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2answers
132 views

Do ETOPS rated airplanes ALWAYS fly with ETOPS requirements?

So, as this is kind of a confusing subject I want to make sure I get a real answer, that's why I ended up doing it here. As ETOPS rated airplanes need to fly with certain rules so they comply with all ...
4
votes
1answer
188 views

Does Molecular Weight of a Gas affect its lifting properties at the same velocity over the same wing?

Let's say we test the coefficient of lift of the same wing at the same AOA and the same flow velocity at the same pressure. The difference is wind tunnel A will contain helium (molecular weight 4) ...
0
votes
2answers
131 views

How much lift is lost by wing dihedral, and can it be fixed?

The loss of lift, though negligible, was mentioned in another thread regarding the angle of dihedral wings. Not knowing the coreect name but will external "ribs" on the wing surface reduce that loss? ...
3
votes
2answers
214 views

Can anyone identify this Biplane?

This Biplane from the 1930's is from an English Airshow. Can anyone identify it? There is now another picture.
13
votes
1answer
1k views

How much maintenance time did it take to make an F4U Corsair ready for another flight?

A coworker I worked alongside once told me that during his time in the Navy, he was responsible for taking care of maintenance on F-22s. He stated that every F-22 required 10 hours of maintenance for ...
2
votes
1answer
79 views

Can a non multi-engine rated pilot get a complex endorsement in a multi-engine aircraft?

I was wondering if a pilot with only an SEP can get his/her complex endorsement in a multi-engine aircraft? I would guess not but since I didn't find any clear info or FAR that sates you can't, I just ...
-2
votes
2answers
115 views

What will be the lift generated by the in-wing free spinning gyros in this design?

Gyrocopters feature a free spinning rotor that generates lift. In this design I have included four free spinning rotors inside the wing of a Cessna 172. Although it will not allow it to take off ...
3
votes
1answer
367 views

What flight controls should be used to counter asymmetric yaw?

How should the autopilot or pilot handle asymmetric yaw, as with one failed engine on a multi-engine turboprop whose engines are not on the centerline? Should one apply roll control or rudder control?
2
votes
2answers
59 views

What is the operational advantage of starting an RNAV SID with a VI-CF leg combination?

I am examining Standard Instrument Flight Procedures, mainly from FAA's charts and Coded Instrument Flight Procedures ARINC-424 file (CIFP). I am keen in understanding the operational advantages or ...
5
votes
1answer
198 views

How does humidity's effects on density altitude get factored into Takeoff Distance Performance Charts?

Given that density altitude is a function of Pressure, Temperature, and Humidity, and most takeoff performance charts adjust takeoff distance as a function of pressure altitude and temperature, how is ...
9
votes
2answers
243 views

Could modern unmodified Airbus aircraft be used for zero-G flight?

ESA operates a mostly-stock A310 for their zero-G science flights, which doesn't have the flight envelope protection of more modern planes. Even then, a third pilot is required to monitor warnings to ...
1
vote
3answers
129 views

What is the difference between TAS and GS? [duplicate]

I'm looking for an explanation of true airspeed and ground speed.
-2
votes
2answers
297 views

What is the typical fuel consumption of a 737 in MPG?

What is the typical fuel consumption of a Boeing 737 in MPG?
2
votes
2answers
165 views

Does taking a long time to solo mean that I'll take a long time for training in general?

I have a fairly high (in my research - 80hrs and counting) flight hours and still no solo, with landings having been a major reason. There is definitely progress - but I am not convinced I'll solo ...
5
votes
4answers
947 views

What costs less energy? Roll or Yaw?

Let's say you want to perform a turn anywhere from 1 to 90 degrees. Which will cost less energy? A bank or a yaw? Using the rudder does produce extra drag, because the control surface is deflected ...
0
votes
2answers
94 views

ARTCC/Handoff etc [closed]

This involved the DB Cooper hijacking. my question would be. Seattle ARTCC handled the flight till the Oakland area. Cooper jumped somewhere near Portland. how easy would it be for the Portland radar ...
1
vote
1answer
77 views

Can I get a sport pilot license while taking Mirapex?

May I get a sport pilot license while taking the medication Mirapex for Restless Leg Syndrome?
5
votes
1answer
257 views

Can anyone help identify this old 1930's plane?

I would like to identify this plane, if anyone can help? All I can tell you is that it is from an old photo album and probably an English Airshow in the 1920's or 1930's.
0
votes
0answers
131 views

Is an 400+% increase in lift with distributed propulsion realistic?

Is an 440% increase in lift with distributed propulsion realistic? I understand NASA swapped out the wings on their test plane with distributed propulsion from 17psf to 45 psf. That's a factor of 2....
2
votes
0answers
64 views

Why is IGN SYSTEM A FAULT dispatch a NO GO on the A320 for EDTO?

In the A320 MEL if Ignition system A is under MEL the aircraft can't be dispatched for EDTO. Why is it specifically restricted for EDTO because even while conducting non EDTO if we go into emergency ...
4
votes
5answers
195 views

Why are aerial taxis multirotored, instead of a single rotor?

source -- image shows Volocopter's design I find that in the designs of aerial taxis, particularly in Volocopter's design, the design consists of a system of multirotors. What is the main reason for ...
57
votes
1answer
7k views

Why are Gatwick's runways too close together?

Gatwick Airport has two runways (08L/26R and 08R/26L), but they are only 200 metres apart - too close (by just ten metres) to allow simultaneous operations on both runways. As a result, usually only ...
3
votes
1answer
150 views

How does an AMRAAM communicate securely with the aircraft that launched it?

From Wikipedia: It also incorporates a datalink to guide the missile to a point where its active radar turns on and makes terminal intercept of the target. An inertial reference unit and micro-...
2
votes
1answer
203 views

May a Cessna 182 land on a major, high-traffic airport, say EDDF (Frankfurt)?

Some 30 years ago a family's friend owned a TR-182 Skylane (Turbo, retractable gear) and we sometimes flew around here in the Rhine-Main area around Frankfurt. Of course he used EDFE (Egelsbach) for ...
2
votes
0answers
82 views

Why would it be logical to call clearance delivery prior to CTAF during an instrument approach?

I am quoting this directly from the FAA's Instrument Procedures Handbook publication. "The communication strip provided near the top of FAA approach charts gives flight crews the frequencies that ...
7
votes
5answers
1k views

Are any jet engines used in combat aircraft water cooled?

Are any jet engines used in combat aircraft water cooled? If they are not, and instead are air cooled, how can the engine ensure consistent cooling? Wouldn't the airflow passing through whatever ...
24
votes
6answers
5k views

Why did the RAAF procure the F/A-18 despite being purpose-built for carriers?

Why did the Royal Australian Air Force (and others) procure the F/A-18 despite being purpose-built for carriers?
4
votes
1answer
166 views

Does one-engine cruise consume less fuel than two-engine cruise?

Scenario 1. A two-engine airliner experiences rapid depressurization and makes an emergency descent to 10,000 ft, and diverts to the nearest airport. Scenario 2. The same two-engine airliner ...
1
vote
1answer
107 views

Can a Bombardier CRJ derate the takeoff thrust?

I have recently been flying a Bombardier CRJ 700 in a simulator and wondered how to derate the engines for takeoff. I know how the takeoff thrust derating is selected in Airbus and modern Boeing ...
1
vote
0answers
34 views

During the Space Shuttle Columbia Disaster of 2003, Why Did The Flight Director Say, “Lock the doors.”? [migrated]

Why does the NASA Flight Director say, "Lock the doors.", when realizing that disaster had struck for Space Shuttle Columbia, back in 2003? Does he mean lock the doors on the space shuttle that's ...
2
votes
1answer
96 views

How could I calculate the correct distance from the runway to be able to fly a continuous downwind to final turn?

I’m not even sure if this is a safe/allowed procedure at controlled airports so it is purely hypothetical. Assuming there are calm winds at the field, is there a way to calculate the distance your ...
6
votes
0answers
115 views

How to know that single engine aeroplanes are not allowed to depart on the TETAN SID?

I'm studying for my IR exam and came across another tricky AIP question. Which of the following statements about the TETAN 1A standard departure chart are correct? Single engine aeroplanes ...
1
vote
1answer
108 views

Descending while turning inbound on a non-precision approach

I'm writing my instrument rating examination soon and one of the questions that I came across was: While executing a VOR A RWY 01 approach for Alexander bay, 2700ft is reached at 8DME on the ...
0
votes
2answers
202 views

What would happen if ultralights had mountain bike style treaded tires?

What would happen if ultralights had off road treaded tires? Mountain bike tires are made for going off road through mud, etc. They have voids between the tire lugs to clear mud etc. Why not off ...
10
votes
2answers
3k views

Is it allowed and safe to carry a passenger / non-pilot in the front seat of a small general aviation airplane?

Is there anything wrong with taking a friend in the copilot's seat of a small general aviation aircraft with me flying, or does he have to sit in the back (if there is one)?
0
votes
2answers
175 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 ?
2
votes
0answers
69 views

If ELAC 1 is under MEL why is it a NO GO item when carrying out EDTO on the A320?

In the MEL for the A320 it is mentioned that ELAC 1 is a NO GO if carrying out EDTO operations. Why is ELAC 1 specifically for EDTO? In that case shouldn't it be for non EDTO operations also. This ...
1
vote
1answer
95 views

Does the wing always have an adverse pressure gradient along the chord?

I know that there is an adverse pressure gradient on the upper surface of the wing, which leads to boundary layer separation. Is there any condition under which there is no such adverse pressure ...
1
vote
3answers
80 views

Under which condition is a forward CG most critical?

This question is from CFI written exam. (6824) “Under which condition is a forward CG most critical?” The answer is “Forward CG is most critical during landing. If it is too far forward, the ...
17
votes
1answer
2k views

What are these silver stripes on Cosmic Girl for?

Cosmic Girl (a 747-400 used for launching things into space)1 has a network of silver-coloured stripes on its empennage, starting at the (closed-off) last cabin window, and going aftward and upward ...
2
votes
2answers
110 views

Why does the FAA not support UL102 (formerly 100SF) unleaded av-gas as an alternative to 100LL fuel?

The specifications for UL 102 are described in this Wikipedia article. The fuel appears to exceed the specifications of 100LL in octane number and energy per unit volume although the fuel weighs 7 ...
3
votes
4answers
159 views

What determines a plane's range?

When a planes maximum range is specified, is fuel [capacity] the only constraint or what else is taken into account? Would it always or ever be the case that a greater fuel capacity will increase ...
5
votes
2answers
220 views

Why are the B-47’s inboard and outboard engines mounted so differently?

The B-47 has six underwing GE TG-190 engines, two on each inboard pylon and one on each outboard pylon. The inboard engines are mounted on a long pylon that extends well below and forward of the wing,...
1
vote
0answers
40 views

Do contra-rotating props have worse tip-vortexes than single props?

As I understand it, blades from a propeller have their own tip vortexes, because the blades produce lift under the same aerodynamic principles as wings. So they must have tip vortexes too. So with ...
3
votes
3answers
187 views

What are the abandoned technologies in aviation industry [closed]

And technologies has come to end of to their life cycle Especially technologies that developed for aviation. This could be a manufacturing technology or an engine rather than avionics or sensors.
3
votes
1answer
150 views

Any biplane flying wings after 1914?

Were any biplane flying wings built and flown after the 1912-1914 variants of the Dunne D.8? If not, why? Wikipedia mentions merely that this type was too stable and insufficiently controllable, but ...
4
votes
2answers
100 views

ATPL - Principles of Flight - Question regarding propeller pitch

In my ATPL books i've learned that for a variable pitch propeller, it is better to have a fine pitch for take-off (higher RPM) and a coarse pitch for cruise (lower RPM). In this question taken from ...
1
vote
2answers
192 views

How Cabin Pressures Are Selected?

The pilot puts the cruise altitude to the FMC and the plane auto adjusts the cabin pressure. I know that but I once heard the cabin pressure is set to three thousand feet. Is it true? Why is the ...
1
vote
1answer
99 views

When Airplane is reducing altitude from flight level (cruise), which one is more efficient

When an airplane is reducing altitude, say due to preparation for landing, the nose is tilted down. That I got from a video on Youtube which explains the way an airplane is going down until it reaches ...
0
votes
4answers
634 views

Is it right to call out out “50…40..30..RETARD” in a C172 simulator?

Playing flight simulator in a C172 (since we don't have any in my local schools) and the 'co-pilot' I fly with (only know him online) insists on calling out "50...40..30..RETARD, RETARD". I know ...

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