Speeds

Weight kg  (lb)
x1000

20 deg

Vr

V2

Vat

73.5

(162)

132

145

143

71.5

(158)

130

142

142

70

(154)

128

140

140

69

(152)

127

139

139

68

(150)

126

138

138

66

(146)

124

136

136

64.5

(142)

123

134

135

62.5

(138)

121

132

133

61

(134)

119

130

131

59

(130)

117

128

130

57

(126)

114

126

128

55.5

(122)

112

123

126

54.5

(120)

111

122

125

53.5

(118)

110

121

124

52

(114)

108

119

122

50

(110)

106

117

120

48

(106)

106

117

118

46

(102)

106

117

116

44.5

(98)

106

117

114

42.5

(94)

-

-

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.