Questions tagged [cruise]

The section of flight between the after takeoff climb and landing approach.

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50
votes
4answers
9k views

Why are many jet aircraft designed to cruise around FL350-370?

If the flight distance permits, the B737-800 will cruise at FL350, the A320 a little bit higher... Flying at FL370. Photo: Live from the Flight Deck by GolfCharlie232 (reframed) Elements such as ...
4
votes
1answer
1k views

How can you find the best altitude for range or speed?

How can you select best cruise altitude (altitude for best range velocity) and maximum speed altitude? The specific case is a turboprop aircraft of gross weight 8000 lb.
36
votes
3answers
4k views

When might a pilot hand-fly a jet at cruise altitudes, and is it difficult?

How difficult is it to hand-fly a jet at cruise altitudes? Other than autopilot failure and just doing it for the fun of it, when might you want to hand-fly at those altitudes? I suspect the answer ...
32
votes
6answers
15k views

Why do airliners pitch up during cruise?

In my experience as a passenger, when the plane stands at the airport and you enter it, the aisle is pretty much horizontal. (Obviously, I've never flown on a DC-3). After takeoff we pitch sharply ...
12
votes
3answers
11k views

What is the wing angle of attack of a Boeing 737 in cruise?

I would like to know the angle of attack that a 737 flies at during cruise. I am specifically interested in the wing angle of attack (if you know the cruise nose-up attitude and the wing incidence ...
25
votes
4answers
5k views

Why are heavy flaps better than just a bigger wing?

Flaps increase lift during landing and T/O. But when retracted, they do nothing. The space needed to stow the common fowler flaps can't be used for anything else - fuel or structure. Extended flaps ...
10
votes
2answers
1k views

Will control surfaces on a plane be less efficient at a higher altitude?

I may be wrong but I learned that control surfaces depends on the air flow to work properly, and that airliners have a higher cruise altitude because of the less dense atmosphere, improving the fuel ...
6
votes
1answer
6k views

What throttle setting does an airliner use while cruising?

As a passenger, I have always felt like the engine are not kept at take-off thrust/full throttle a few (tens of) seconds after take-off, and so for obvious reasons as fuel efficiency, engine wear ...
20
votes
3answers
3k views

Why do pilots announce the cruising altitude of a flight?

At some early stage in the flight, why will commercial pilots announce the cruising altitude of the flight?
5
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4answers
1k views

During which part of the flight the effect of air resistance is more important?

Her teacher asked this question to my niece (8 years old)? However I couldn't find a solid answer either. In which part of the flight, the effect of the air resistance (drag) is more important? ...
8
votes
3answers
16k views

How do pilots decide what their cruising altitude will be?

When filing a flight-plan for a long-haul high-altitude IFR flight, how do pilots select a specific cruising altitude? Typically in the range of 25,000 - 35,000 ft.
3
votes
1answer
591 views

What would happen if thrust reversal is accidentally deployed during a flight? [duplicate]

Is it possible to deploy the thrust reversal, in the cruise phase of a flight? And, if they are accidentally deployed, what could be the possible consequences? As the cruise phase requires a lot of ...