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Thiết kế kỹ thuật máy bay chiến đấu Episode 1 Part 4

Tham khảo tài liệu 'thiết kế kỹ thuật máy bay chiến đấu episode 1 part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | VOCABULARY OF DESIGN 45 Flying controls handling and stability Control and stability are complementary. Control is needed to make an aircraft manoeuvrable. Stability is provided to make it behave during those moments when the control of the pilot is relaxed or diverted. However control power is needed to overcome stability the greater the inherent stability the more effort that is required. In the end the degree of control required becomes a measure of aircraft stability. Fig. 2.10 Control trail or float. a. negative tea ll b. Po6i ti vQ trail Handling is. another matter. An aeroplane may be stable and controllable but unpleasant to fly. Another may be sheer delight for the pilot even though stability may be almost non-existent. Assessment of handling and the associated terms is a disciplined way of attempting to describe subjective qualities like sweetness and liveliness in an objective way. Control and control circuit behaviour Aileron. A simple flap-like surface set at the outboard trailing edge of a wing to provide control in roll. Backlash. Free play in the cockpit control i.e. any motion of a control which does not immediately deflect a control surface. Breakout force. The force a pilot must apply to move a control from a given position. Such forces always involve circuit friction. Elevator. The pitching control usually a simple flap-like surface attached to the tailplane or to a canard foreplane. The monobloc elevator is the continental name used widely by the French for the all-moving stabilator which has no separate tailplane and elevator surfaces. Float or trail. See fig. 2.10 is the tendency of a control surface to move with changes in the relative wind - either with the wind or against it. Friction. Control friction resists the pilot s effort to move a cockpit control. Gearing. The relationship between control surface movement and the movement of the control in the cockpit. Horn. Control horn balances are fitted to aileron elevator and rudder surfaces .