How fast is a 747 going when it takes off?

What speed does a Boeing 747 take off at? A fully loaded Boeing 747 'Jumbo Jet' on a normal long haul flight would take off at a speed of around 160 knots which is 184 mph. The calculated take-off speeds vary depending on environmental conditions, runway length and weight.



People Also Ask

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). Light aircraft, such as a Cessna 150, take off at around 100 km/h (54 kn; 62 mph).

MORE DETAILS

The answer is around 500 mph in still air. Jets often cruise near their maximum speed; in those cases they cannot speed up without exceeding limitations. Exceeding a limitation is unsafe and is contrary to the regulations.

MORE DETAILS

Do commercial planes fly at maximum speed? Large commercial jets fly from 550 to 580 miles per hour, but their landing and take-off speeds vary. Most commercial jets fly from 160 to 180 miles per hour, with landing speeds ranging from 150 to 165 miles per hour.

MORE DETAILS

As the plane descends into ground effect, it may actually accelerate if the engines are producing enough thrust, since in ground effect the plane requires much less power to keep flying. Power from the engines will translate into speed, if not height.

MORE DETAILS

The 747's maximum takeoff weight ranges from 735,000 pounds (333 t) for the -100 to 970,000 pounds (440 t) for the -8. Its range has increased from 5,300 nautical miles (9,800 km; 6,100 mi) on the -100 to 8,000 nautical miles (15,000 km; 9,200 mi) on the -8I.

MORE DETAILS

A modern Boeing 747 can fly about 15,000 km (9,500 miles) when it's flying at 900 kmh (550 mph). This means it can fly non stop for almost 16 hours!

MORE DETAILS

The North American X-15 may be the fastest plane in the world, with speeds at 4,520 mph and Mach 5.93. It's an experimental aircraft used and powered by NASA and USAF.

MORE DETAILS

The reduced takeoff thrust procedure increases engine durability, lowers maintenance costs, and increases engine reliability. The airliners we have today are highly overpowered as they are designed to safely take off with one engine inoperative.

MORE DETAILS

In aviation, the rule of three or 3:1 rule of descent is a rule of thumb that 3 nautical miles (5.6 km) of travel should be allowed for every 1,000 feet (300 m) of descent. For example, a descent from flight level 350 would require approximately 35x3=105 nautical miles.

MORE DETAILS

Aircraft are put through extreme testing during their certification, but such limits are never intended to be actually faced. 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.

MORE DETAILS

Every aircraft will have a different ideal altitude where it operates at maximum efficiency. The optimal cruising altitude for a Boeing 747 is 35,105 feet. Each individual airplane will have a different “sweet spot” that translates to the most efficient ride for them.

MORE DETAILS

Aided by a more powerful jet stream than usual, this rapid journey saw the 747 reach a top speed of 825 mph. Popular Mechanics reports that it was so powerful on this occasion because of a 'bomb cyclone' near Greenland.

MORE DETAILS

TIL: A Boeing 747 can carry roughly 63,000 gallons of fuel.

MORE DETAILS

Can a wide body airliner land with a full fuel tank? Yes! But it is safer to land an aircraft below its published MLW.

MORE DETAILS

The middle seats are safer than the window or aisle seats, as you might expect, because of the buffer provided by having people on either side, professor Drury said to the Conversation. He noted that sitting next to an exit row can ensure a quick exit if there is an emergency, except in case if there is a fire.

MORE DETAILS

The higher a plane flies, the faster it can fly—to a point. “Less-dense air at higher altitudes means the actual speed the aircraft is traveling over the ground is much faster than the aircraft speed indicator shows the pilots in the cockpit,” says Kyrazis.

MORE DETAILS

“Making up lost time can be tough for pilots, as we can only theoretically fly at certain maximum speeds.” While the plane may be able to go slightly faster, additional fuel burn has to be taken into consideration—and in many cases, it's not worth it to the airline's bottom line.

MORE DETAILS

In jet aircraft, an overspeed results when the axial compressor exceeds its maximal operating rotational speed. This often leads to the mechanical failure of turbine blades, flameout and total destruction of the engine.

MORE DETAILS

This means pilots could opt to go above the speed to make up time, although this burns more fuel - not just costing more, but affecting the environment. So pilots will likely only do it if the costs mean they can avoid other expensive issues, such as missed flight connections.

MORE DETAILS

Technically this is the so-called 'stall speed', where air passes over the wings fast enough to sustain altitude, and for small planes this can be less than 50km/h (31mph). But at such low speeds, the aircraft is easily destabilised, and could fail to leave the runway.

MORE DETAILS