Landing; Vertical Landing With Hovering In Ground Effect; Vertical Landing With Hovering Out Of Ground Effect - Kazan Helicopters Mi-17-1V Flight Manual

MI1·17·1B. Flight manual
4.10. Landing
(1) The following landing procedures are authorized for the helicopter:
(a) Vertical landing
with
hovering Inground eifect.
(b) Vertical landing with hovering out of ground effect.
(c) Power-on running landing.
(d) Landing with one engine inoperative.
(e) Power-off autorotalion landing (only in emergency conditions).
(2) Execute all landings with the helicopter headed into the wind, as possible.
Before landing with a forward speed, including autorotation landing, dis-
engage the autopilot direction and altitude control channels.
Before proceeding to landing check the tail rotor pitch limit system by ob-
serving the null indicator on the tail rotor pitch limit system control panel.
The movable pointer should be to the left from the neutral index (the
higher are the altitude and the outside air temperature the closer is the
movable index to the left-most position).
4.10.1. Vertical Landing with Hovering in Ground Effect
(1) Before landing glide at 120 km/h lAS from the height of 100 m smoothly
pull in the control stick to initiate reduction of forward speed so as to bring
the speed to 60 to 50 km/h at a height of 60 to 50 m.
At a height of 8 to 5 m smoothly pull back the control stick and increase the
collective pitch as required to establish hovering at a height of 2 to 3m.
In the course of deceleration and transition to hoverina relieve the con-
trols forces by momentary depressions of the trimming button.
Caution: Initiate increase of engine power for the purpose of the heli-
copter deceleration in advance. Pull up the collective pitch
control lever smoothly to maintain the main rotor speed within
the specified limits. Any lag in timely increase of power and
sharp increase of power immediately before hovering may re-
sult in excessively high pitches to the main rotor and rough
landing.
(2) After hovering smoothly reduce the collective pitch to execute vertical
de~
scent with gradual reduction of vertical speed of descent so as to bring it
to a level not exceeding 0.2 m/s by the moment of touchdown.
Avoid lateral shifts of the helicopter before touchdown. Reduce the main
rotor collective pitch down to the minimum limit only being completely
sure that the helicopter wheels are positively supported by hard surface.
(3) In crosswind landing hold the helicopter by application of the control stick
into the wind until the helicopter is sure to land and stands firmly on the
ground.
4.10.2. Vertical Landing with Hovering out of Ground Effect
(1) Execute vertical landing with hovering out of ground effect in cases when
obstacles at the airfield clearways do not allow hovering near the ground.
Procedure of landing with hovering out of ground effect does not differ
from that when hovering in ground effect.
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