Peculiarities Of Takeoff And Landing Procedures On High.level Fie!Ds - Kazan Helicopters Mi-17-1V Flight Manual

MI1·17·1B. Flight manual
tain summits, mountain rivers and populated areas for visual orientation.
In enroute flying select reference objects on the open site of mountain
slopes.
(14) In transportation of external loads adhere to the instructions covered in
Section 5.
When flying in mountains in turbulent air the external load stability dete-
riorates and its swinging appears. Eliminate swinging by smooth reduc-
tion of airspeed.
4.22.1.Peculiarities of Takeoff and Landing Procedures on High-Level Fields
(1) The minimum dimensions of a field suitable for vertical takeoff and land-
ing in ground effect, with no obstacles In the clearway should be 50x50 m
and as listed below with obstacles up to 15m high at the field boundaries:
50x120 m at altitudes up to 1500 m.
50x165 m at an- altitude of 2000 m.
50x255 m at an altitude of 3000 m.
50x300 m at an altitude of 3500 m.
50x345 m at an altitude of 4000 m.
The minimum dimensions of a field for running takeoff and landing should
be as follows below:
50x200 m at altitudes up to 1500 m.
50x225 m at an altitude of 2000 m.
50x350 m at an altitude of 3000 m.
50x410 m at an altitude of 3500 m.
50x475 m at an altitude of 4000 m.
The minimum dimensions of a field for running landing with one engine
inoperative at altitudes up to 1500 m should be 50x190 m.
(2) Use vertical takeoff with acceleration out of ground effect in cases where
the field is of limited dimensions and surrounded with obstacles, and the
engine power available does not allow hovering out of ground effect.
Use vertical landing with hovering out of ground effect for landing on a
field of limited dimensions at helicopter gross weight allowing hovering
out of ground effect.
(3) Use vertical takeoff with acceleration in ground effect In cases where the
engine power available allows hovering at a height not less than 3 m and
the field dimensions allow acceleration In ground effect.
Use vertical landing with hovering In ground effect in cases where the
field dimensions and clearways, as well as the engine power available al-
low deceleration and hovering in ground effect.
(4) Use running takeoff in cases where the engine power available is ade-
quate for hovering at a height not less than 1 m, and the field surface
properties allow safe takeoff run of the helicopter over a distance of 80 to
100 m and subsequent acceleration in ground effect.
Use running landing in cases where the field surface condition and di-
mensions allow usage of this procedure.
The fields to be used for flights involving running takeoffs and landings
should be prepared and inspected in advance.
(5) Execute vertical takeoffs and landings with hovering in and out of ground
effect, as well as running takeoffs and landings Including landings with
one engine inoperative following the respective procedures covered In
Section 4.
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