佩奇是什么意思
百度 在海南岛战役中，国民党军队拥有海空军优势，因此护卫力量显得格外重要。
Aircraft performance covers areas such as the amount of runway required to takeoff or land and how fast an airplane can climb or descend.
1,025 questions
3
votes
1
answer
77
views
Is Vy a function of Pressure Altitude Only?
Preface:
This question is about Vy in KIAS - not Rate of Climb. I understand that ROC is a function of pressure altitude and temperature (density altitude)
This question is regarding knots INDICATED ...
- 494
2
votes
1
answer
270
views
Can a quadcopter do controlled flight after one motor failure?
I'm curious of the performance and/or if/how can a quadcopter recover after one motor failure.
I'm trying to find tests of that but the closest thing I've found is this Jetson One Motor failure test, ...
- 7,483
-3
votes
1
answer
167
views
Would a Boeing 787 fuel cutoff switch allow fuel to flow if it was not locked? [closed]
Based on reading from this question, could a fuel cutoff switch be active (allowing fuel to flow) if it was moved (pulled, lifted, and moved) from the cutoff position to ON without being relocked?
Not ...
- 22.5k
6
votes
3
answers
730
views
Lower Specific Excess Power, Higher Altitudes Achievable?
This diagram plots the Ma, Altitude and Specific Excess Power (SEP) of a specific military aircraft:
Why does a lower SEP allow for higher altitudes and a larger range of flight speed?
- 313
0
votes
3
answers
2k
views
Can a turbofan airliner climb with clean wings upon take-off?
question
Assuming full thrust on both engines, is a turbofan airliner close to the ground right after take-off capable of climbing with clean wings (i.e. with neither flaps nor slats deployed) ?
If ...
- 3,808
3
votes
6
answers
1k
views
Why doesn't pitching up above vx result in a better angle of climb
Like technically, you could pitch up higher. I have drawn a (greatly exaggerated) picture to show what I mean.
3
votes
2
answers
747
views
Is the airspeed for best endurance also the airspeed for best angle of climb?
Understanding that for a propeller driven aircraft, the airspeed for best endurance is the speed at which minimum power is required, and obviously the prop is more efficient at producing thrust at ...
- 31
12
votes
3
answers
3k
views
How much performance is lost from stealth design considerations for fighter jets?
Fist of all, I understand the question is quite broad, so I'm mainly after a broad brushstrokes answer. Is it 'a lot', or merely 'just a little bit'?
How much do stealth design considerations (i.e. ...
- 223
2
votes
3
answers
235
views
How does air temperature impact cruise range and performance?
[1966 Cessna 172G Cruise chart]
In the shown Cruise performance chart it states that it is standard conditions. If a normal lapse rate at 7,500 ft is 0 celsius how would I see accurate values if my ...
- 641
15
votes
2
answers
4k
views
Can an airliner fly with only 1 out of 4 engines operating?
If 3 out of 4 engines fail mid-flight, can a commercial passenger aircraft still perform level flight?
Obviously, the aircraft will not be able to maintain its 4-engine cruising altitude. But can it ...
- 175
6
votes
1
answer
204
views
Why take-off N1 decreases in the FMC when we switch on the PACKs?
I know that I have asked similar question recently, but I still don't have a good answer. I noticed that (on a 737 NG/MAX) when we switch on PACKs during Before Taxi Procedure or for the APU, the take-...
- 2,227
-1
votes
1
answer
133
views
What is the correct procedure for disconnecting PC Air from the aircraft? [closed]
What is the correct procedure for disconnecting the PC Air from the aircraft??
Notify the Flight Deck Crew PCA will be disconnected and wait for acknowledgement
Turn the switch from FAN ON to GEN ON
...
4
votes
1
answer
491
views
How does engine bleed impact N1 and EGT
Could somebody explain impact of bleed air extract from engines on take-off N1 and EGT? As far as I know (considering 737NG) using engine bleed air decreases calculated N1 for take-off by the FMC, ...
- 2,227
3
votes
1
answer
272
views
Aircraft behavior different between chandelles and lazy eights?
I'm working towards my commercial.
In doing lazy 8’s many people have stated just let the nose fall through the horizon at the 90 degree point of the maneuver, because with the bank imposed we don't ...
- 641
3
votes
2
answers
168
views
If I am flying below maneuvering speed but well above stall speed in a steep turn, is it still possible to over-G the airpane?
I have thought myself into a conundrum:
A hypothetical (DHC-8-106) airplane has the following limitations at MGTOW:
VA 164 KIAS
VFE 148 KIAS
VS 80 KIAS (flaps 15°/bank 0°)
Load factor limit of 2 G ...
- 51