Chandelle - Kazan Helicopters Mi-17-1V Flight Manual

M,,·17·1B. Flight manual
the direction of zoom.
(b) Establish a selected speed end respective engine power.
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(2) Enter zoom from horizontal flight by pulling the control stick back at
speeds not exceeding the maximum limits indicated in Table 2.8.
The recommended zoom entry speed is not less than 150 km/h.
The rate and travel of the control stick backward motion should be such
as the helicopter pitch angle changes by 20° within a period of time not
less than 6 to 7s. Maintain the main rotor collective pitch constant auring
entry and recovery from zoom.
(3) Upon reaching a selected pitch-up angle fix this angle by slightly pushing
the control stick forward. Counteract the helicopter tendency to decrease
the pitch-up angle with the speed decreasing in the straight segment of
the zoom path by timely and appropriate application of the control stick
backward.
(4) Monitor the pitch-up angle in zoom, freedom from bank, skidding and
slipping by reading the Ar6 gyro horizon.
(5) Initiate recovery from zoom upon attainment of a speed of 110 to 100
km/h by pushing the control stick forward at a rate ensuring establish-
ment of horizontal flight within a period of time not less than
5
to 6s,
avoiding deceleration below the minimum speed level established for a
given altitude.
(6) After recovery from zoom to horizontal flight set the engine power re-
quired for the next regime of flight or manoeuvre.
(7) The average values of climb and time of zoom execution for initiation alti-
tudes up to 1000 m and initiation speeds of 180 to 200 km/h with a re-
spective change in the pitch-Up angles are indicated in Table 4.6.
Table 4 6
Climb in zoom, m Zoom execution time, s
Pitch-up angle, deg
Initial speed Initial speed Initial speed Initial speed
of 180 km/h of 200 km/h of 180 km/h of 200 km/h
10
130 200 22 30
20
100 150 14 17
4.25.4 Chandelle
(1) The chandelle is used for rapid 180° (90°) turn after climbing in zoom.
The procedure of execution of the first half of chandelle does not differ
from that of zoom.
The recommended zoom entering speed is within the limits of 180 to 220
km/h provided it does not exceed values indicated in Table 2.1.
Execute a chandelle with the main rotor collective pitch constant.
(2) On reaching a speed of 120 km/h in zoom apply the control stick and
pedals towards the direction of turn to make a turn with a bank angle up
to 30° (the steeper is zoom, the higher should be the angle of bank in
turn).
(3) On reaching a selected bank angle push smoothly the control stick for
ward to reduce the helicopter pitch angle to maintain the co-ordinated
turn condition and avoid speed decrease below 70 km/h.
(4) In execution of a left chandelle the helicopter demonstrates a tendency to
increase roll, in execution of a right chandelle the helicopter demon-
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