22. Auto-Rotation Landing
1 Welcome aboard, trainee.
2 Today we will learn how to descend to perform an autorotation landing.
3 Descending in this maneuver is performed when engines are not supplying any power.
4 The lowest vertical velocity would be when horizontal velocity is 130 km/h.
5 Be advised that when rotor pitch is low and rotor RPM is high, the helicopter is very hard to control. Therefore, reducing horizontal velocity below 100 km/h is not recommended. Reduced control using the rudder can be partially compensated for with corresponding cyclic control.
6 To perform an autorotation descent you need to establish a constant horizontal velocity while balancing the helicopter and trim the controls; reduce rotor pitch to minimum while avoiding excessive rotor RPM.
7 Move the throttle levers to the idle position (press [PageDOWN] twice if in AUTO mode) and adjust rotor RPM using the collective. The RPM should be maintained between 86-90%. When turning horizontally, ensure that helicopter does not bank more than 30 degrees.
8 Move throttle levers to the AUTO position (press [PageUP] twice from IDLE mode) and start reducing vertical speed while keeping rotor RPM within 86-90%.
9 This marks the end of this lesson.
10 You can now take control by pressing "ESC" and perform this descend yourself.
1 Welcome aboard, trainee.
2 Today, we will learn how to land helicopter in autorotation mode.
3 Landing in this mode on a runway is performed using a rolling type landing. This type of landing is preferred as it allows better control of the helicopter.
4 To perform an autorotation, you will need to do the following: establish constant horizontal velocity, and balance the helicopter and trim the controls; reduce rotor pitch to minimum while avoiding excessive rotor RPM; move the throttle levers to the idle position (press [PageDOWN] twice if in AUTO mode), while adjusting rotor RPM using the collective. RPM should be maintained at 90% and when turning horizontally, ensure that helicopter does not bank more than 30 degrees.
5 To land the helicopter you need to ensure that horizontal velocity is 120 km/h when reaching the leveling altitude; when at an altitude of 50 m, level the helicopter by pulling the cyclic back while gently increasing rotor pitch. Your goal is to achieve a gradual decent to 1 m and then pitch appropriately for landing.
6 When leveling, maintain helicopter pitch along helicopter's velocity vector; increase rotor pitch to maximum, and then gently land the helicopter on main gears while avoiding any abrupt nose gear touchdown. Horizontal velocity should be within 40-60 km/h.
7 After nose gear touch-down, release the cyclic and reduce rotor pitch to minimum. Use the wheel brakes to slow the helicopter.
8 Be careful not to touch-down when the horizontal velocity is above 80 km/h to avoid any "shimmy" oscillation effect.
9 This concludes this lesson.
10 You may now take control by pressing the "ESC" key. Good luck!