How many engines does the 747 need to fly?

How many engines does the 747 need to fly? To meet the power needs of an aircraft with the 747's weight and carrying capacity, four engines were required. They were also required for long over ocean flights, to insure that the aircraft could make landfall in the event of a loss of an engine...

How many engines are needed for a 747?

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.

What do pilots do if engines fail?

Airplanes are designed with sensors in the cockpit that notify the pilot when an engine fails. Once the sensor goes off, the pilot will begin to perform the steps for an emergency landing. Among other things, this means descending to a lower altitude and, potentially, reducing the airplane's speed.

Will Boeing ever build the 747 again?

No more 747s are being made, but Boeing notes that they're still taking flight. The 1970s version even inspired one man to build a ground-based replica. We are proud that this plane will continue to fly across the globe for years to come, Boeing's Smith said. Copyright 2023 NPR.

Can an A380 fly on 1 engine?

While it is possible for an A380 to operate on a single engine, it is not ideal as the aircraft would experience a decrease in speed, drag, and loss of altitude, making it crucial for the crew to restart the other engines or find a suitable airport for an emergency landing.

What happens if 2 engines fail on a plane?

If both engines fail, the aeroplane is no longer being pushed forwards through thrust, therefore in order to keep the air flowing over the wings, the aircraft must exchange energy through losing altitude (descending) in order to maintain forward airspeed.

Why does 747 have a hump?

Because of aerodynamics, the cockpit level had to rise and slope back down to the main fuselage, giving us the iconic hump.

How far can a 747 fly on a full tank of fuel?

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!

What is the germiest place on a plane?

According to flight attendant Brenda Orelus, the dirties place on an airplane is not the lavatory or the tray tables. It is the seat-back pockets. IN a video that Orelus posted on TikTok she revealed to her more than 100,000 followers that the pockets are full of germs and are almost never cleaned.

Why are 747 no longer used?

Built in 1967 to produce the mammoth jet, it remains the world's largest manufacturing plant according to Boeing. But after five decades, customer demand for the 747 eroded as Boeing and Airbus (AIR.PA) developed more fuel efficient two-engine widebody planes.

Why do airlines not like A380?

The arrival of the A380 in 2007 was poorly timed. The price of jet fuel had begun to creep up, and by 2007 was floating at around $4 a gallon. This made airlines shy away from the expensive to operate four engine jets of the 80s and 90s, and to look instead to fuel efficiency as a major deciding factor.

How far can a 747 fly without engines?

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).

What is the top speed of the 747?

The top speed of the Boeing 747 itself is about 570 mph, and this flight maxed out at 825 mph. The difference between “ground speed” (zero bonus) and “air speed” (200+ mph bonus) is also why this speed, while technically faster than the speed of sound, didn't ever go supersonic.

How long can a 747 fly without engines?

How long can a 747 fly without engines? 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).

Do pilots turn off engines during flight?

Passenger jet pilots do not shut down any of the aircraft's engines without a solid reason. They may be forced to do so in the event of failure or even a relatively minor technical malfunction to avoid further damage and larger problems.