All Questions

0
votes
1answer
12 views

Is the time spent flying in a Sailplane concidered a valid flight hour for a LAPL / PPL license?

In order to get a Light aircraft pilot licence (LAPL) license 30 flight hours are demanded, A private pilot licence (PPL) requires to have 45 flight hours. flying in a Sailplane is lower-priced then ...
0
votes
1answer
32 views

How can a Cessna cut the wing of a Boeing?

I read days before about the collision of the flight PSA Flight 182 on September 25, 1978. I was wondering how is it possible that a Cessna 172 can CUT Boeing's 727-214 wing. There is a video with the ...
0
votes
1answer
29 views

When cruising, is any moment that a pilot will reduce his/her airplane speed?

Say, a pilot is piloting his/her jet commercial airplane and suddenly see cumolonimbus or a dark cloud. Then, should the pilot reduce his/her airplane's speed to avoid something like impact?
1
vote
0answers
33 views

Why does Thai Lion Air use loads of 737 ERs for 1-2hr routes?

Thai Lion Air primarily flies short-haul domestic routes and most of the time I find myself on an ER version of a relatively new 737. Isn't ER for extended range? And thus costs a lot more per plane? ...
0
votes
0answers
15 views

what is the earth resistance to be maintained while aircraft is on ground and during ground checks for military aircrafts

While aircrafts are under servicing on ground, the external dedicated earth wires are connected to the aircraft to avoid static hares effect to human beings. How much resistance value has to be ...
1
vote
2answers
72 views

What is this airplane?

I came across this print at a bargain store a couple weeks ago. At first I thought it might be a variant of a Lockheed L-188 Electra; then I noticed that it has at least 6 engines, as the print ...
3
votes
3answers
724 views

How does a single engine tail wheel landing gear airplane turn when it on the ground?

Say Cessna 140 as in this video, look like no additional device to make it turnable when it on the ground. It is a single engine and a tail wheel landing gear. Then, how does it turn?
0
votes
0answers
46 views

Marshall signals history

When airport marhall signals have been used for the first time? Wich is the history about these signals? Thank you
8
votes
1answer
2k views

What is the small cylinder on the firewall to the left of the battery?

What is this and should the yellow wire be soldered to it? Any ideas on preventing the wire from detaching again? I checked the C150 parts manual but didn't see it. Is there somewhere else I should ...
2
votes
1answer
53 views

What is the purpose of the hold at JNC on the Grand Junction Seven SID?

There is a hold on the Grand Junction Seven SID. I would expect it is there so that ATC could hold you until you reach the enroute MEA but there is no written reference. So, what is the reason ...
2
votes
3answers
54 views

Please explain differences between AFM and FCOM manuals?

What are the key differences between AFM and FCOM and where they will be used?
-1
votes
2answers
87 views

Why Engine Exhaust Nozzle can not be totally buried in aircraft fuselage? [on hold]

Why The CD nozzles of the fighter aircraft are always outside the fuselage, Why the whole engine is not buried in the fuselage?? If engine shroud also can be made variable area and varies with CD ...
0
votes
0answers
90 views

How can a Software Engineer interact with the creation of an airplane? [on hold]

I am a Software Engineer in the sector of Automation Testing (on the web and on system testing too). I am trying to focus mainly on aerospace systems and technologies. What I do not really know, is ...
1
vote
1answer
54 views

Which one is more effective produce power of this two turbine's location?

Consider we have the exactly same turbine which is possible to be mounted to the tail (left picture) and to the wing (right picture) as picture below. Which one will produce more power to the airplane?...
4
votes
2answers
151 views

Why was the DC-8-70 successful, but not the 707-700?

The first high-bypass turbofan small enough to use on a narrowbody jetliner was the GE/SNECMA CFM56, which entered service in the late 1970s as an upgrade engine for the KC-135 tanker; Boeing almost ...
1
vote
1answer
103 views

Which international routes might save fuel and time by using a potential newly “deemed safe” North Korean air space?

The Reuters News item Exclusive: U.S. blocks North Korean air traffic revival ahead of Trump-Kim summit - sources says: If the space was deemed safe, international airlines could save fuel and time ...
4
votes
0answers
54 views

Can a private pilot placard an inoperative instrument?

For certificated small aircraft that are not required to have a minimum equipment list. If you have an instrument break while on a cross country flight and it is not a legally required instrument for ...
-1
votes
0answers
39 views

Aircraft engine model [on hold]

For an axial compressor working in steady state condition, what would be the pressure impulse response? Ideally, I'm looking for an equation obtained using the Laplace transformation. Can someone help ...
0
votes
3answers
85 views

Why is carburetor heat unnecessary at full throttle?

Questions like How does aircraft design affect carburetor ice? show how carburetor mount point affects the relative passive heating of the carburetor by the engine, but I've never learned why full ...
4
votes
1answer
110 views

What is this aircraft from ca. 1925 (crash included)?

I recently found the following family pictures from ca. 1925 and have been trying to identify the aircraft in them: A second picture of the same aircraft was taken shortly after the first one: Both ...
0
votes
0answers
13 views

What is the difference between EASA PART 21 Subpart j & g?

I understand that part 21 subpart j is design organisation approval and part 21 subpart g is production organisation approval but can someone explain the main differences and what their relationship ...
0
votes
1answer
101 views

I want to be an airline pilot. Would becoming a NON-COMBAT Air Force pilot be a good way to become one? [duplicate]

I know that becoming a fighter pilot is highly competitive, making it a difficult route, but would becoming a pilot for an Air Force cargo aircraft or something of the like be a good way to reach my ...
1
vote
0answers
30 views

Can someone explain the EASA approval process to fly ETOPS?

First of all does the TC holder (manufacturer) of a new aircraft have to gain approval to state that the aircraft is capable of flying etops to a certain level..? I.e ETOPS 120. Secondly does the ...
1
vote
2answers
75 views

Do any Waco aircraft have model names?

Many aircraft manufacturers give names to the aircraft models. Piper had the Cub, Super Cub, and all the Comanche/Cherokee/Navajo/etc. names used in branding. Cessna has the Skyhawk, Skylane, etc. ...
9
votes
2answers
995 views

Where do standard torque values in maintenance manuals come from? [on hold]

Maintenance manuals of today's civil aviation aircraft (from both Boeing (e.g., B-737) and Airbus (e.g., A320)) have special chapter to describe "standard torque value" for fasteners and connections. ...
5
votes
3answers
1k views

Why do airlines seem to go out of business suddenly? [on hold]

FlyBMI are currently in the news for failing and stranding passengers abroad. This is not the first time an airline has halted operations seemingly overnight and left passengers without a way to get ...
0
votes
2answers
54 views

In turbojet engines, does the fan play a key role in the air intake to the inlet? [on hold]

In turbojet engines, does the fan play a key role in the air intake to the inlet?
2
votes
1answer
108 views

What is this aviation quote?

I remember hearing a quote about aviation that was something along the lines of “asking a pilot why he loves flight is like asking an artist (or a painter?).....”. For the life of me, I cannot ...
2
votes
1answer
60 views

Is it possible to communicate an everyday computer with the ARINC bus? [on hold]

Lately I've been wondering if it's possible to interface an everyday computer with the ARINC buses (either 429 or AFDX). This would be very useful for simulation, testing and prototyping purposes. ...
0
votes
0answers
49 views

Who is responsible for re-declaring the runway? [on hold]

I'm developing a system which recalculates how much of the runway can be used for safe landing and take-off. If there's an obstacle on the runway (another aircraft, surface damage), then who would use ...
3
votes
1answer
66 views

Why does the FMC in B737 limit the climb speed to 230 knots on the VNAV mode until the leading edge devices are fully retracted?

In the VNAN climb on B737, the FMC changes the target speed from V2+20kt at liftoff, to 230kt for acceleration at the preset accleration height, then to 250kt (below 10,000ft) as the leading edge ...
0
votes
0answers
34 views

Is there any companies, programs, or places that offer financial assistance for flight school for those with very bad credit? [on hold]

I am looking into options for flight training. I have already begun my training for my private, but due to a family emergency i had to stop for a few years. Now I am looking to get back into flight ...
1
vote
1answer
69 views

Does heavy air pollution improve takeoff performance?

As you all probably know by now, aircraft have much better takeoff performance when and where the air is denser; this is why flights need to either use longer runways or jettison passengers and cargo ...
3
votes
1answer
48 views

How do barometric altimetry systems compensate for nonstandard pressure lapse rates?

Barometric altimetry relies on atmospheric pressure dropping at a steady rate with altitude, starting from a measured ground-level pressure. This, in turn, relies on atmospheric density dropping at a ...
4
votes
3answers
164 views

Is it possible to convert a passenger A380 to carry cargo?

I heard an expert say that one of the A380's weaknesses is that it only comes in a passenger version, not a cargo one like the B747 does. The cargo version of the B747 makes its market wider. One more ...
6
votes
0answers
93 views
+250

Can pilots tell if a cloud or fog is made out of water droplets or ice crystals when flying through it?

I understand that clouds can be made out of water droplets or ice crystals. And that fog is nothing else than low-lying clouds. However, I've experienced fog in a wide ranges of temperatures. I like ...
2
votes
1answer
79 views

How fast can pushback tugs actually go? (maximum possible speed)

For school, I'm doing a project where we choose a topic about anything, ask questions, and learn about it. I chose my topic as fuel efficiency of airplanes, and one of the things I want to research as ...
5
votes
2answers
375 views

Why would one want to slow to V2 following an engine failure during takeoff?

Reading about the crash of American Airlines Flight 191, the proximate cause of the final loss of control was the pilots' reduction of the aircraft's airspeed to V2, in compliance with the published ...
4
votes
1answer
40 views

Can I execute an ILS approach using a NAV CDI with LOC signal only?

I have been flying a small Cessna airplane that has a COM/NAV NARCO MK12 equipment with CDI (lateral needle only). This CDI does not incorporate a horizontal needle to provide vertical guidance, so ...
0
votes
0answers
30 views

What happens when you apply full cyclic + collective?

Can a helicopter apply full cyclic and then full collective at the same time? Would'nt the blades on one side (opposite of the intended tilt direction) have already maxed their aoa, resulting in a net ...
1
vote
2answers
99 views

Are there any airplanes with the Centre of Gravity behind the Centre of Pressure?

We are used to seeing a forward CG in all airplanes, from a small Cessna to a large Boeing. I wonder whether any airplane with CG behind wing CP exists in production? Is it even possible? If so, what ...
2
votes
1answer
133 views

What does a white diagonal line mean on an Airbus ECAM DU?

When my A321 powers up, the lower ECAM DU shows only a diagonal white line. What does it mean and what would be the fix?
0
votes
0answers
24 views

How does the mounting surface flatness affect radio altimeter reading?

It is recommended that the antennas be installed on flat surfaces. For some UAVs, the bottom of the fuselage is very narrow and sharply curved away from the antennas. How does it affect the ...
2
votes
0answers
38 views

Air flow over an airfoil

We know that in real viscous flow, boundary layer exists around the airfoil and there will be a separation point which flow starts to separate from the back of the airfoil( velocity gradient equal ...
8
votes
1answer
252 views

For how long after the last A380 delivery does Airbus have to provide spare parts for it?

After Airbus's announcement that they plan to discontinue A380 production in 2021 after the last orders are filled, how long will they have to guarantee the availability of A380 spare parts?
4
votes
1answer
80 views

What is the difference between a ground controller and an air traffic controller? [duplicate]

In terms of their roles at an airport. I'm designing a system that would inform its users if there is space on the runway that a pilot could use to land or take off, when there is an obstacle on the ...
2
votes
2answers
77 views

Turboprop vs turbofan (in regional aircraft)

I'm trying to figure out WHY turboprops are more efficient at lower altitudes and airspeed, while turbofans are better at faster speeds and higher altitude. Simplistically, my explanation is the ...
2
votes
0answers
52 views

What is the difference between a weapons training aircraft and an actual combat aircraft?

From the Wikipedia page on the Northrop T-38 Talon: Most T-38s built were of the T-38A variant, but the USAF also had a small number of aircraft converted for weapons training (designated AT-...
4
votes
0answers
72 views

Received ADS-B TC=31 message with non-existent version 3?

On several dates, my ground station received some airborne operational status ADS-B messages (TC=31) where the version number was reported as 3. As far as I know, ...
4
votes
1answer
156 views

Can Ospreys land without running engines?

I just have seen a video of a demonstration of an Osprey V-22. While this is an impressive aircraft I wonder whether this might land with failing engines (with the large "propellers" probably hinder ...

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