how do aeroplanes slow down?

Question

hey. i jut need to know for some h/w. if anyone out there works with planes etc. a basic explanation would be much appreciated!

thanks in advance for any help! :)

Answer 1

Firstly there are lots of ways and techniques used to slow a plane down. I'll try to explain a few of them.
Ok, on the ground most planes are equipped with toe brakes. These are located above the rudder pedals and are depressed using your toes. Other planes may have brakes like a handbrake on a car. Larger planes use "reverse thrust" where the thrust which normally flows towards the back of the plane is deflected forward thereby pushing against the forward motion of the plane and slowing it down.
In the air the principle is much the same as a car, you reduce power to slow down. That is, you pull back on the throttle. The only difference to a car is that in a plane when you reduce power most planes will nose down slightly and start flying downward...thus due to gravity the plane will then try to speed up. To combat this what the pilot has to do is reduce the power by pulling back on the throttle AND either maintain nose level or pull back more on the stick to raise the nose as well.
Of course you can pull back on the stick without removing power and the plane will then enter into a climb at a reduced speed.
Other larger planes are equipped with Spoilers and speed brakes that extend from the wing and basically spoil the lift that the wing is producing. Thus the pilots can keep the nose up without gaining altitude and thus slow the plane. Also, on landing the pilot can keep the nose of the plane off the ground for as long as possible to give the maximum air resistance against the body of the aircraft to slow it down faster on the landing roll.

Other techniques to lose hight and slow a plane down include using opposing (opposite) aileron and rudder. This opposing controls results in the plane wanting to drop like a brick, if you then pull back on the stick to try to maintain height the plane will slow down. (this techniques is commonly used by pilots who fly planes with no flaps to increase the angle of descent)

Hope that helps

Answer 2

Pull back throttles#1 Lower Trailing edge Flaps.some Jet aircraft
have Spoilers#3 some have Defelecters #4 A 7 had a Speed brake on bottom side#5 Some if you are on ground have chute.& of course top of pedal is the wheel Brakes.

Answer 3

In the air they can slow down by reducing the engine power while pulling back to maintain altitude. Some aircraft also have what are called speed brakes that extend into the airflow to increase drag and slow the airplane down. Flaps will slow you down but they are used to increase lift and will allow you to increase your angle of decent.
On the ground the plane is slowed by the wheel brakes, most often controlled by pressing on the tops of the rudder pedals. Most larger airplanes have reverse thrust. On turbo props the angle of the propeller is changed to push air forward which slows the plane. On jet engines the generally have thrust reversers that come down behind the engine to redirect the jet exhaust forward, also slowing the plane down.

Answer 4

On the ground, reduce throttle, brakes,
In the air, reduce powere (throttle), increase angle of attack. Only after the plane has slowed down to what pilots call Vfe can the flaps be lowered. This helps to slow it sown, but mainly flaps are to increase angle of decent with out increasing airspeed.
Power and angle of attack is how a pilot controls speed.(mostly)
Large/Fast planes use spoilers, reverse thrust and even "speed brakes" to assist, but they will not do the job alone.

Answer 5

there are many parts that an aircraft uses to help slow down. they use flaps to increase the surface area of the wing and create more drag to help slow the plane down and help it descend. when they are on the ground the pilot applies the brakes, thrust reversers, and spoilers (not all aircraft have this) to bring the aircraft to a stop

Answer 6

Aircraft reduce speed by reducing power. This is usually accompanied by a lowering of the wing flaps to increase lift and keep the aircraft in the air. To slow down one on the ground, jets use reverse thrust on the engines, along with the wheel brakes.

Answer 7

increase angle of attack or deploy the spoilers while descending. the flaps are used to increse lift at slow speed. cutting the power back will only descend you. there are four forces acting on the aircraft while in flight, so there are many variables in play when you want the aircraft to do something.but as a rule of thumb, power equals altitude, pitch equals speed.

Answer 8

Decrease throttle, pitched up nose, and sometimes flaps (sometimes on small planes, always on larger planes) and once on the ground, reverse thrusters and speed brakes...along with regular brakes

Answer 9

They are slowed down by flaps on the wings. this stops a lot of airflow over the wings to create drag and thats how a plane slowes down. they can also use speed brackes

Answer 10

it relatively is observed as drag rigidity. once you're taking your foot off of the gasoline on your vehicle, the wind slows it down. same on a bicycle. place your hand exterior of a vehicle window on the throughway and sense the resistance from the air. The rigidity is proportional to the sq. of your velocity. For 50mph, the rigidity is proportional to 50 squared. for 100mph (placed your hand out of the window at one hundred - i've got executed this and additionally you are able to truly shop your hand up) and the rigidity is proportional to one hundred squared. For an plane, if the jets arent thrusting, then the air slows the plane down severely at 500mph, 400mph, 300mph, 200mph, 100mph,...you get the element!