滨湖--江苏频道--人民网
百度 在本次榜单中，计算机类专业包揽前三，软件工程排名第一，信息安全紧随其后。
Questions about phases of flight where an aircraft gains altitude.
85 questions
42
votes
5
answers
21k
views
Why did my flight climb so sharply on takeoff?
I was on a Ryanair flight this morning that seemed to perform an incredibly aggressive takeoff from London Stansted on a 737-8. Takeoff was fairly fast, but the climb was the steepest I ever ...
- 545
32
votes
9
answers
9k
views
Is excess lift or excess power needed for a climb?
As answered in this question, aircraft need excess power - not excess lift - to climb. This is plausible when the aircraft's thrust vector has a vertical component (its nose and engine points upwards),...
- 983
25
votes
9
answers
29k
views
Does lift equal weight in a climb?
This subject keeps coming up in the discussions and questions such as this one, which asks if lift equals weight in level flight. Good answers there, pointing out that upwards force has many sources. ...
- 63.4k
17
votes
4
answers
2k
views
Why do planes not fly "backwards" (up from the planes POV) when in a vertical climb?
As suggested by a user in this question, I'd like to ask this question:
One of the most basic aerobatic maneuvers is a vertical climb. This can be achieved by just pitching up to what appears to be ...
- 3,971
15
votes
6
answers
7k
views
Why aren't takeoff flaps used all the way up to cruise altitude?
In general aviation aircraft such as Diamond star DA-40, flaps to take-off are used until 500ft AGL and speed before retracting flaps is Vy (best ROC speed)-67kts and after retracting flaps is 80kts.
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- 1,031
15
votes
2
answers
34k
views
What is the difference between rate of climb and climb gradient?
I am currently trying to study aircraft performance and I have some difficulties distinguishing between rate of climb and climb gradient.
Can someone explain what are the differences between the two ...
- 153
14
votes
6
answers
9k
views
Does a headwind affect the climb gradient?
When studying for my German PPL exam, I came across this question:
For those that do not speak German I'll try to translate the question, but bear with me as it is kinda picky what I'm trying to get ...
- 3,971
13
votes
2
answers
1k
views
What could cause an irregular climbing pattern on takeoff?
Yesterday (Dec 21, 2015), I was on board Ryanair flight FR4966 from London Stansted (STN) to Lamezia Terme (SUF). The aircraft was a Boeing 737-800, registration EI-EFW.
On takeoff, the climbing ...
- 1,389
13
votes
1
answer
972
views
Why is it not a good idea to climb higher than a level at which you would have a cruise weight-climb speed less than 500 ft/min?
In relation with What is weight-climb speed?, why is it not a good idea to climb higher than a level at which you would have a cruise weight-climb speed less than 500 ft/min?
- 131
12
votes
2
answers
4k
views
Under what conditions can the maximum angle of climb be achieved for jet and propeller aircraft?
I know that the maximum angle of climb is reached at maximum specific excess thrust (S.E.T.) for jet airplanes, or minimum drag or maximum $\frac{L}{D}$.
Is this true, and if yes, is this valid also ...
- 1,739
11
votes
1
answer
5k
views
How long did the SR-71 take to get to cruising altitude?
How long did it take for the SR-71 to go from taking off to 80,000 ft, including refueling?
- 417
10
votes
3
answers
33k
views
How can I calculate maximum rate of climb?
By what way and with which variables could you determine a plane's maximum rate of climb per time? If I'm not mistaken, I'm looking for VY.
- 101
10
votes
3
answers
3k
views
A plane is flying at constant velocity in equilibrium, then pitches up. What happens?
This might be a dumb question. And I could probably work it out myself. But here goes! Assume a plane is flying along at some velocity $v_0$ at angle-of-attack $a_0$, using throttle setting $tr_0$. ...
- 974
8
votes
2
answers
10k
views
How is the airspeed-Mach number transition handled in modern airliners?
During the climb phase, how is the transition from constant speed (IAS) to constant Mach number handled? Does the pilot flying have to manually "push the button" on the control panel, or is the ...
- 4,712
7
votes
4
answers
7k
views
What is the relation between aircraft descent rate and speed?
I am an ATCO working in India. I am trying to understand why an aircraft's rate of descent increases, when its speed increases. I am particularly interested in how it relates to jet engine aircraft.
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- 231