VAC — Missed-approach climb speed for flap configuration with critical engine inop (2.1 percent climb gradient). VAP — Approach target speed. VREF plus configuration (flaps/slats setting) and wind factor. Typically add (to VREF) half the headwind component plus all the gust factor (to a max of

**20 knots**).Regarding this, what is the speed for takeoff?

A headwind will reduce the ground speed needed for takeoff, as there is a greater flow of air over the wings. Typical takeoff air speeds for jetliners are in the 130–155 knot range (150–

**180 mph**, 240–**285 km/h**). Light aircraft, such as a Cessna 150, take off at**around 55 knots**(**63 mph**, 100 km/h).What is the v1 speed for a 747?

Aircraft | Takeoff Weight | Takeoff Speed |
---|---|---|

Boeing 757 | 240,000 lb 108,860 kg | 160 mph 260 km/h 140 kts |

Airbus A320 | 155,000 lb 70,305 kg | 170 mph 275 km/h 150 kts |

Airbus A340 | 571,000 lb 259,000 kg | 180 mph 290 km/h 155 kts |

Boeing 747 | 800,000 lb 362,870 kg | 180 mph 290 km/h 155 kts |