Kazan Helicopters Mi-17-1V Flight Manual page 100

M,,·17·1B. Flight manual
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Fig. 4.5 Course Indicator Display 30° Short of Landing
at Correct Execution of Turn
After recovery from the final turn proceed to descent at a rate of 2 to 3
mlsec and reduce airspeed so as it equals 100 to 140 kmlh when passing
over the locator middle marker at a height of 100 m. If the helicopter has
descended to a height of 100 m before passing over the LMM, proceed to
horizontal flight.
(4) If recovery from the turn to the LMM yields a heading differing from the
landing heading, correct the error in the course of descent .for this pur-
pose note the difference between the actual magnetic heading and the
landing heading at RB
=
O. If the difference exceeds 5° correct the final
heading error in descent by turning toward the ADF pointer (from the
heading selector pointer) so as the ADF pointer set midway between the
index and the heading selector pointer. If the course indicator
(nHn)
reads a magnetic heading exceeding the landing heading, execute cor-
rective turn. to the right, if otherwise execute corrective turn to the left.
Having completed the corrective turn, maintain the corrected magnetic
heading until the ADF pointer matches with the heading selector pointer
and thereafter turn the helicopter so as to align the ADF pointer and the
heading selector pointer under the index (at no drift on the landing head-
ing) or aside of it through a drift angle. At RH drift maintain the heading
selector pointer set to the landing magnetic heading and the ADF pointer
aligned to each other and deflected to the right from the upper stationary
index through the drift angle.
(5) After passing over the LMM keep on the selected landing heading.
In day time, after breaking through clouds visually refine the helicopter
landing attitude- heading and position by referring to the land marks and
airfield marks. In night time, determine the moment of recovery from
clouds after passing over the LMM only by the appearance of the airfield
lights.
(6) If the wide rectangular approach pattern procedure is choosen for ap-
proach, upon returning from mission and passing over the LMM assume
the landing heading and, upon expiration of an estimated time (2 min for
no-wind conditions), turn to crosswind leg and fly wide approach pattern.
Use the wide approach pattern procedure in conditions when the LMM is
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