Flight Controls

  Chapter Summary In order to sustain an aircraft in flight, a pilot must understand how thrust, drag, lift, and weight act on the aircraft. By understanding the aerodynamics of flight, how design, weight, load factors, and gravity affect an aircraft…

• Pilot's Handbook of Aeronautical Knowledgep. 11-5
  Chapter 11: Aircraft Performance › Performance › Straight-and-Level Flight

  weight and a powerplant thrust equal to the aircraft drag. Thus, the aircraft drag defines the thrust required to maintain steady, level flight. As presented in Chapter 4, Aerodynamics of Flight, all parts of an aircraft contribute to the drag ... unaccelerated condition of flight is achieved with the aircraft trimmed for lift equal to weight and the powerplant set for a thrust to equal the aircraft drag. The maximum level flight speed for the aircraft is obtained when the power…

• 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…

• 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…