Flight manual DG-800B
2.2
Airspeed
Airspeed limitations and their operational significance are shown below:
Speed
(IAS)
km/h(kts)
Remarks
VNE
Never exceed
speed
Powerplant
extended
270
(146)
190
(103)
Do not exceed this speed in any
operation and do not use more
than 1/3 of control deflection.
Do not exceed this speed with the
powerplant extended (engine
idling)
VRA
Rough air speed
190
(103)
Do not exceed this speed except
in smooth air and then only with
caution. rough air is in lee-wave
rotor, thunderclouds etc.
VA
Manoeuvring
speed
190
(103)
Do not make full or abrupt
control movement above this
speed, because under certain
condition the sailplane may be
overstressed by full control
movement.
VFE
Maximum Flap
Extended speed
L
+ 8°, +5°
150
( 81)
190
(103)
Do not exceed these speeds with
the given flap settings
VW
Maximum winch
launching speed
150
( 81)
Do not exceed this speed during
winch- or auto-tow-launching
VT
Maximum aero-
towing speed
190
(103)
Do not exceed this speed during
aerotowing
VLO
Maximum
landing gear
operating speed
190
(103)
Do not extend or retract the
landing gear above this spee
VPO
Max. speed to
xtend and re-tract
the power-plant
100
( 54)
Do not extend or retract the
powerplant above this
speed
Warning: At higher altitudes the true airspeed is higher than the indicated
airspeed, so VNE is reduced with altitude see sect. 4.5.9.
Issued: November 1997
App. 2.3
Flight manual DG-800B
2.3
Airspeed Indicator Markings
Airspeed indicator markings and their color code significance are shown
below:
Marking
(IAS) value or
range
km/h
(kts)
Significance
White Arc
88 -190
(47.5 - 103)
Positive Flap Operating
Range
(lower limit is maximum weight
1.1 VSO in landing configuration.
Upper limit is maximum speed
permissible with flaps extended
po 8°, + 5°)
Green Arc
97 - 190
(52 - 103)
Normal Operating Range
(Lower limit is maximum weight
1.1 VS1 at most forward c.g. with
flaps neutral. Upper limit is rough
air speed.)
Yellow Arc
190 - 270
(103 - 146)
Manoeuvres must be conducted
with caution and only in smooth
air.
Red Line
270
(146)
Maximum speed for all
operations.
L
150
( 81)
Max. speed for landing
configuration L
Blue line
90
( 49)
Speed of best climb Vy
Yellow
Triangle
105
(57)
Approach speed at maximum
weight without water ballast
Issued: November 1997
App. 2.4