Linked Questions

0 votes
2 answers
120 views

How to maximize L/D ratio by design in a high altitude glider? [closed]

EDIT: Some initial confusion with TAS and IAS confused me, I now understand this better, thanks for everyone who helped. I'm designing a high-altitude glider, and I'm wondering how the angle of attack ...
Charles Nicholson's user avatar
0 votes
2 answers
137 views

What airfoil parameter should I focus on to achieve the maximum service ceiling?

I am working on a design competition project where I have to design a low subsonic aircraft for high altitude performance. From what I have studied service ceiling will depend on excess power ...
Mridul's user avatar
  • 1,222
3 votes
1 answer
239 views

What does account for a high coffin corner of a plane?

The Coffin corner is the altitude at which a plane's stall speed is close to Mach 1, the speed of sound (but still below, at the critical Mach number). What accounts for a coffin corner at higher ...
Giovanni's user avatar
  • 209
24 votes
3 answers
11k views

What prevents a small plane like a Cessna or Piper from flying as high as a jet?

Obviously taking oxygen in consideration. What prevents a small plane from being able to fly at a much higher altitude? I know some business jets can fly up to 40,000 ft. Does it have to do with the ...
Boeing787's user avatar
  • 6,454
17 votes
3 answers
3k views

Can the plane Celera 500L be eight times more fuel efficient than a jet of similar size and capacity?

Celera 500L (see Otto Aviation site for more details) is a plane with a single propeller powered by a piston diesel engine. The constructor claims it is 8 times more fuel efficient than a jet of about ...
Robert Werner's user avatar
0 votes
1 answer
1k views

What happens in an F-16 once the aircraft exeeds its service ceiling?

What exactly is the sequence of events that would unfold as an F-16 attempts to exceed its service ceiling? The scenario is simply full afterburner and attempting to simply climb higher and higher (at ...
AlphaCentauri's user avatar
2 votes
3 answers
2k views

What happens if an aircraft goes above maximum altitude? [duplicate]

We all know what happens when a plane goes overspeed... but what happens when a plane goes above their max. altitude? And why are planes certified maximum altitudes anyway? Is it because there won't ...
Air Canada 001's user avatar
-2 votes
2 answers
188 views

Can planes go to space? [duplicate]

What are the reasons why planes can't go into space? https://thehumble.co.uk/aircraft-with-forward-swept-wings/
Dilshan Hiruna's user avatar
1 vote
0 answers
243 views

Why is the F-16's service ceiling 50,000ft? [duplicate]

What defines the service ceiling for aircraft, in particular the F-16? I suppose, as with almost everything, this depends on the aircraft, the engine type, etc. While I'm fine with a comprehensive ...
AlphaCentauri's user avatar
0 votes
1 answer
1k views

Calculating the maximum altitude of a drone [duplicate]

Is there an equation to find the maximum altitude that a drone or quadcopter can fly to ?
Taher's user avatar
  • 101
0 votes
1 answer
2k views

Can a commercial aircraft theoretically reach 60,000ft? [duplicate]

As per this question: Altitudes above 60,000 feet are class E airspace. That means that, if you are lucky enough to have an aircraft that flies that high, once you get there you could theoretically ...
Cloud's user avatar
  • 13.3k
5 votes
1 answer
178 views

What is the background of the maximum altitude formula?

This question What determines the maximum altitude a plane can reach? has a formula at Peter Kämpf's answer : $$\rho_{min} = \frac{2\cdot m\cdot g}{(Mach^2 \cdot c_L)_{max}\cdot a^2\cdot S}$$ Does ...
Samer AlKasaji's user avatar
7 votes
2 answers
1k views

What should be the minimum time spent in cruise (for e.g. a B737)?

Having a short sector to fly, it would not be convenient to climb all the way up to the best cruise altitude, since the time in climb would burn more fuel than that necessary for a flight at lower ...
Andrea Ghilardi's user avatar
1 vote
1 answer
630 views

May planes be flown above the maximum certified altitude?

Let's take the 737NG as an example. The 737NG has a maximum certified altitude (MCA) of FL410. However, looking at the MCP, the maximum altitude that can be set is 50,000ft. And the pressurization ...
Hugo Woesthuis's user avatar
15 votes
3 answers
7k views

What are the limiting factors for high altitude planes (e.g: U2 or SR71) preventing them from going higher?

I'm curious as to why planes like the U2 Dragon Lady and the SR71 Blackbird couldn't fly higher. What physical constraint set their operational ceiling? Pilots wore spacesuits, so that wasn't the ...
Nelson's user avatar
  • 431

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