Most engines are set up to
produce Low Idle on the ground
and in normal flight. This is termed “Ground Idle” The High Idle setting is set inflight (Flight Idle) so that the engine is spooled up in the event of a missed approach and for a short duration just after touchdown to facilitate rapid reverse thrust.
What does flight idle mean?
An engine RPM in flight at a given altitude with
the throttle set to the minimum, or idle, position. The flight idling RPM typically increase with an increase in altitude.
What does ground idle mean?
The governed RPM on the ground with throttles set to the minimum or fully back position
.
What is approach idle?
Approach idle
ensures rapid acceleration from idle to go-around thrust
(i.e., the engine is spooled up).
Can a plane idle?
No, airplanes cant remain stationary
as helicopters can. This is because remaining stationary means it has zero velocity and hence no lift is produced to cancel the weight.
What is low idle and high idle?
Air intake
: The job of the air intake is to move air into the engine. When it’s damaged, more air can pass through, which will cause the engine to idle high or low. … When it doesn’t work correctly, the engine may idle at various speeds.
What is ground run?
noun.
the distance taken by an aircraft to brake from its landing speed to its taxiing speed
or a stop. Collins English Dictionary.
What is takeoff power?
The amount of power that an engine is allowed to produce for a limited period of time for takeoff
. The use of takeoff power is usually limited to 5 min for reciprocating engines and up to 21⁄2 min for gas turbine engines. This may not always be the case.
What is idle thrust?
Idle thrust means
the jet thrust obtained with the engine power control level set at the stop for the least thrust position at which it can be placed
.
What is the difference between line and base maintenance?
Whereas base maintenance includes activities which require the aircraft to be taken out of service for longer periods and which require special equipment only available in a hangar, line maintenance activities are mostly carried out during normal turnaround
periods
where the aircraft is on the ground.
Why do planes stop in mid air?
Why do planes stop in mid 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.
What RPM do jet engines idle at?
You should check the engine manufacturer’s recommendations, but a good setting for most piston-powered airplanes is
600-700 RPM
. If it is below 600 or up near 800 or 900 RPM, you should have a mechanic make an adjustment to make sure that your airplane does what you want it to do when you close the throttle.
Do pilots turn off engines?
Pilots have come out and said that while we’re in the air eating our boxed dinner or packaged snack,
they turn the engines off
. … It also means that if there is an emergency situation and the engines do fail, flight crews have time to solve the issue.
What happens if idle is too high?
High
idle speeds waste fuel, cause extra wear and tear on your engine
, and can be unsafe as well. If your foot should slip off the brake as the engine revs, it could cause your vehicle to lurch forward, putting other drivers and even pedestrians at risk.
Why does RPM go up and down at idle?
If the engine can’t keep
idling, it will continue trying to get it revved up to compensate
. The cause of the erratic engine you’re experiencing could be a vacuum leak, sensor failure, or an EGR system malfunction.
What causes a miss at idle?
Many system malfunctions can cause misfires or rough idling. Ignition system components, including
spark plugs, plug wires, ignition coils and ignition timing
are culprits as are lean air/fuel mixtures and mechanical issues within the engine.
