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How far is the first Dual-Cross Country Flight normally? NM...?
Maybe someone could correct me on this, but I'm assuming we're referring to airliners here... It would depend on where you're sitting! If you're in front of the wing/engines on takeoff, then the thrust is being propelled behind you, which leaves most of the noise behind you, and with doppler effect involved, it will be quieter than normal. However if you're in front of the wings/engine on landing, and they reverse thrust, the opposite will occur and the thrust will be aimed ahead of the plane, going by your window, and making it louder.If i chose to apply for a helicopter licence,?
If you're behind the wing/engines, than it will be the opposite. Anyone can correct me if i'm wrong, thats my answer though.
Someone go get a dB meter and test this theory if you dont believe me. Why do you think first class and other higher paying customers sit in the front of the plane, obviously they aren't thinking about being the first to die in a giant lawn dart.
Hi what part of this trent 500 engine, does the primary combusted air come out of and the by-pass?
If you're outside the plane, it still rides on the same theory. Sound is omni-directional. All sound could be considered RF, so imagine yourself with an omni-directional antenna emitting an HF signal, at full power with no obstructions, you should recieve the RF at equal power in all directions. Now, put a small wall right next to it, you're going to have a weak spot behind that wall, you'll still pick it up, but not as strong. Now put translate this to engine noise.... on takeoff AND landing, 100% power is used, thrust is directed out an engine and mixes with the outside, creating sound that we can hear. Takeoffs are forward thrust, coming out the back of the engine, most of the sound is directed behind the plane. Now imagine being in front of the plane, you have the front half of the engine and a slight bit of a wing blocking some of the noise. It wont be as loud as if you were behind the plane.
Throw everything in reverse for landing, thrust coming out the front of the engines, and stand behind it. Sound is still slightly attenuated.
Ok i think anyone reading this has gotten the point, my fingers are tired now that i've blabbed my hands off, sound has to do with where you are and whats in your way thats attenuating it.
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Go dB meter it if you dont believe me
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Take off takes longer but is slightly less noisy, where as landing is very loud but for a shorter amount of time.My boyfriend is an airline pilot....it depends....from inside the aircraft upon reversal of the engines it is louder on the inside for passengers but for people outside takeoff is louder because the engines are at nearly full thrust for the entire takeoff.
i understand that a helicopter has rotors on top to lift it off the ground?
My recollection, having flown commercially most all my life, is that the answer is yes. Their engines have to work harder to resist the motion they're in at the moment, whether that be inertia or forward motion. But that's just my recollection and explanation. Maybe you need a more technical answer. God Bless you.Why Do airplanes have to go up at a very high altitude when traveling?
They are louder on take off because the pilot is applying full throttle for maximum power and speed, landing is the exact opposite. hence less engine noise.proofread part two of my airfoil essay.?
Sammy has about go it, Take offs are loud account of full thrust, But when landing the pilot reversed the thrust to slow down and this is probably loudest for short time only.Why do pilots use VOR instead of just going in a straight line?
They make more noise when they are taking off, because they ae full throttle, redlined and making the most thrust/horsepower.They do make weird noises on approach but are at 1/2 power or less, they jockey the throttles to maintain a specific decent rate. This also depends on the type of aircraft engine, but almost all are noisier on takeoff.
i would have to say take off is louder since the airplane is under full power
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in my point of view i think it is during take off because the pilot is puting it on full throttle for all the power to take off which will make more noise...when your landing the pilot lowers the throttle cause he doesnt wanna be going at 500 mph on a landing lol the runway wont be long enough lol ...so yeah i think its louder on take off then landing...black boxes in aeroplanes. what data do they record exactly?
I think takeoff as it is full powerWhy was Air Traffic Control not able to notice something wrong in time on 9/11?
Normally:TKOF= Full power
Landing= reduced to minimum power
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Helicopters are different. Full power on landing.
TKOF= whatever it takes to get off the ground
Duel Cross Country Please Help?
That question really leaves things somewhat open. An aircraft making takeoff power is basically as loud as it gets to people off the airport, i.e. adjoining neighborhoods, etc... Landing aircraft do make quite a bit of noise and does sound loud but then again, a landing aircraft is lower to the ground than one departing making it sound loud. At one mile from the airport, a landing aircraft is usually around 600-800 feet, one departing is usually climbing through 2000 feet a mile from takeoff point. Now, after touchdown, when the jet deployes its thrust reversers, there is quite a bit of noise there also but mostly to people listening from within the airport boundries. This noise is close to the ground so it doesn't travel quite as far and is dampened by the ground.If you were a pilot what are you supposed to do?
Dont be cheap rent the headsets and dont worry about it!An aircraft is will always be louder on take off! Engines are at full throttle to gain the needed speed for lift off.
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While on landing engines are powered down in order to descend.
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It is like a car more fuel more noise, less fuel (or brakes) less noise
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............. the sound or noise comes from the engines ............. they are working at max. during take off .......... and at the same time the aircraft is accelerating forward and gets airborne ........ hence the point of noise is shifting all the time ........ therefore you don't feel it as noisy ............. however during landing .......... engines again come to play ... as reverse thrust , for a short time ...... and since the aircraft is stopping and the sound remains in the same area , it seems more noisy ............How B777 is called 21st century airliner?
Generally.All aircraft use full power during take off roll.
This is to get the aircraft airbornee in the shortest time possible.
Therefore the engines are at full power during take off roll and when airborn and at climbing Best Rate of Climb, they throttle back to the aircraft procedures or Noise Abatement procedures for that particular airport.
When landing aircraft throttle back to descend. Hence less noise.
After they touch down a commercial aircraft will use reverse thrusters at full power for approximately 10-15 seconds.
This changes with each aircraft and runway conditions.
So they are "generally" louder at take off because the engines are running at full power for an extended period of time.
Landing is loud for a lot shorter period of time.
Well, takeoff is pretty loud as the engines are on full throttle. But landing is much louder because the aircraft uses reverse thrust to slow down. This reverse thrust uses a method just like blowing into your cuffed hand. the air comes back at your face. So this is very loud.
louder while landing. i live in greenford, london 7.5 miles away from heathrow and i still hear aircraft kicking in their reversers
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