Kazan Helicopters Mi-17-1V Flight Manual page 62

MI1·17·1B. Flight manual
and feet removed from the pedals depression of the YAW ON (BKJl.
HAnPABJlEHlilE) switch-light should come on. As this takes place
pointer H of the indicator should be centered. Rotation of the YAW
(HAflPA8J1EHiIIE)
dial more than 1.5 turn to the left Or to the right
should cause a pedal movement in the same direction. With the
pedals set neutral, the pointer H of the indicator and the YAW
(HAnPABJlEHlilE) dial of the control panel should return to their ini-
tial positions.
(d) Depress the YAW OFF (OTKJl. HAnPABJlEHlilE) button at the con-
trol panel and observe the YAW ON (BKJl. HAnPABJlEHlilE)
switch-light to go out.
Caution. When testing the autopilot on the ground avoid the heli-
copter breakaway or turning for this purpose move the
pedals and control stick smoothly and not more than ±50
mm from the neutral position.
(6) Check the engines partial acceleration performance, i.e. from the idling
speed up to a gas generator speed 1 to 1.5% below the speed with the
throttle control twist grip in the right position. For this purpose:
(a) Smoothly rotate the throttle control twist grip to the right and note
the gas generator rotor speed. The power plant operation parame-
ters should correspond to the values of the Table 2.9.
(b) Smoothly set the engines to idle power and again set the throttle
control twist grip to the right position within a period of 1 to 2 s. In so
doing, measure the time elapsed since the beginning of turning the
throttle control twist grip to the right up to the moment when a
speed is 1 to 1.5% below that with the throttle control twist grip at
the right position. The TGT should not exceed the limits indicated
on the graph of Fig. 3.4.
The partial acceleration time should not exceed 3 to 6s.
(7) With throttle control twist grip turned to the right, test the serviceability of
the FT - 3P,Q-3BM EEC circuits:
- Set the FT 1 TEST- OPERAT - FT 2 TEST (KOHTPOJlb CTi -
PA60TA-KOHTPOJlb CT 2) selector switch to FT 1 TEST
(KOHTPOJlb CT1), the FREE· TURB OVERSP L ENG, FREE
TURB OVERSP R ENG annunciators should go on.
- Set the selector switch to OPERAT position; the annunciators should go
off.
- Set the FT 1 TEST- OPERAT - FT 2 TEST (KOHTPOJlb CTi -
PA60TA-KOHTPOJlb CT 2) selector switch to FT 2 TEST
(KOHTPOJlb CT 2), the FREE TURB OVERSP L ENG, FREE
TURB OVERSP R ENG annunciators should go on.
-SeHheselectorswitch to OPERAT position; the annunciators should
go off.
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