- Is a 4 engine plane safer than 2?
- Why are jet engines so loud?
- Which is bigger a 747 or 777?
- Why are planes so noisy?
- How can I make my jet engine quieter?
- Is 777 a jumbo jet?
- Are planes louder taking off or landing?
- Which part of the plane is the loudest?
- Why are 777 engines so big?
- Is Boeing 777 bigger than Airbus a380?
- Are aircraft getting quieter?
- How can I make my engine quieter?
- Can you hear a plane at 30 000 feet?
- How can I make my small engine quieter?
- Can a Boeing 777 fly on one engine?
- What is the oldest plane still flying?
- Can a 777 land itself?
- How long can a Boeing 777 fly?
Is a 4 engine plane safer than 2?
Q: Is a four-engine 747 safer than a two-engine 777.
A: No, they are both safe.
Having two additional engines is not a guarantee of increased safety.
The engine failure rate of the B747 is higher, due to having two more engines and the older technology..
Why are jet engines so loud?
The noise from a jet comes from two sources – the engine itself and the reaction the exhaust has with the surrounding air. … The more energy needed to ignite the air-gas mixture and expel it from the engine, the louder the engine will be. In layman’s terms, the louder the jet the less efficient it is.
Which is bigger a 747 or 777?
(With similar layouts, the 747 would have space for about 405 seats.) Both jumbo jets are significantly larger than the Boeing 777-300ER, the next-largest plane in production. (Boeing puts its capacity in a three-class configuration at 386 seats.)
Why are planes so noisy?
If we’re talking basic physics, the noise from a plane is caused by two things: by air going over its fuselage and wings (or ‘airframe’) and by the engines. Engine noise is created by the sound from the moving parts of the engine, and also by the air being expelled at high speed once it has passed through the engine.
How can I make my jet engine quieter?
Quieter engines Better engines for larger aircraft are coming too, based on the same turbofan technology. Using a gearbox to uncouple the fan and the low pressure turbine will improve performance and reduce noise.
Is 777 a jumbo jet?
The Boeing 777 is a wide-body airliner developed and manufactured by Boeing Commercial Airplanes. It is the world’s largest twinjet and commonly referred to as the Triple Seven. The 777 was designed to bridge the gap between Boeing’s 767 and 747, and to replace older DC-10s or L-1011s.
Are planes louder taking off or landing?
In takeoff, the engines produce more thrust, so they noise slightly more, but in other view, the wing is more “aerodynamic” due the flaps and slats are usually in “half” position. In landing, the engines almost idle, but the flaps and slats are in their maximum position, and they noise more.
Which part of the plane is the loudest?
Various studies cited in the studies indicate that sitting in front the wings and engines is the quietest place in flight, with behind the wing and engines being the loudest.
Why are 777 engines so big?
The reason why: the new engines offer far greater fuel efficiency and much less noise thanks to composite 3D printed materials and larger fan blades. By reducing weight with previously unattainable materials, the engines are able to draw more air, which greatly improves the efficiency and noise part.
Is Boeing 777 bigger than Airbus a380?
The A380 has 76 lie-flat seats with 48 inches of legroom in seat mode and is 18.5 inches wide (0.5 inches wider than economy). … The Boeing 777, on the other hand, has 60 inches of pitch in seat mode (and angled-flat mode) and is 20.5 inches wide.
Are aircraft getting quieter?
Beginning January 1, 2018, the FAA regulation will ensure that new subsonic jets and large airplanes will operate at least seven decibels quieter than the airplanes that are currently flying over U.S. skies.
How can I make my engine quieter?
Most engines get quieter when they use synthetic oil than when they use mineral oil. If the oil is okay, check whether the engine parts are worn out since they tend to produce noise. If they are worn out, consider taking your car to an experienced mechanic to replace the worn-out parts.
Can you hear a plane at 30 000 feet?
The softest sound an average human ear can detect is BY DEFINITION zero decibels. … Double that distance, and deduct 6; that would be 94 decibels at 2000 feet, 88 decibels at 4000 feet, 82 decibels at 8000 feet, 76 decibels at 16,000 feet, and 70 decibels from a jet flying overhead at 32,000 feet.
How can I make my small engine quieter?
Below are the top ways to deal with the noise produced by your lawnmower.Work on Your muffler. Most lawn mowers have a muffler installed on the engine. … Work on the Deck. … Install Engine Silencers on Your Lawn Mower. … Always Wear Hear Protective Gears When Mowing. … Buy a Quieter Mower.
Can a Boeing 777 fly on one engine?
This means that the aircraft can fly routes that take it as far as 330 minutes (five and a half hours) of single-engine flying time from the nearest viable airport. Other twin-engine airliners, like the Boeing 777, are also certified for ETOPS 330.
What is the oldest plane still flying?
Built in 1909 and now with the British civil registration G-AANG, this is the world’s oldest airworthy aircraft. It is powered by a three-cylinder “W form” Anzani engine. 56 – Bleriot XI airworthy at the Old Rhinebeck Aerodrome in Red Hook, New York.
Can a 777 land itself?
Yes a plane can land by itself using a system that is often referred to as “autoland”. The pilots can program the auto pilot to carry out the landing automatically whilst the pilots monitor the aircraft. However there are limitations as to when the autoland system can be used.
How long can a Boeing 777 fly?
15 hoursBoeing 777-300ER The aircraft can operate for up to 15 hours between long haul destinations such as Los Angeles-Sydney, New York-Hong Kong, Singapore-London, Paris-Los Angeles and Dubai-New York.