Speeds
|
Weight kg
(lb)
x1000
|
|
Vat
|
|
132
|
145
|
143
|
|
130
|
142
|
142
|
|
128
|
140
|
140
|
|
127
|
139
|
139
|
|
126
|
138
|
138
|
|
124
|
136
|
136
|
|
123
|
134
|
135
|
|
121
|
132
|
133
|
|
119
|
130
|
131
|
|
117
|
128
|
130
|
|
114
|
126
|
128
|
|
112
|
123
|
126
|
|
111
|
122
|
125
|
|
110
|
121
|
124
|
|
108
|
119
|
122
|
|
106
|
117
|
120
|
|
106
|
117
|
118
|
|
106
|
117
|
116
|
|
106
|
117
|
114
|
|
-
|
-
|
112
|
|
.
.
|
MTOW 4C
|
MTOW
4B
|
|
MTOW
4
|
|
|
|
|
|
|
|
|
Max
Land
|
|
|
|
|
|
|
|
|
Vat : Add 1/3 of windspeed when windspeed
greater than 15 kts. The total increment
added must not exceed 15 kts.
Flaps up : 160-170 kts
20 degrees is the only flap setting to be used for takeoff.
|
Speed Limits
|
Airspeed IAS (VMO):
|
330 kts (342 kts Comet 4B)
|
Mach number (MMO):
|
0.8
|
Max IAS
for lowering or raising landing gear:
|
254 kts
|
Max IAS
with landing gear down:
|
VMO
|
Max IAS
with flaps
20 deg:
30 deg:
40 deg:
60 deg
|
220 kts
200 kts
180 kts
160 kts
|
Max
altitude for flap extension:
|
20,000 ft except in emergency
|
Max crosswind component
Takeoff:
Landing:
|
28 kts
28 kts
|
Max for emergency
descent:
|
MMO/VMO
|
Turbulence speeds
Climb, cruise & descent:
|
260 kts to 30,000 ft, Mach 0.7
above this
|
Max IAS
for screen wipers:
|
250 kts
|
Max
speed for air brakes:
|
No limit.
|
|
Altitude
Limits
|
Max operating altitude:
|
40,000 ft (32,000 ft Comet 4B)
|
Max
altitude for flap extension:
|
20,000 ft except in emergency
|
|
Weight Limits
|
Max takeoff
|
Comet 4:
|
|
|
Comet 4B:
|
|
Comet 4C:
|
|
|
68,946 kg
(152,000 lb)
|
71,668 kg
(158,000 lb)
|
73,482 kg
(162,000 lb)
|
|
Max landing:
|
54,431 kg
(120,000 lb)
|
Empty
|
Comet 4:
|
|
Comet 4B:
|
|
Comet 4C:
|
|
34,212 kg
(75,424 lb)
|
35,545 kg
(78,363 lb)
|
35,995 kg
(79,355 lb)
|
|
Max fuel
|
Comet 4:
|
|
Comet 4B:
|
|
Comet 4C:
|
|
32,477 kg
(71,600 lb)
|
28,576 kg
(63,000 lb)
|
32,477 kg
(71,600 lb)
|
|
Max payload
|
Comet 4:
|
|
Comet 4B:
|
|
Comet 4C:
|
|
9,203 kg
(20,290 lb)
|
10,948 kg
(24,137 lb)
|
11,162 kg
(24,610 lb)
|
|
|
Range Limits
|
Max
payload
|
Comet
4:
|
|
Comet
4B:
|
|
Comet
4C:
|
|
2,800 nm
|
2,260 nm
|
2,450 nm
|
|
Range figures are in still air, using long range cruise techniques & no fuel
reserves
|
DH106 Comet 1 Pilot's Notes
Limitations:
Never exceed 300 KIAS or Mach 0.77.
Takeoff:
1 stage of flaps (15 degrees)
Elevator trim: Neutral to 1 degree up.
Hold the brakes, and let the engines spool up to 10250 rpm.
Rotate gently at 120 KIAS, the aircraft takes off at
120-130 KIAS depending
on weight.
Initial climb:
Retract landing gear below 150 kts
Reduce throttle to 9750 RPM.
Retract flaps at 160 kts IAS.
Let the aircraft accelerate to 230 kts IAS and climb
at this speed.
En route climb:
Increase throttle from time to time to hold the engines at 9750 RPM,
until you are
using
full throttle.
Keep the airspeed at 230-260 KIAS (or Mach=0.6 above 30000 ft) by adjusting
the climb rate.
Cruise:
Normal, fast cruise: Mach 0.72. Expect 9500 rpm.
Economical cruise: Mach 0.70.
Cruising altitudes:
High weight: 27000 - 28000
ft.
Medium weight: 30000-34000
ft.
Light weight: 36000-40000
ft.
Descent:
Descend rate -1500 fpm.
Airspeed 220 KIAS
Descend rates up to -2500 fpm are possible if the airbrakes (spoilers) are
used.
The airbrakes were not used under normal conditions.
Holding:
Airspeed 185 KIAS.
Approach and landing:
Reduce speed to 150 kts. Flaps stage 2.
Entering glideslope: Extend landing gear, reduce
to135 kts, flaps stage 3
1700 ft above runway: Reduce to 120 kts, flaps stage
4
800 ft above runway: Flaps stage 5 (full flaps).
Final approach at 110 kts, touchdown at 90 kts
Notes:
1) The airbrakes (spoilers) are not used for landing.
2) The aircraft lands in a nose-up attitude. This is authentic, and you must
push
the stick forward to bring the nose down.