Why Do Plane Engines Make Different Noises?

Why do planes have multiple engines?

Before answering this question, let’s set up the case.

2-engine airplanes do need two engines – one is not a spare.

Two engines are better than one, because they allow reaching higher altitudes and actually save fuel.

The higher you get, the less dense air is, which reduces friction and allows reaching higher speed..

What happens when a plane goes too high?

When the plane gets too high, there is insufficient oxygen to fuel the engines. “The air is less dense at altitude, so the engine can suck in less and less air per second as it goes higher and at some point the engine can no longer develop sufficient power to climb.” …

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 do some planes have 2 engines and some have 4?

Less safety and regulatory concerns A major reason for the switch to two engine aircraft is improving safety. Whilst four engines was traditionally seen as safer, this is not necessarily the case. Jet aircraft have proved very reliable – with very few cases of dual engine failure.

What sound does a plane engine make?

The sound of an aeroplane can be conveniently separated into two parts ; a hum, and the unmusical remainder which may be called a roar.

What airline has never had a crash?

Virgin AtlanticThe Virgin group of airlines has never had a fatal crash. Virgin Atlantic began operating in 1984 and serves 33 destinations around the world, while Virgin Australia was founded in 2000 and flies to 52 destinations.

What do pilots say before landing?

Before, or during the descent, the Captain will usually make an announcement with local time and temperature at the destination airport, and time left until arrival. It is followed by an announcement from the flight attendant. … “Cabin crew, please take your seats for landing.”

Can airplanes stop in the air?

No a plane doesn’t stop in midair, planes need to keep moving forward to remain in the air (unless they are VTOL capable). What it can do is simply turn around or go over/under the obstruction. VTOL means vertical takeoff and landing. It essentially means they can hover in place like a helicopter.

Do pilots turn off engines?

No, the engine is not shut down. The power is reduced to idle or to a lower setting (if doing power on touch downs). This power reduction should be done only when you are trying to flare for the landing, that is pulling back on the stick to touch the main wheels first.

Why do planes fly at 37000 feet?

The biggest reason for this altitude lies with fuel efficiency. The thin air creates less drag on the aircraft, which means the plane can use less fuel in order to maintain speed. Less wind resistance, more power, less effort, so to speak. Spending less on fuel is also great for airlines, for obvious reasons.

What happens if a plane engine stops?

An aircraft will glide perfectly well even if all its engines fail. … If both engines fail, the aeroplane is no longer being pushed forwards, therefore in order to keep the air flowing over the wings, the aircraft must exchange energy through losing altitude to maintain forward airspeed.

What does the pilot say before crashing?

THE phrase “Easy Victor” is one that you never want to hear your pilot say on a flight – because it means the plane is going to crash. It’s often used by pilots to warn crew to evacuate the plane without alarming passengers according to a flight attendant.

Why do airplanes have 3 engines?

This was adopted by many regulatory authorities and airlines outside the US (and FAA authority). Of course, long-distance routes over oceans were impossible for twin-jets under these rules – thus requiring aircraft with more than two engines. … This was because three-engined aircraft were more fuel-efficient.

Why do planes make weird noises?

There are many sounds in airplanes. The landing gear being retracted or extended can cause significant noise, the retraction or extension of the flaps can have hydraulic motor noise, and the extension of the flight spoilers causes buffeting and noise.

Why do planes shake when landing?

This shaking is caused by turbulence. … Airplane’s wings can cause wake turbulence as they pass through the air. This can affect planes flying behind one another and is also why planes avoid taking the same flight path during take offs and landings.