When the plane is landng and on the runway does the pilot increase the thrust?

Question

I play a lot of flight sim games and am smart enough to put the spoilers on and flaps down but why does it seem the pilot increase the thrust or is it the speed of sound catching up to me i sit in the back by the wing and always wondered that.

Answer 1

The engine has thurst reversers when reverse engine they increase power in lay terms engine is running backwards.

Answer 2

Actually as the plane touches the ground power is chopped and throttle levers at idle so they can deploy the T/R (unless the throttle levers at idle ) you cannot deploy the T/R. In the fuel pump or Main Engine Control there is a solenoid which gets energized and gives more fuel (thrust) to the engine but the result is reverse thrust as the T/R blocker doors have closed.At the same time the wheel touches the ground and your ground spoilers are armed as the wheel speed becomes less than 60knots (figure not sure) your spoilers deploys.

Answer 3

Since you have said that the plane is on the runway and since you compare it to the speed of sound, I suspect that what you are hearing is the effect of thrust reversers on commercial jet aircraft. I do not recall ever intentionally increasing power in the flare, unless I was really dragging it in and then it was a recovery, not a plan for a smooth landing.

Thrust reversers continue to pull air in the front of the engine, but it is then vectored radially outward away from the engine centerline. This has the effect of converting all the momentum from the inlet air into a braking load instead of a thrust load. The faster the engine runs, the more inlet air is used for braking and the more effective it is. So the pilot deploys the thrust reversers and then runs the engines up to use the engines as brakes instead of as thrust generators.

Answer 4

There's a series of sounds that occur at landing that increase the general loudness of the aircraft.

1. The wheels and the vibrations coming up through the ground causes a lot of shakiness, vibrations, and general noise.

2. The spoilers come up, these might not be so audible since the aircraft is at a fairly low speed at landing, but they will still add to the generic loudness of the landing.

3. As most are pointing out, yes the reversers. Since the panels in the engine open up, the sound absorbant material isn't quite as effective, making the engines sound louder even if they aren't fully powered up. Additionally, in turbofan engines (found on all airliners) the cold airstream (air that does not pass through the combustion chamber) produces 70-90% of the thrust, and surrounds the faster moving hot airflow (which does pass through the combustion chamber) at the engine nozzle. The cold air surrounding the hot air reduces the effects of 'shearing' noise. Once the thrust reversers are activated, the cold air no longer surrounds the hot airflow, increasing the noise level of the engine nearly to that found on turbojet engines (found in  fighter jets). Check it out next time you're at an airport, planes landing are sometimes louder than the planes taking off!

Answer 5

Thrust reversers are essentially just a way to direct the engine's thrust forward to assist in slowing the aircraft down.  After the aircraft has touched down, the TRs may be deployed.  This is what you are hearing.  It helps the aircraft stop in less runway and saves wear and tear on the brake pads.

Answer 6

No Only naval fighter pilots that land on carriers do that. they do it because if they miss the cables they have enough power to take off again.

Answer 7

In most cases, a pilot has cranked out flaps to increase drag and decrease forward motion.  Landing, especially with small aircraft, is a steep approach.  That way, should the engine fail, the landing would not be affected too much.

Experienced pilots tend to increase the throttle a little right before landing to make the landing softer on the plane.  They know what they are doing.