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Questions tagged [terminology]

For questions about words, phrases, and definitions that are specific to aviation or used in a different way in aviation. (Questions about standard words, phrases, and abbreviations used by pilots and ATC specifically in radio transmissions should usually use the [phraseology] tag instead.)

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2 votes
2 answers
217 views

Lightoff to speak about an engine start

Why is the term lightoff (or light-off) used to describe the moment an engine ignite/is started ? I'm wondering why the suffix 'off' is used in an 'ON' sense (start, ignition) ? Is there a ...
8 votes
1 answer
968 views

What is a "confidence maneuver"?

Order JO 7110.65T Section 6 Part 5-6-1 says Vector aircraft: a. In controlled airspace for separation, safety, noise abatement, operational advantage, confidence maneuver, or when a pilot ...
7 votes
2 answers
149 views

When was the word "aerodynamics" first used?

Aerodynamics comes from two Greek words: aer (air) and dinamike (dynamics). In this link it says The word “aerodynamics” itself was not officially documented until 1837 I don't know if that is ...
7 votes
2 answers
5k views

Is there a common name for ailerons, elevators and rudder?

Since ailerons, elevators and rudder are all designed in a similar way, that is, they are attached to a fixed structure from where they move in both direction on that particular axis. For example on a ...
8 votes
4 answers
5k views

What is the purpose of classifying fighters?

Fighters are classified by generation, as explained in this answer. Given this Wikipedia sum up, some fighters are not clearly in a defined generation, especially for 4th generation subclasses. Thus ...
10 votes
2 answers
5k views

What does YF stand for?

I know that F=fighter, A=attack, F/A=fighter/attack, B=bomber. I can not find any information on what YF stands for. This type of aircraft is usually an experimental aircraft, but why do modern ...
1 vote
1 answer
209 views

What is the difference between gross weight and MTOW in an aircraft specification?

On Wikipedia you often find aircraft specified with a separate "gross weight" and "MTOW". The term "gross weight" implies "weight with maximum fuel and payload"....
2 votes
1 answer
278 views

Definition of long-haul flight

Who determined the definition of what a "long-haul" flight is? By implication, this presupposes definitions of "short-haul" and possible "medium-haul"/"extra-long-...
3 votes
3 answers
47k views

Do ATC say "Climb to XXXX on standard" or "Climb to standard XXXX" or something else?

Do ATC say "Climb to XXXX on standard" or "Climb to standard XXXX" or something else? By "standard" I'm referring to altimeter pressure settings (set to standard pressure)...
0 votes
0 answers
91 views

Does the following sound realistic as callouts during takeoff?

“Set power.” “Power is set.” “80 knots.” “Check.” “Constant power.” “V1.” “Rotate.” “V2.” “Positive rate.” “Gear up.” I am unsure about "Constant power." The original text I am translating ...
0 votes
1 answer
235 views

How do these lines sound as ATC communications?

These are translated lines from a fictional story in Chinese, written by someone who (like me) does not work in aviation and therefore does not have firsthand knowledge of these things. Therefore, it ...
1 vote
1 answer
96 views

What is the definition of in-flight for the purposes of a fire?

Reading 49 CFR 830.5 I am trying to determine the definition of "in flight" and "in-flight" used in the Immediation Notification sections 49 CFR 830.5(a)(4) "In-flight fire&...
0 votes
1 answer
118 views

Coordinate system in aircraft. Question about step between lines

Good day! Can you help me? I doing a restoration of the plane's geometry. I want to do restoration use a theory. But I have not information about step (size) between B.L. (W.L.) lines. As example - ...
0 votes
1 answer
136 views

Could someone help me make this checklist-execution dialogue sound correct?

I am translating from Chinese a dialogue that involves two pilots going through an approach checklist. However, all the information I could find on the internet seemed to be for flight simulators (I ...
3 votes
3 answers
682 views

What is the difference between a spin and an uncontrolled roll in an high speed dive?

A comment I had on another (now deleted) question states that China Airlines 006 didn't spin. For me it was a spin (unwanted roll due to asymmetrical stall). The comment states it was "it was a ...
0 votes
1 answer
87 views

What does "localizer level flight" in the approach checklist mean?

What does "localizer level flight" in the approach checklist mean? How might an actual dialogue in the cockpit sound when the approach checklist is executed? Are the words "localizer ...
0 votes
1 answer
133 views

How might ATC phrase an instruction to a pilot to maintain a certain speed and establish glide path?

What might an ATC say to instruct a pilot to maintain a certain speed and establish glide path? My attempts (as someone who does not know much at all about how a plane is piloted) are: "Maintain ...
0 votes
1 answer
156 views

How might an ATC ask a pilot to check the weather conditions at a certain location?

(Working on a translation that involves radio communications dialogue.) Say the location is X nautical miles from the aircraft to a direction that's between the Y o'clock and Z o'clock direction, what ...
0 votes
2 answers
140 views

What might an air traffic controller say to approve a request from a pilot for a certain heading?

I'm translating something that involves radio communications dialogue. Two questions, actually: How would a pilot request a particular heading? (Does this ever happen?) E.g. something like "...
8 votes
1 answer
3k views

How do pilots and flight attendants themselves refer to flight attendants casually?

If, say, a pilot is referring casually to a flight attendant friend (e.g. in an epithetical description), do they use "flight attendant"? It seems a bit of a mouthful. For example: A pilot ...
2 votes
1 answer
166 views

Is there a standard way to identify propeller blades?

Obviously, as Julio pointed out, Chuck's method of identifying propeller blades is ineffective. Is there a standard way to identify blades, other than tautological statements like "There is a ...
0 votes
2 answers
163 views

Why do I keep getting different results to an aircraft's turn radius when I plug variables into different calculators and solve on my own?

I'm trying to solve for an aircraft's turn radius at mach 3.17 (2432 mph) and a bank angle of 19.8; however, after using various online calculators and personally solving the equation, I keep getting ...
0 votes
0 answers
96 views

Is there an equation to solve for bank angle using load factor and wing loading as variables? If so, what is it?

The problem is that I'm looking for both wing loading and load factor as variables to solve for bank angle and cannot find any equation that represents this. After searching various websites and not ...
1 vote
2 answers
2k views

What does pre/post modification mean in Airbus MPD?

What is the difference between POST MOD (with partial mod i.e SXXXX) and PRE MOD (with partial mod) in the applicability column of an Airbus MPD (Maintenance Planning Document)?
1 vote
1 answer
812 views

What is meant by "shroud" in a gas turbine? For example, an inner shroud and an outer shroud in a vane device in a gas turbine? Thank You

Vane device comprises inner shroud, outer shroud, aerofoils. I cannot understand what shrouds are, and their function.
2 votes
3 answers
193 views

accelerated turns in helicopter

In flight Manual of Russian Mi-17 helicopter, it is give that ”max bank permitted in accelerated turns is 45 deg up to 1km altitude”. At the same time it also mention max bank permitted is 30 deg up ...
3 votes
2 answers
2k views

What is the difference between Maintenance planning document(MPD) and Maintenance Manual (AMM)?

Could someone explain to a layman, relatively new to Aviation maintenance, the difference between the Maintenance planning document(s) (MPD) and the Maintenance manual (AMM). Is one a subset of the ...
6 votes
4 answers
2k views

Is the DC-6 Supercharged? And what is a Turbosupercharger?

What it says on the tin. Is the DC-6 supercharged? I thought all planes that fly above around 10,000-15,000 feet need forced induction, but wikipedia doesn't list the DC-6s engines as supercharged or ...
0 votes
1 answer
341 views

What does "Bull's-eye 090, 50, tacked southwest" mean?

In Top Gun Maverick (2022), Capt Pete and his squadrons enters enemy terittory meanwhile they noticed two bandits on the radar: Pheonix: Comanche, what's their heading? Comanche: Bull's-eye 090, 50, ...
-2 votes
1 answer
253 views

What does "a pop-up strike with a steep dive" mean?

In Top Gun Maverick (2022), Capt Pete trains squadrons: Capt Pete: It's the most difficult stage of the mission. It's a pop-up strike with a steep dive, requiring nothing less than two consecutive ...
6 votes
2 answers
6k views

What does "Splitting the throttles" mean?

In Top Gun Maverick (2022), Maverick flies F14 and evades from enemy flight: Maverick: Splitting the throttles. Coming around. What does "Splitting the throttles" mean?
2 votes
3 answers
265 views

What do you mean by "high-G climb out"?

In Top Gun Maverick (2022), Vice Admiral Beau "Cyclone" Simpson speaks to squadrons about enemy terrain: Vice Admiral Beau "Cyclone" Simpson: Well, Lieutenant, you have a fighting ...
-5 votes
1 answer
124 views

What "north wall" is Simpson refer to?

In Top Gun Maverick (2022), Vice Admiral Beau "Cyclone" Simpson speaks to squadrons about enemy terrain: Vice Admiral Beau "Cyclone" Simpson: Well, Lieutenant, you have a fighting ...
25 votes
10 answers
67k views

What's the difference between a balked landing and a go-around?

Is there a difference between a balked landing and a go-around? If there is, what exactly is a balked landing?
3 votes
2 answers
627 views

What would define a thunderstorm that you would stay 20 miles away from?

In summer time, we get pop up cumulonimbus clouds that often develop into thunderstorms. So is there a defined point at which it would be considered a thunderstorm to stay 20 miles away from? Is it ...
13 votes
2 answers
2k views

What is the FAA definition of a "flight"?

For the purposes of aeronautical experience for glider ratings, the FAA requires a certain number of "flights". However, I cannot find a definition of "flight" in the federal ...
3 votes
1 answer
278 views

Why do acronyms aviation often have words in orders unusual?

"Airplane Single Engine Land" (rather than "Single Engine Land Airplane" "Certified Flight Instructor Instrument" (rather than "Certified Instrument Flight ...
8 votes
2 answers
3k views

What is the difference between an aircraft and a projectile?

18 U.S. Code § 31(a)(1) says, The term “aircraft” means a civil, military, or public contrivance invented, used, or designed to navigate, fly, or travel in the air. What exactly is an aircraft? ...
20 votes
6 answers
6k views

What is a "pickle switch" in civil aviation?

In an episode of "Air Crash Investigation" the term "pickle switch" was used. I tried to search this term in all the resources available to me and I didn't find any citation, ...
9 votes
3 answers
2k views

What does Line imply in Line Replaceable Unit?

Does line indicate the aircraft is lined up in hangar (!) and maintenance crew can replace it? Or does it mean something else? Wiki talks about operating location and distances.. What is that?
1 vote
2 answers
246 views

In a push-pull twin, which engine is number one?

I know this is kind of a silly question, but I'm curious. On a "standard" multi-engine airplane, the engines are numbered from port to starboard, with the furthest port engine being number ...
2 votes
1 answer
1k views

What altitude does the "Apt Elev" on the Jeppesen charts represent?

What altitude does the "Apt Elev" on the Jeppesen charts represent? According to my research, the height we call "airport elevation" indicates the highest altitude on the landing ...
3 votes
1 answer
317 views

What is an "emergency squat switch activation"?

I understand what a squat switch does and what it's for: it indicates weight on wheels/skids to indicate that the aircraft is sufficiently on the ground for ground-only things to happen (like ...
0 votes
1 answer
110 views

What is meant by the sentence, "It relates to aircraft handling speeds and circling area development."?

What exactly is meant by the sentence: It relates to aircraft handling speeds and circling area development. For which values does the phrase "aircraft handling speeds and circling area ...
0 votes
1 answer
764 views

what does upwind engine and down wind engine mean?

can anyone illustrate with a picture what does upwind engine and downwind engine mean? for example, i came across this - “The outer engines are critical. If there is any crosswind then the upwind ...
5 votes
3 answers
474 views

What is the name for the spherical type of attitude indicator that also shows heading?

Is there a special name for the type of attitude indicator or artificial horizon that is more or less a complete sphere and includes lines to show the aircraft heading? I've seen them in the cockpits ...
13 votes
4 answers
2k views

Is there a name for change in attitude with respect to time?

I'm in the process of writing a flight-dynamics software program, but I'm not sure what to call the derivatives of the aircraft attitude. If it was in one dimension, they would be the "angular ...
2 votes
1 answer
1k views

What is the difference between position and navigation lights on light training aircraft?

What is the difference between position and navigation lights on light training aircraft (or general)? When I search for both, I find the same lights: red on the left, green on the right, and white on ...
0 votes
1 answer
132 views

What exactly is the interval and duration of occurrence represented by the acronym TEMPO?

What exactly is the interval and duration of occurrence represented by the acronym TEMPO? When we look at this How to interpret BECMG and TEMPO in TAF? question, we see the following in the answer ...
4 votes
2 answers
428 views

What is "negative geometric washout"?

I read that the wing of a hang glider should be tightened with cables so that it has a "negative washout", but I didn't really find anything about what this means

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