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Questions tagged [cruise]

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

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0answers
28 views

How do you find the required angle of attack in degrees for cruise given area, mass, lift coefficient, etc.?

Given area of wings (127.8 m^2), mass, lift coefficient, altitude, cruise speed, and lift curve slope, how if the required angle of attack found to maintain steady level flight? Additionally, how can ...
14
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4answers
6k views

How do planes know what altitude they're cruising at?

I know that when planes enter the aerodome containing the airfield of destination, the ATIS will tell them an altimeter setting so the system knows how to calculate their altitude above their field; ...
2
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1answer
58 views

Learn in-depth about airplane operations [closed]

Currently seeking a book or manual that teaches a civilian how a cargo aircraft operates and what it's pilots do, say a 787. Preferably a high-level overview at a per flight phase: Pre-flight: Flight ...
10
votes
1answer
263 views

Is there research suggesting that VFR cruise altitude rules improve safety?

In the United States, 14 CFR 91.159 prescribes cruising altitudes for level flight under VFR: (a) When operating below 18,000 feet MSL and (1) On a magnetic course of zero degrees ...
0
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2answers
130 views

Why is the normal operating airspeed so much lower than the cruise speed in this table?

I need to work with the following table. I'm interested in vMO which I assume I can simply obtain from converting MMO to vMO through $M = v/ \sqrt{1.4 * 287 * T}$. (Is that correct?) However, I ...
1
vote
1answer
305 views

Why would a plane drop 14.000 ft mid flight?

Just noticed American Airlines flight 221 dropped 14.000 ft mid flight today. Curious, what could have caused this? Here are the flight details.
6
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3answers
365 views

Can airplane performance be increased by cruising “on step”?

Old timers swear aircraft performance can be increased by getting an aircraft "on step" similar to how boats are operated. They claimed a couple extra miles per hour (airspeed was in MPH then) were ...
4
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2answers
211 views

What is the throttle setting of a piston aircraft during cruise?

I am learning to fly nowadays, I am sorry if this sounds like a dump question. What is the throttle setting of an aircraft during cruise flight? After stabilizing the flight after climb do i need to ...
0
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0answers
100 views

Why does the A320 tend to cruise with a slight nose-up attitude? [duplicate]

I'm a frequent user of home flight simulators, and recently started flying an A320 simulation after logging some virtual hours in a 737-800. One of the things that stands out about the 320 as opposed ...
5
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1answer
710 views

What happens if full thrust is applied at cruise altitude for 5-10 minutes on a 787?

What happens when you apply full throttle to the engines of a Boeing 787 at cruise altitude for 5-10 minutes? Other than wasting fuel, what maximum speeds are reached? Does that pose any danger or ...
1
vote
1answer
373 views

What VFR cruising altitude should be flown to the west below 4500 feet?

This is similar question to this question, but different scenario. Let me describe the situation: I am at KDYL in class G airspace. Accroding to ATIS the clouds are at 4700 scattered. I am going to ...
0
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1answer
208 views

How do single GA pilots prevent boredom during long flights? [duplicate]

My question somehow relates to this question asking about how pilots cope with boredom, but now the scenario is not the typical airliner configuaration with two pilots, but with only one. I'm thinking ...
5
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1answer
2k 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 ...
2
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2answers
975 views

What is the Fuel-Oxygen ratio for a large turbofan at cruise conditions?

What is the Fuel-Oxygen ratio (by mass) for a large turbofan at cruise conditions? In order to be concrete, I'll just pick an engine at random. I pick the GE90-115B. Okay it's not really random, it'...
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1answer
105 views

The condition that wind would effect indicated airspeed [closed]

What is the one condition that wind does effects our indicated airspeed?
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3answers
2k views

How does change in airspeed affect pitching moment?

In aircraft with conventional elevator control, if I increase the speed, the horizontal tail sees higher velocity and hence higher lift. Does it mean that increasing airspeed creates nose down ...
4
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0answers
383 views

How much does a Boeing 737 wing bend/deflect in cruise conditions?

As a part of my ongoing research of a structural joint analysis of a Boeing 737, I have been looking for sources where I may be able to find the bending/deflection data during cruise conditions. I ...
23
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1answer
3k views

How much leverage do commerial pilots have on cruise speed?

If you fly frequently there are chances you have seen some delays in departure where you end up waiting in the aircraft sometimes for multiple hours. Almost every time that happened I remember the ...
6
votes
2answers
1k views

What is a Cruise Captain?

I wonder what is a Cruise Captain, albeit I assume they are here to fly the cruise phase. Differences in responsibility / authority with a Captain? From training / certificate standpoint, what is ...
41
votes
1answer
3k views

How can an altimetry system error during cruise (500 ft at 35000 ft high) cause an insufficient fuel situation?

So my boss gave me a question today as my daily quiz: Let's say an A321 is cruising on a 6-hour flight. It reaches FL350 30 minutes after take-off. After another 8 minutes there's a discrepancy ...
1
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0answers
202 views

What is the order of Reynolds number inside the Compressor at cruise conditions?

I am doing a CFD study on a probe that will be installed inside a compressor of a civil aircraft for my final year project. I need to know the Reynolds number inside a compressor at cruise conditions. ...
1
vote
1answer
2k views

What are the effects of headwind on ground speed and take off run? [closed]

I'm just making sure I got this right. For the take-off roll, having headwind is preferable, so there is a positive airspeed. For the en-route segment, a headwind is not ideal and increases time to ...
3
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1answer
422 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 ...
10
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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 ...
1
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1answer
474 views

Which cruise altitude is prefered in engine-out operations of Boeing airplanes?

On Engine Out Operation in Boeing Airplanes, which altitude is preferable, the OPT Altitude, the MAX Altitude or the RECOM Altitude of the ENG OUT CRZ Page?
7
votes
1answer
642 views

Can cruise pilots/second officers go for years without doing a takeoff or landing?

I was looking at the description of this role i.e. someone who provides cruise flight relief flying. As conceivably, someone could be bonded for multiple years because of the type rating being covered ...
3
votes
2answers
11k views

How long after takeoff for a Boeing 747-400 to reach cruise speed?

Assume it is fully loaded (pasengers and cargo) and optimal conditions, almost no wind, etc etc... How long after takeoff does the plane reaches cruise speed? If he goes in a straight like on the ...
39
votes
4answers
7k 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... Why such cruise altitudes? What are the important criteria taken into consideration by engineers? ...
4
votes
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? ...
12
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3answers
8k 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 ...
35
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 ...
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.
8
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3answers
14k 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.
31
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6answers
12k 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 ...
20
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3answers
2k 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?