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The speeds needed for takeoff are relative to the motion of the air (indicated airspeed). 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 range of 240–285 km/h (130–154 kn; 149–177 mph).
How Fast Does a 747 Go To Take Off? A typical takeoff speed for a Boeing 747 is around 160 knots (184 mph), depending on the jet's wing flap configuration, the number of passengers aboard, and the weight of their luggage, fuel load, current weather conditions, and other factors.
A Boeing 747-400 has a maximum takeoff mass of 396,890 kg (910,000 lb). It is powered by four Pratt & Whitney PW4062 turbofans that produce a maximum thrust of 275 kN each.
The chart notes that if a Boeing 747-400 had an operational landing weight of 475,000 lbs (215,456 kg) and wanted to land at a runway located at sea level, then the suggested runway length would be a little over 1,500 meters, or roughly 5,000 feet.
Can a 747 land on a 5000 foot runway? Yes, but only if it has an operation landing weight of no more than 475,000 pounds and the runway sits at sea level.
A retiring British Airways 747 may have cracked a record; the shortest ever jumbo flight. BA9172 left Cardiff Airport in Wales on Monday morning, and landed just over six kilometres later at an RAF airbase in St Athan. It took off at 11.09am and landed safely at 11.18am.
The Boeing 747 hit a maximum estimated ground speed of 825 mph.
Planes slowly angle up during take off at about 2-3 degrees per second for a Boeing 747. A bit of quick math and using the same Boeing 747 as an example, the average passenger plane has a maximum take off angle of about 10-15 degrees. That's well within the plane's tolerances of course.
"Most takeoffs use 'derated' thrust to save engine wear. For each takeoff, performance is calculated, the necessary power setting is determined, and the thrust setting is made. Usually, this is below the maximum available level, and is known as a derated thrust takeoff.
High-speed 747s
The 747-100, for instance, was tested up to Mach 0.99, almost breaking the sound barrier. Other 747s, such as Air Force One, have approached the sound barrier but never crossed it.
The stall speed is published as 138 Kts/160 mph, so roughly 20 above that to maintain level flight.
Slowest aircraft
The Ruppert Archaeopteryx has a certified stall speed of 30–39 kilometres per hour (19–24 mph). The Vought XF5U can fly as slow as 32 kilometres per hour (20 mph). The Tapanee Pegazair-100 stall speed is 45 kilometres per hour (28 mph).
The Boeing 777-200ER take off or rotate speed (VR) typically occurs between 130 – 160 knots (roughly 120-180 mph) depending on the weight of the aircraft. At a typical take-off weight of around 230,000 kgs, the take off speed would be approximately 145 kts which is approximately 165 mph.
The 747 goes from its approximate takeoff speed of 200 mph (89.4 meters per second) to 0 mph in 27 seconds. Using the definition of acceleration, this means the brake-only stopping 747 has acceleration magnitude of 3.31 m/s2.
The Boeing 747 is a large, wide-body (two-aisle) airliner with four wing-mounted engines. Its wings have a high sweep angle of 37.5° for a fast, efficient cruise speed of Mach 0.84 to 0.88, depending on the variant. The sweep also reduces the wingspan, allowing the 747 to use existing hangars.
The standard 747-400 Freighter can carry 248,000 lb (103,419 kg) of cargo approximately 4,450 nmi. With the 747-400ER Freighter, operators can fly an addi- tional 525 nmi or carry an additional 22,000 lb (9,979 kg) of payload.
Without engine thrust, the 747 had a glide ratio of 15:1, meaning it can glide forward 15 kilometres for every kilometre it drops. After calculating the glide ratio, the crew realized that they had less than 30 minutes to regain power before they smashed into the ground.
At cruising altitude, most commercial airplanes fly at a speed of roughly 500 to 600 mph. When landing, however, they must reduce their speed. A typical 747, for instance, has a landing speed of about 160 to 170 mph. And upon touching the runway, airplanes must quickly brake until they come to a complete stop.
For example, with a glide ratio of 15:1, a Boeing 747-200 can glide for 150 kilometres (93 mi; 81 nmi) from a cruising altitude of 10,000 metres (33,000 ft).
The approx. 10,700 feet Wikipedia figure is for a fully loaded 747 at sea-level. The lighter the plane, the less runway it needs. The 7,500-foot runway at TNCM allows a takeoff at 84% of the maximum takeoff weight.
Find out more about the museum here. Undefeated record: The world record for the world's longest continuous flight was set in 1959 by Robert Timm (pictured) and his co-pilot John Cook. Months in the air: The men flew in this four-seater aircraft for 64 days, 22 hours and 19 minutes.
The current longest flight in the world
Its longest flight path, which connects Singapore's Changi Airport with New York's John F. Kennedy International Airport, 9,585 miles away, takes 18 hours and 40 minutes. The carrier has been flying the route since 2021.
Different airplanes have different maximum altitudes, depending on their construction. For example, the Airbus A320 has a maximum altitude of 39,000 feet (11,900m) and the Boeing 747 45,000 feet (13,700m).
The Boeing 747 is considered to have the longest takeoff distance of the more common aircraft types and has set the standard for runway lengths of larger international airports. At sea level, 3,200 m (10,500 ft) can be considered an adequate length to land virtually any aircraft.