All Questions

3
votes
0answers
53 views

What is the difference between flutter and vortex induced vibration?

During flutter, the airfoil oscillates with a large amplitude, which generates vortices at the wake. In vortex induced vibration (VIV) the oscillations of the airfoil are caused by the shedding of ...
2
votes
3answers
169 views

For length in aircraft design, and in weight and balance manuals, what measurement unit does Airbus use?

What length measurement unit does Airbus use for aircraft design and in their weight and balance manuals? Meters or centimeters? Possibly they use both like Boeing does for, say, feet plus inches for ...
2
votes
1answer
44 views

To what extent is LLF forecast of icing conditions a concern in VMC?

First off, I know that flying into actual icing conditions in an aircraft not equipped to handle icing is a Very Bad Idea ™ for any number of reasons. That's not what I am asking about here....
7
votes
1answer
315 views

What do you need to do to bring a 737 Max back in service after 6 months in storage?

What kind of maintenance has to be performed on an aircraft if it has been stored for 6 months? For example, do fluid need to be changed, have the tires become flat etc.
-3
votes
2answers
274 views

What is the type of this plane?

I tried looking with aircraft tag on engine but no answers. I just need to find the type of this jet.
10
votes
1answer
289 views

What is the Space Shuttle's command law?

The Space Shuttle was fly-by-wire. In today's fly-by-wire systems, the command law commands either the load factor and the roll rate (e.g., A320's normal law), or the surface control deflection (e.g., ...
0
votes
0answers
32 views

Is there an e-mail address regarding questions on VFR FPLs for flights starting in Germany? [closed]

Is there an e-mail address to use when asking questions on VFR FPLs for flights started in Germany that has already taken place?
0
votes
0answers
24 views

SSIM sample files [closed]

I need to implement a basic SSIM file parser (Chapter 7, Iata SSIM manual). I have 2 questions: has anyone implement such a parser in Java? It is not particularly complicated but if it has already ...
-2
votes
1answer
64 views

Can a TCAS or Marker beacon antenna be installed inside a radome? [closed]

I was wondering how sensitive these systems are. We are planning a modification which will involve either moving these antennas or leaving them in place under a radome (the radome is designed for x-...
6
votes
1answer
141 views

Do any aircraft possess washed-in wing characteristics?

I have been teaching ground school at my local Canadian Air Cadets. When I was teaching about the wing twist of an aircraft, I was asked if any aircraft possess washin characteristics (vs washout). ...
-3
votes
0answers
63 views

Aircraft performance again hourly rate [closed]

I am looking for someone that can help me calculate aircraft performance against hourly rate in the charter.
-3
votes
0answers
86 views

Challenges associated with widespread use of V-22 Osprey [closed]

Why isn't V-22 Osprey's used extensively because of their versatililty and design
2
votes
0answers
141 views

Was the colliding object in the Guadalajara accident ever identified?

In December, four months ago, a 737 landing in Guadalajara apparently hit an object and damaged its nose. At the time it was suggested that it might have been a small drone. Has the object been ...
0
votes
0answers
75 views

Doing a roll with flaps only as controls for pitch [on hold]

In writing a scene for my novel I am working out an idea, if flying an airliner when squeezing in-between a small space to get out the other side do you retract the flaps and ailerons to get a roll be ...
-1
votes
0answers
65 views

Change in target coordinates effect on bomb energy [closed]

Given a bomb that is guided towards a target that is X NM downrange. The bomb does not have a motor. My question is the following. What directional change in the target location will cause the bomb to ...
-2
votes
0answers
48 views

Compressive strength of helicopter reject runway [closed]

What is the compressive strength (psi or N)
6
votes
1answer
1k views

What is this single-engine low-wing propeller plane?

I found this picture in an article about constant speed propellers, but there was no reference to the type of aircraft. The Flickr account that first posted the image doesn't exist anymore. I did some ...
-2
votes
2answers
78 views

If the operator is not the CAMO who is responsible?

If the operator does not have a Continuing Airworthiness Management Organisation (CAMO) and it contracts out its CAMO functions, does the operator remain responsible for the aircraft or does the ...
29
votes
9answers
11k views

Why are there no cargo aircraft with “flying wing” design?

From that I have seen so far, the "flying wing" design (like the one of B-2 Spirit and Northrop YB-49) has superior performance but also a few notable problems that make it difficult to use for ...
-1
votes
0answers
83 views

Experimental 4 seats diesel airplane with or without parachute(BRS) [closed]

Anyone knows any experimental 4 or 2 seats diesel airplane with or without parachute(BRS), experimental/kit or homologated?
-2
votes
0answers
53 views

Time - how to give time check with numericals? [closed]

How do i report time without mentioning numbers? This i ask as a student got this as a question. The Question :"Your aircraft is at (certain) position, report time without numerical.
7
votes
3answers
2k views

Can a drone be seen on TCAS?

On condition that the pilot reports to ATC, an aircraft's TCAS sees a drone in the vicinity. How can the pilot be sure that it was a drone on TCAS? What kind of symbol is shown on TCAS that can be ...
2
votes
2answers
63 views

In the gyroscopic precession left turning tendency, why does a pitch down cause a forward force at the top of the propeller?

I'm a student pilot, and all the textbooks and online resources I'm reading show a pitch down as a forward force acting on the top of the propeller (causing the resulting forward force on the right ...
5
votes
1answer
583 views

Is drag coefficient lowest at zero angle of attack?

The drag coefficient of a symmetric airfoil is lowest when its angle of attack is zero. I'm not sure if this is true in general.
1
vote
1answer
124 views

Why do drones near airports necessitate cancelling flights?

From Wikipedia's page on the Gatwick drone incident: Between 19 and 21 December 2018, hundreds of flights were cancelled at Gatwick Airport near London, England, following reports of drone ...
0
votes
3answers
380 views

Could the Boeing 757 replace the Boeing 737 Max 8/9/10? [closed]

The "Baby Boeing" 737 started life in the 1960s with roughly half the thrust and around 60% of the weight as the 757. In stages the 737 grew into a capacity squarely in the range of the 757. ...
9
votes
4answers
1k views

When communicating altitude with a '9' in it, should it be pronounced “nine hundred” or “niner hundred”?

It sounds a little odd, but trying to understand if that's the recommended way to communicate. E.g. 9900 "Nine-thousand-nine-hundred" vs "Niner-thousand-niner-hundred"
1
vote
2answers
303 views

Why doesn't Stratolaunch have connected tailplanes like it has connected wings?

As a complete layman, the design of the Stratolaunch airplane, especially when reminding myself of its size, seems too flimsy, in that the only connection between the two fuselages is the center wing. ...
10
votes
1answer
1k views

Why did AF447 never return to normal law?

Air France Flight 447 degraded from normal law to alternate-2B law when its pitot tubes were temporarily filled with ice crystals, resulting in a loss of airspeed data. As a consequence of being in ...
2
votes
1answer
297 views

Why didn't Boeing make the Sky Interior for the Boeing 777?

Generally, Boeing has attempted to make the interiors of their aircraft as similar as possible, with one "unified" interior across different aircraft (i.e. based on a single "look and feel" for you UX ...
5
votes
4answers
402 views

Why are the AOA sensors placed outside the aircraft?

Why should the AOA sensors be placed outside the aircraft? Is it not the angle between the chord line of a wing and a vector representing the relative motion between the aircraft and the surrounding ...
0
votes
1answer
59 views

How to take into account man hour in an SB related to AD?

There are two phrases in any SB included "Total Man hour"and"Elapse time", which quantity should we use in job card for accomplishment an AD or SB?
1
vote
1answer
136 views

Are the nearby airplanes cleared of the sky when launching Falcon Heavy? [duplicate]

I was checking Flightradar24 when launch occurred and didn't see any difference. Also, 3 boosters landed back successfully. I assume the sky has to be clear of airplanes to avoid any potential ...
1
vote
1answer
90 views

How do I calculate the heading to steer in this example?

At 1415 an aircraft was overhead a VOR maintaining radial 215°, en route for B, heading 210°(M). At 1430, the pilot decides to return to the VOR. The heading to steer is... The answer is given as ...
6
votes
4answers
471 views

Why is alcoholic gasoline such a showstopper for aviation?

One of the main reasons the common avgas grades are still full of 3-plumba-3,3-diethylpentane is the incompatibility of many aircraft fuel systems with the oxygenates (primarily ethanol, with some ...
-3
votes
2answers
103 views

Is it possible to develop a quadcopter with F35 VTOL-capable jet engines? [closed]

I have little knowledge about engineering so it might be a stupid question but... Is it possible to make a flying vehicle that looks like a quadcopter but uses maybe two jet engines that suck the air ...
1
vote
1answer
66 views

What priviliges and limitations does an Aircraft(General) mechanic have versus an A&P?

The FAA provides practical test standards for Airframe, Powerplant, and General mechanic certificates. Mechanics seem to demonstrate a preference for Airframe & Powerplant, so much that "A&P" ...
2
votes
2answers
132 views

Is any readback required when ATC uses the phrase “RADAR CONTACT”? [duplicate]

As the title says, is a readback required? I've heard some people say that it's not required, while some others say we should readback our call sign only. Some even say just push the transmission knob ...
-2
votes
0answers
97 views

How many flight hours are required to certify the new Boeing 737 MAX-8 MCAS? [closed]

The 737 MAX-8 MCAS is not a typical stall warning system. It was discovered in flight testing that a rapid stall could occur in certain flight configurations due to the new engine installation that ...
0
votes
0answers
76 views

Does a jet fighter intercept cost the airline money? [duplicate]

Last April a TUI flight from Frankfurt (Germany) to Hurghada (Egypt) was intercepted above Montenegro by Italian Air Force ordered by NATO. The order was given because the airline had lost ...
4
votes
1answer
108 views

What are torque events and are they very common when flying a rotorcraft?

On rotorcraft like the MD500 the POH suggests that torque events be recorded in the aircraft maintenance logbook. What are these events, are they common and how many are typically logged during the ...
17
votes
5answers
3k views

Why can't wing-mounted spoilers be used to steepen approaches?

In a comment on this answer to my previous question about tail-mounted airbrakes (lack of), @JohnK states: You won't see flight spoilers (speed brakes) being used to steepen approaches. You have to ...
12
votes
1answer
535 views

Did the FAA order the installation of “Cooper vanes?”

On November 24, 1971, a man hijacked a Boeing 727 and parachuted away, never to be found. According to Wikipedia, this prompted (together with 2 other hijackings) the installation of "Cooper vanes" ...
5
votes
1answer
338 views

What is the procedure for restarting an F-16 in the air?

If there is a flameout on the F-16 in the air, what is the procedure for restarting it? I'm sure this is an elaborate checklist, so I'm only asking for an overview of the key parts, especially I'm ...
7
votes
1answer
2k views

What is this business jet?

It could be a Learjet, but I can't find a match.
2
votes
2answers
109 views

How do I calculate the tail size of my rc plane?

I'm in the conceptual design phase and my plane is supposed to be of 1.7kg. Wing dimensions are 1m*0.3m and AoA that it will fly at will give a pitch down moment of 0.03. The moment arm between CG and ...
7
votes
3answers
2k views

Why is the Constellation's nose gear so long?

The Lockheed Constellation has an enormously long nose gear, which causes the aircraft to slant appreciably backwards when sitting on the ground: L-049 (Image by Greg and Cindy at Flickr, modified ...
0
votes
4answers
129 views

Does an rc plane tail also have airfoil or is it just flat material? [closed]

I've chosen an airfoil for the wing, now i'm confused weather i should do the same for tail or just attach a flat piece of wood as tail. I'm going for conventional tail design. This is my first ever ...
0
votes
0answers
41 views

Oultlet vane guides

I have looked around the web and I could not fine this information. How many vanes are there for the CF6-80 and the CFM-56? Is the count dependant on anything particular, such as fan diameter?
4
votes
1answer
204 views

Can you help me ID these two helicopters?

Hey folks! Desperate to find what these two helicopters are. Any help greatly appreciated!! A

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