Hawker 850XP Pro Line 21 Airplane Flight Manual
Page 3
Sub-section - 5.10
OPERATING SPEEDS
FAA Approved
Original Issue: Feb 28, 2006
INTRODUCTION
This Sub-section provides the operating speeds relevant to the certified performance of the
airplane.
DEFINITIONS
V
MCG
The minimum control speed after an engine failure on the ground during a
continued takeoff with flaps 15
°
or 0
°
ranges from 87.5 KIAS to 113 KIAS,
depending on temperature, altitude and weight conditions. This speed has been
established without the assistance of nosewheel steering, the airplane having
been rotated at the normal V
R
.
V
MCA
The minimum control speed away from ground effect with flaps 15
°
is 108 KIAS
and with flaps 0
°
is 114 KIAS at Sea Level, ISA conditions.
V
MCL
The minimum control speed with flaps 45
°
, is 105 KIAS. The minimum control
speed with flaps 25
°
, is 106 KIAS.
V
REF
The landing reference speed. The speed at which the pilot should aim to cross
the runway threshold with flaps at 45
°
. V
REF
is shown in Figure 5.10.3
.
V
1
The take-off decision speed (power failure recognition speed). The scheduled
take-off decision speed is not less than V
MCG
or greater than V
R
in terms of
calibrated airspeed
.
V
R
Rotation speed is the speed at which the pilot should initiate a change in the
airplane attitude with the intention of leaving the ground. V
R
is determined at
low weights as 1.1 x minimum unstick speed.
For flaps up, V
R
is determined at higher weights by the need to achieve V
2
at 35
feet in the event of an engine failure. At high thrust conditions of low altitude and
low temperature the minimum V
R
requirements of minimum V
1
for flaps 15
°
or
1.05 V
MCA
for flaps 0
°
are critical.
V
2
The take-off safety speed. V
2
is equal to V
R
plus the increment in speed
attained prior to reaching 35 feet with an engine failure. For flaps up, V
2
is equal
to the speed necessary to achieve a second segment climb gradient of 2.4%, if
this is higher. At high thrust conditions, V
2
is related to V
MC
.
V
FTO
The final take-off climb speed V
FTO
is shown in Figure 5.10.1.
V
ERC
The en-route climb speed V
ERC
is shown in Figure 5.10.2.
V
S
Various scheduled speeds are based on the power off stalling speed (Defined
as the minimum speed in a stall). V
S
is shown in Figure 5.10.4 in terms of
Equivalent Air Speed (EAS).
NOTE: At higher altitudes and/or temperatures, the values of V
MCG
, V
MCA
and V
MCL
decrease.
For Training Purposes Only
