Shifts And Hops At Low Altitude - Kazan Helicopters Mi-17-1V Flight Manual

M~·17
-1B. Flight manual
drop to 92 to 94% (with the collective pitch control lever being pulled up)
and by attainment of the gas generator rotors speeds corresponding to
takeoff power
forthe given
ambient
temperature.
Increasing of the main rotor collective pitch at a rate which yields setting
of takeoff power in a period of less than 5 s or an attempt to increase it
after the takeoff power is set may cause overloading of the main rotor, its
speed dropping below 88% and settling of the helicopter down to landing.
(4) At lift-off the helicopter shows a tendency to shift forward and to the left
which should be counteracted by appropriate applications of the flight
controls, and small forces appearing at the controls therewith are re-
moved by depression of the 3MT-2 trim actuator button.
(5) It is allowed to turn the helicopter in hovering at angular rates not exceed-
ing 12 deg/s.
When reversing a turn avoid full reversal of the pedals within a period
less than 3 s.
(6) It is allowed to execute 360 0 turns during hovering near the ground at
wind speed not exceeding 10
m/s.
At a wind speed exceeding 10
mls
hover the helicopter headed into the wind.
(7) The altitudes allowed for helicopter hovering are indicated in Table 2.2,
versus gross weights. It is allowed to hover al altitudes exceeding those
indicated in Table 2.2 during transportation of external loads and by tacti-
cal considerations.
Notes: 1. Abstain from hovering within the range of altitudes differing
from those indicated in Table 2.2 up to an altitude of 110m
except for urgent necessity since within this altitude range
a
complete safety of landing in case of failure of one engine (or
both) due to possible loss of the main rotor speed can not be
ensured.
2. At small shifts and unstable hovering the 270-L1TER FUEL
RSV (OCTAnOCb 270 n) annunciator may blink and voice
message EMERGENCY FUEL RESERVE is issued by the
PIi1-65 voice warning system.
(8) Listed below are approximate limit travels of the control stick from ,the
neutral position in hovering:
(a)
1/4 full travel back at aft CG limit and normal CG positions, and 1/2
full travel back at forward CG limit.
(b) 1/4 full travel to the right disregarding the CG position.
4.3. Shifts and hops at low altitude
(1) It is allowed to perform shifts and hops at low height for the training pur-
poses, for special operations and in cases when the field surface condi-
tion does not allow taxiing.
(2) Execute forward hops and shifts at a height up to 10m at a speed not
exceeding 20 km/h. In so doing, refer to the ground and use the lJ,Ii1CC-
15 Doppler system, with respect to the wind direction and speed near the
ground. At a wind speed above 10
mls
execute hops only with the heli-
copter headed into the wind.
(3) Execute sideward and backward shifts at a speed not exceeding 10 km/h.
In so doing, refer to the ground and previously make sure that the antici-
pated course is free from obstacles.
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