DG Flugzeugbau DG 202, Руководство по эксплуатации самолета

Страница: 68 / 212

A A I I R R S S P P E E E E D D I I N N D D I I C C A A T T O O R R W W I I N N T T E E R R 7 7 F F M M S S 4 4 ( ( 3 3 0 0 0 0 K K M M / / H H ) )
Aplication
Developed especially for gliding, the instrument shows airspeed on a 510°
spiral scale. Gradations for low and average speeds are greatly enlarged, in
order to permit speeds in the ranges of primary interest to be read accurately
and with ease.
Technical data
Black plastic housing, white scale on matt black background see scale drawing
for installation dimensions, weight 0,205 kg 0 in 6 or 12 o’clock-position (only
mph or knots-readings) ranges: see table
Aplication
An alternative to the 6 FMS 4 airspeed indicator in small standard housing for
installation where space is at a premium.
Technical data
like 6 FMS 4
see scale drawing for installation dimensions
ranges: see table
weight 0,075 kg
Speeds frequently used in general aviation
V speeds are nearly always given as Indicated Airspeed
(IAS), so that pilots can read them directly off the airspeed
indicator (ASI). ASIs carry color-coded merkings that give
the pilot an immediate reference, as follows.
VNE Red line and top of yellow arc. The VNE, or the
never exceed speed, of an aircraft is the V speed which
refers to the velocity that should never be exceeded due
to risk of structural failure, most commonly due to wing or
tail deformation or failure and less commonly due to
aeroelastic flutter (usually in faster aircraft). VNE is specified as a red line on many airspeed indicatore. This
speed is specific to the aircraft model, and represents the edge of its performance envelope.
VA Top of green and bottom of yellow arcs . The yellow arc is caution, as speeds in this region may add
dangerous stress to the aircraft, and are only to be used in smooth air when no turbulence or abrupt control
inputs are expected. Design maneuvering speed (stalling speed at the maximum legal Gforce, and hence the
maximum speed at which abrupt, full deflection, control inputs will not cause the aircraft to exceed its G-force
limit). Maneuvering speed is limited by aircraft structural characteristics. With the Cirrus SR20 and SR22, this
speed is also known as V0.
VFE Top of white arc. Maximum flap extended speed (a different maximum speed may be specified for
partial flap extension).
VX Best angle of climb speed.
VS1 Bottom of green arc . The stalling speed or the maximum steady flight speed obtained in a specific
configuration (usually a configuration "clean" of flaps, landing gear and other sources of drag).
VS0 Bottom of white arc . Stall speed in landing configuration.