Questions tagged [aircraft-limitations]

All aircraft have specified performance limitations that they cannot (or at least should not) exceed, for altitude, speed, weight etc.

Filter by
Sorted by
Tagged with
0
votes
2answers
127 views

Why can airliners not fly as fast as fighter jets? [duplicate]

Why do passenger aircraft not fly at the speed of fighter jets? What factors stop them from achieving such speed?
8
votes
3answers
2k views

Why can we not use full throttle in a C172 when cruising at lower altitudes?

My flight training manual (FTM) says that at low altitudes we throttle back our trainers in order to not exceed recommended power settings. But why is that? Is the air close to sea level just too ...
1
vote
0answers
79 views

Why is the flight with landing gear down speed limit lower than the FCOM limit on the A320?

While going through the A320 FCTM supplementary procedures for the flight with landing gear down. It's mentioned that the speed limit is 235kt/M0.60 and that to enforce this in the avionics bay there ...
2
votes
0answers
116 views

What factor governs the -1000 feet environmental limit on the A320?

In the limitations chapter of the FCOM for the A320. There is a max and min altitude for normal operation. The reason is clearly given in the AFM for why the aircarft can't operate beyond 39800 feet. ...
0
votes
0answers
69 views

If the stick pusher fails on a Bombardier Q400, what happens to the c.g. limitation?

If the stick pusher fails on a DHC/Bombardier Dash-8 Q400, what happens to the center of gravity limitation?
0
votes
1answer
168 views

In aircraft where the thrust reversers are not locked out when airborne, is it permissible to go around after reverser deployment?

In general, a go-around, in a jetliner, must either be performed before thrust reverser deployment, or not at all. This is because, if a go-around is attempted after the reversers have been deployed, ...
1
vote
1answer
120 views

Why would larger aircraft have higher crosswind takeoff and landing limits than smaller aircraft?

In a response to an earlier question about the paucity of runways at major British airports, a major theme was that the advent of larger, heavier aircraft with higher maximum-crosswind limits for ...
1
vote
0answers
107 views

What are flight envelope limits of the Stearman Model 75?

Recent monopropeller aerobatic aircraft such as the Zivko Edge 540 have impressive flight envelops limits (up to ±12G, $V_{NE}$ (230 kn) up to 4 times its stall speed ($V_s = 51kn$), low stall speed, ....
8
votes
1answer
2k views

Why shouldn’t the A330/40’s speedbrakes be used in alternate law?

On page 30 of the ATSB report into the QF72 accident (page 50 of the PDF file of the report), in a table describing the actions required of the flightcrew in response to some of the ECAM messages ...
2
votes
1answer
88 views

Why are Category II ILS approaches prohibited in an E-Jet with inoperative pitch trim?

Part of the Pitch Trim Runaway checklist for the E-Jet family states that Category II ILS approaches are prohibited if neither pitch trim channel is available: If both pitch trim channels are failed: ...
3
votes
2answers
225 views

Does burning fuel to get to your max landing weight violate any regulations?

Consider a hypothetical situation where where an unexpected tailwind will cause a flight to arrive at its destination above maximum landing weight. After reviewing all reasonable changes to altitude ...
1
vote
3answers
275 views

Are fly-by-wire fighters protected in AoA?

When thinking about fly-by-wire, I always think about civilian aircraft (Dassault Falcon 7X, Airbus A350...) for which protections are implemented to ensure the aircraft stays in its designed flight ...
4
votes
1answer
92 views

What is pressurization influence (if any) on maximum G load an airliner can withstand?

Reading here about skin thickness of airliners I was wondering if, considering some pressurized airliner at cruise altitude, there are differences in maximum operational acceleration loading the ...
0
votes
1answer
210 views

Why would Boeing be under review if crew-error is determined to be the cause? [closed]

The captain on Lion air's flight 610, re-trimmed the aircraft through 21 MCAS activations. The first officer, who was given control of the aircraft, got 5 more. Although it is speculated that neither ...
1
vote
1answer
215 views

Where and when would a 737-700 be taking off at an altitude of 19 kft?

Another question triggered by reading the 737 technical site; according to this section of the page on the 737's pressurisation system, the 737-700 comes with an option that allows it to safely take ...
15
votes
1answer
4k views

Why is a 737 Original speed-restricted below 10 kft with inoperative windscreen heating?

According to this page on the 737's operational limitations, the Original 737s (737-100/-200) are limited to 250 KIAS below 10 kilofeet if the windscreen-heating system is inoperative: Anti-Ice & ...
1
vote
1answer
190 views

Exceeding VLO and by how much is too much?

Piper Seminole (PA-44-180) VLO (max gear retraction speed) is 109 KIAS. I've heard that manufacturer published limitations are significantly lower than actual structural and system limitations. What ...
6
votes
2answers
2k views

Is it right to extend flaps only in the white arc?

If the cruise speed is >80kts on the downwind leg but I can only extend flaps in the white arc, am I right in saying I need to get to the white arc, even if I'm on - for example - 100kts? For ...
0
votes
2answers
640 views

Why is FL398 the REC MAX altitude on the A320?

On the A320 PROG page and in our limitations the REC MAX/ MAX FL is listed as FL398. What is the reason behind this ?
9
votes
2answers
1k views

What makes the Antonov An-2 have no stall speed?

The Antonov An-2 is notable for being able to fly at a very low speed. However, what confuses me is that it has no stall speed: The An-2 has no stall speed, a fact which is quoted in the operating ...
0
votes
1answer
491 views

What is the largest and heaviest payload ever flown?

Not counting the plane what is the largest or heaviest payload ever flown?
1
vote
3answers
156 views

How to apply the TO/GA time and EGT limits?

If there is a published 1) EGT limit and a 2) TO/GA time limit, which one should be applied when the EGT is well below the EGT limit and possibly even below the 'max continuous' EGT. Particularly with ...
1
vote
0answers
162 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 ...
3
votes
1answer
592 views

What is the critical altitude?

What is the definition of critical altitude and why is important to know in Vmc graph? Also, is there any critical altitude in the Piper PA-44 Seminole?
-1
votes
1answer
268 views

What is Temperture of VSI and limits of accurate value?

Within a temperature range of +50C and -20C the VSI is Accurate to within limits of : A)+- 200 ft/min B)+- 0 ft/min c)+- 75 ft/min D)+- 300 ft/min
4
votes
1answer
532 views

Is extreme wind shear an official classification? Is it rare to land in 65kts headwind, gusting 95kts?

I was a passenger in an A340 during a famous storm 65kts gusting 95kts. Resulted in a go around, but the plane sunk quite fast several times. Is this rare? Are there limits to headwind component? The ...
1
vote
1answer
1k views

If all passengers moved to the back, front or one side, would they crash the plane? [duplicate]

all-time classic: Would the load shift of all passengers herding at the back, front or one side make the plane hard or even impossible to keep in the air ? Are there any passenger aircraft where ...
-11
votes
6answers
1k views

How much can I exceed crosswind limits by? [duplicate]

I'm learning in a Tomahawk. They have a maximum demonstrated crosswind component of 15 knots. My school has a limit of 12 kt, but will only allow students to fly in 50% of that, so 6 kt. Since it's ...
2
votes
1answer
192 views

Flying from right seat of Socata TB9 - confused about Pilot manual limitation (US regulations)

I was comfortable flying from the right seat in my Grumman American AA5A and would let non-pilots sit in the left seat to introduce them to flying. I was expecting to do the same in a friend's TB9, ...
4
votes
2answers
317 views

Would a refueling stop be cheaper than finding lodging for all the passengers?

This is somewhat late followup question to my original question. Basic story was flight got delayed by almost 24 hours because first, technical reasons, secondly temperatures were very high. As far ...
7
votes
6answers
5k views

Is it okay to take off with weight more than the POH max gross weight?

I wonder if I could take off with weight more than the gross weight stated in the POH of my aircraft as long as I take off with a higher speed? I think I have done it once by mistake.
1
vote
1answer
257 views

Why have helicopter top speeds not increased much over time?

With advancements in technology why there isn't much increment in helicopter top speeds from what they were in the 1980s? We have newer designs like the Eurocopter X3 which is a hybrid, but the speed ...
2
votes
3answers
997 views

What are the consequences of throttling up past 100% of N1?

The B737 is probably my favorite aircraft and I'm always sure to never throttle past 100% of N1. I was told the aircraft is pretty much totaled if you take N1 past 100% but you can eke out that extra ...
7
votes
2answers
725 views

Does MMO (limiting Mach number) assume any maneuvering limits?

This answer to a question about emergency descents notes: [Y]ou can accelerate descents by banking the aircraft into a turn. This allows you to increase angle of attack, thus increasing drag to ...
58
votes
6answers
12k views

Is it possible to fly a B-24 under Bixby Bridge?

If that sounds like a ludicrous question it's because I believe it is, but here is why I'm asking. My grandfather flew B-24s in WWII and there was something of a local legend that he once flew a ...
3
votes
1answer
542 views

Why do we have to perform a normal APU shutdown if a fuel spillage occurs?

I was reading in the limitations chapter of the A320 which stated that if a fuel spillage occurs we have to perform a normal APU shutdown what is the reason behind this?
8
votes
1answer
954 views

Why do the old A320s have a lower tailwind limitation compared to the newer enhanced ones?

In my company on the older A320s particularly the ones which are in the MSN 2000 range their tailwind limitation for takeoff and landing is 10 knots. But our newer enhanced ones have a 15 knots ...
21
votes
2answers
7k views

What's the purpose of “over G” penalties in Red Bull Air Race?

This post mentions that if a Red Bull Air Race pilot exceeds 10G acceleration limit for longer than 0.6s on their plane then they are unconditionally disqualified with "did not finish" result no ...
1
vote
1answer
2k views

Do airplanes have a maximum headwind gust component when landing?

An aircraft POH generally gives a maximum demonstrated crosswind component but I have not seen any indication with regards to maximum gust component. I understand that one is supposed to increase the ...
2
votes
2answers
3k views

Why are there different starter limitations for dry cranking and manual start on the A320?

I recently had this point clarified that when we place the mode selector to CRANK on the A320 we can dry crank the engine up to 5 mins. But the moment we place the mode selector to IGN/START then we ...
25
votes
4answers
4k views

Is the aircraft used by NOAA specially modified?

I have just seen this short video showing "NOAA hurricane hunters" flying through current hurricane "Irma". My guess is that normally an aircraft would not be able/allowed to fly in winds sustained ...
3
votes
3answers
3k views

What is the fatigue life of a fuselage based on?

The fatigue life of the fuselage is based on the number of what? Pressurization cycles?
5
votes
4answers
17k views

What is the maximum crosswind limit for a C150/2 aircraft?

What is the maximum crosswind limit for a C150 or C152 aircraft? Does this change depending on the class of licence? Are there exceptions for emergencies?
4
votes
2answers
719 views

How could a PA-28 be made to fly higher?

How would I have to modify the Piper PA-28 to fly at 25,000 feet (same as PA-34 and PA-46)? Could it fly higher? Larger wings, other wingform, bigger motor something else? Do you have to change the ...
15
votes
1answer
3k views

Why can't Norwegian's Boeing 787 operate from Vegas during hot weather?

In a German news article it was stated that the additional weight (Norwegian puts 291 passengers on their 787-8) leads to operations restrictions in Las Vegas when temperature conditions exceed 40°C. ...
-7
votes
1answer
1k views

What are the maximum altitude and speed of a GT500 ultralight?

What are the maximum altitude and airspeed of a GT500 ultralight?
14
votes
4answers
43k views

What is a Cessna 172's maximum altitude?

What is the maximum altitude at which a Cessna 172 can fly?
17
votes
1answer
3k views

Is there anything extra required to spin a Cessna 172 in the Utility category?

I'm trying to find a suitable aircraft to get my spin endorsement for my CFI rating but am running into trouble with most aerobatic aircraft due to my height (too tall). My last thought is that I ...
2
votes
2answers
2k views

Does the Piper PA-28 Cherokee have a limitation on its maximum lifetime flight hours?

Is there a lifetime limit on the (airframe) flying hours of an aircraft (specifically the Piper Cherokee)?
22
votes
7answers
5k views

What sort of issues related to extreme heat (115°F, 46°C plus) would prevent takeoffs or landings?

I recently flew into and out of McCarran Airport Las Vegas (LAS) and a local told me that they never report the air temperature at the airport above 115°F (46°C) because the FAA does not allow ...