Comet 4 Checklists
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Speeds | Checklists | Limits
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

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