4.6.6 Landing gear operation
A pressure switch in landing gear system prevents retraction below
100 km/h (55 KIAS). It is recommended to keep airplane in a
shallow climb after take-off and wait until speed passes 120km/h
(65 KIAS).
It is recommended to visually check, if retracting procedure starts
(lights flash), or if landing gear is fully retracted (3 red lights
illuminate continuously). Test flight with opened landing gears with
installed doors was made up to 230 km/h (124 KIAS), without any
damage.
4.6.7 Flutter versus altitude
Fast airplanes are more susceptible to flutter. Problems may occur
during higher speeds at high altitudes because critical flutter speed
decreases with altitude.
V
NE
is limited for this reason according to following table to keep
TAS speed constant for altitudes above 3000 ft.
IAS V
NE
versus altitude:
For high altitude flights, keep maximum allowed IAS in this table, or check
TAS displayed on modern EFIS devices.
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