All Questions

4
votes
1answer
187 views

Why don't air-cooled radial engines use fuel to cool the oil?

Having read up on WWII air-cooled radials, one thing that struck me is how frequent is the mentioning of external oil cooler overheating, or the need for armored boxes around it, and some even venture ...
4
votes
1answer
110 views

Is “11/2SM” a typo in this TAF message?

In a TAF-message downloaded from NOAA I came across "11/2SM" as the reported visibillity. I have previously seen "1 1/2SM" which I've been told to read as 1.5 SM. is "11/2SM" a typo (should it have ...
0
votes
2answers
90 views

What does the “visibility” number mean on an approach plate?

In the profile view in an approach plate, there is a visibility number next to the MDA or DA. What does it mean? Is it limitation to use the approach?
15
votes
1answer
296 views

What makes it safe for the DC-8 to use reverse thrust in flight?

For most jets, the use of reverse thrust to slow down in flight, where even possible, is extremely dangerous, and strictly prohibited. Not so on the DC-8, which is certified for the safe in-flight ...
0
votes
1answer
169 views

Why would Air France fly to Algeria when it had a civil war?

I was reading about the Polaris Award that was awarded to the pilots of Air France Flight 8969: Algeria was in a state of civil war at the time of the hijacking. Aircraft flying to Algiers faced ...
3
votes
2answers
252 views

Can an Airbus A380 or Boeing B747 fly with only 2 engines?

If during cruising with full load, these two kinds of airplane got two of their engines failure: With one engines fails in each side (so, only one engine works every side). With 2 engines fail in one ...
3
votes
2answers
91 views

How much advance notice does the FAA have to give for a TFR?

I recently heard a story from a friend about a pilot that broke a TFR which was issued after takeoff. This sounds suspicious to me that the pilot had no advance notice of the TFR. Is the FAA able to ...
2
votes
1answer
283 views

What is the purpose of this item next to the cockpit window on the B737?

Hello does anybody know what the purpose of this odd looking shape is
0
votes
0answers
56 views

What % of horsepower in a turbine is used by the compressor section?

If a turbine generates 10,000 shaft horsepower, I am trying to understand how much horsepower has been used to compress the air. So the turbine that generates 10,000 hp must in fact generate 10,000 ...
1
vote
1answer
52 views

What are ARTCC, RCO and FSS and what are differences?

I am confusing what ARTCC, RCO and FSS. and also what do they do? Do they control air traffic by communicating with pilots? Also, do they offer WX information in air born?
31
votes
1answer
7k views

What is the purpose of a walled area in the vicinity of Heathrow Airport?

Looking at a satellite map to the East of Heathrow Airport, there is a small passenger jet parked in a walled off area. Looking at the aerodrome chart the entire area is listed as Bealine Base, which ...
0
votes
1answer
283 views

Will we ever see a single-engined airliner? [closed]

Given the trend in the industry to move towards aircraft with two engines, could it ever occur that we see an aircraft manufacturer develop an airliner with just one? I'm suspecting the answer is no, ...
4
votes
4answers
225 views

What is the maximum angle between an airplane and runway centerline when touching down at a crab angle in a crosswind landing?

What is the maximum angle between the airplane's heading to the runway when an airplane is being landing sideway due to crosswind?
3
votes
3answers
339 views

Is the MD-11's third engine slightly nose up?

From my visual inspection, the third engine (the engine on the horizontal stabilizer) is slightly "nose up", especially compared to the engines on the wing. That means, the front part of the engine is ...
0
votes
0answers
132 views

How much performance penalty is incurred from a WW2-era folding wing mechanism?

I'm interested in WW2-era single-engine piston-prop monoplanes. I'm interested in the folding wing mechanisms from the perspective of performance, chiefly two things: How much extra weight does it ...
7
votes
1answer
961 views

Is there a type of instrument/display that guides pilots along a certain path?

What do you call an instrument that can help a pilot fly along a predetermined flight path (e.g. path thru GPS coordinates), showing them when they stray a little so they can correct? Not a control ...
0
votes
0answers
42 views

regulations - Is there a public ICAO roadmap when amendments taking effect

Is there anywhere a roadmap of ICAO when amendments taking effect? Or by any other European regulatory power?
1
vote
1answer
112 views

Did the airfoil choice on the P51D affect its maneuverability? [closed]

Did the wing design on the P51D, which used a laminar airfoil, affect its maneuverability? If so, how? To what extent?
8
votes
2answers
307 views

What are the failure mode(s) for flying cars in case of power loss?

There seem to be lots of plans (and even some working prototypes) for various autonomous flying cars and flying taxis. Most of these seem to be based on vertical take-off using some variety of an ...
1
vote
3answers
199 views

How long can a commercial airliner fly at 90deg roll?

For how long can a commercial airliner fly at a 90deg roll angle ? Or can it at all ?
0
votes
1answer
44 views

Difference between FMCF and AIMS on B777?

What is the Difference between Flight Management Computing Function and Airplane Information Management System on B777?
5
votes
0answers
185 views

Are tritium runway lights widespread in remote areas?

There was some interest in the 80s and 90s in providing runways in remote areas with tritium lighting (which requires no external power, since the radioactive decay in a sample of tritium gas induces ...
0
votes
1answer
38 views

How does turning Errors in the Air Driven Artificial Horizon work?

Turning through 90°, 180°, 270° & 360°, the error is different. I can understand what is turning error and pitch error individually. But why turning through different degree, the resulting error ...
0
votes
1answer
122 views

Where can I find complete aircraft blueprints for the purpose of study?

Where can I find aircraft blueprints for the purpose of study? I find that I learn a lot more when I am able to get the big picture of a machine that is used in real life (for example, to understand ...
3
votes
3answers
104 views

Would there be a purpose for a set of compressors in an electric turbo fan?

This is actually a two part question. Would there be a purpose to a compressor in an electric turbofan where there is no need for a combustion chamber, and if not, is there then a purpose for a bypass ...
0
votes
0answers
27 views

How can I determine the relative bearing to an NDB using the G1000?

For using an NDB, a pilot should know to MH+RB=MH. But I have never seen a relative bearing displayed in the G1000. Could you let me know where to see the relative bearing in the G1000?
22
votes
5answers
5k views

What exactly do “captain”, “pilot”, “co-pilot” and “first officer” mean?

I know the co-pilot sits beside the pilot. But it's not clear for me, who is the captain and who is the first officer? And where they are sitting during the flight? Who is in right seat and who is in ...
-2
votes
1answer
205 views

Is it legal to shoot down hijacked passenger aircraft in some countries? [closed]

Are there countries which post-9/11 have adopted legislation allowing the shoot-down of passenger aircraft under any circumstances ?
-5
votes
2answers
114 views

Why shoot down a passenger plane without knowing it will crash? [closed]

Flights threatened by a passenger and flights with lost coms and even flights in technical difficulty without criminal intent and not posing a security threat are sometimes intercepted and escorted by ...
0
votes
1answer
61 views

Where does it say that type certificates are required?

I am doing research and looking for a regulation (from FAA, Transport Canada, ICAO or anywhere else) that explicitly states that a type certificate is required for aeronautical products (aircraft, ...
1
vote
1answer
30 views

What are the specific side step minimums for an approach?

This question piques my curiosity a bit on this subject. In regards to circling approaches the AIM 5-4-19 states that a. ATC may authorize a standard instrument approach procedure which serves ...
-1
votes
1answer
30 views

Does MCP Altitude change in the B757/B767 when ALT HOLD is pushed?

I have a question, resulting of a discussion in a different forum: When flying the B757 or B767 and the ALT HOLD button is pushed, will that also change the MCP Altitude to the current altitude, at ...
1
vote
1answer
195 views

Boeing 737-MAX stabilizer control

Various websites have stated that during the 737-MAX crash in Indonesia, the pilots could not pitch up because of a faulty AOA sensor pitching plane down. Stabilizer has a rear fulcrum and front jack ...
0
votes
1answer
39 views

What causes the adverse pressure gradient that leads to flow separation?

When reading about flow separation I generally see a diagram like this: imp source: Wikimedia commons This shows that the boundary layer slows as it passes over the wing, eventually creating an ...
3
votes
2answers
67 views

What is a “sidestep landing” in an instrument approach?

I have never seen a sidestep landing on an approach plate. What is a sidestep landing and when I can chose this approach?
0
votes
3answers
87 views

How can I know DME distance? [closed]

When I fly 12000ft, how can I know a distance from DME station? Is there any formula to know or measure distance from DEM?
0
votes
1answer
84 views

What are the differences between the two main brace positions? [duplicate]

Why are there two different brace positions (pictured below) ? (If there is a difference between the official and true reason, please state both. In many planes the reduced seating spacing does not ...
4
votes
1answer
132 views

Has turbulence ever killed a passenger?

The question is on my mind, because many passengers think there is no need to wear the seatbelt when the seatbelt sign is not illuminated.
3
votes
1answer
97 views

How does retracting the gear affect weight and balance?

In many of the POHs, in the W&B section it is indicated that there is a moment change due to gear retraction. For example : Moment change due to gear retraction +780 in-lbs. Two questions : If I ...
4
votes
1answer
392 views

May airlines cancel unprofitable flights?

If a given flight is unprofitable for an airline (occupancy ratio or – more precisely – revenue from ticket fares and cargo below the break even point) and if operating this flight incurred a bigger ...
2
votes
2answers
114 views

Why are waypoints not named uniquely?

Waypoint names are not unique. Why ? This is unnecessary (it would be possible to use unique names only). It introduces potential for confusion. So why are duplicate waypoint names permissible and ...
0
votes
1answer
98 views

What is an “unsafe airline”? [closed]

Question: Is there any internationally accepted definition for what an "unsafe airline" is based on objective criteria (e.g. fatalities per million passengers) ? Or is there an international standard ...
-1
votes
1answer
62 views

How to understand turbo machines?(compressors,fans,pumps,turbines,etc..)

From what I understood, the energy transfer between the blades and the fluid(fluid to blade or blade to fluid) occurs due to the curvature of the blade.Its because of this curvature the stream of the ...
0
votes
1answer
176 views

How to increase your chances of survival in a plane crash? [closed]

More than 90% of plane crashes in recent years had survivors. In America, for example, there were 568 plane crashes between 1983 - 2000: Out of the collective 53487 people onboard, 51207 ...
4
votes
1answer
592 views

Can anyone identify this jet?

I took the picture in 2011 at McCarran.
-2
votes
0answers
111 views

Which rules are applied If a passenger wants to get off from LHO (live human organ) carrying aircraft, during taxi? [migrated]

Which rules are applied If a passenger wants to get off from LHO (live human organ) carrying aircraft, during taxi? Is the passenger get off from aircraft? Or Is priority given to LHO? Is there an ...
0
votes
0answers
22 views

Where can I find airfoil data for the Beechcraft 1900D tail?

I am creating a CAD model of Beechcraft 1900D from images for a project. So far most info is available in http://www.users.on.net/~grypen/b1900d.html except the airfoil used by the tails. I have ...
4
votes
2answers
155 views

Why the Antonov AN-225 has negative dihedral wings combined with a positive dihedral horizontal stabilizer?

I know the reason why it has negative dihedral wings, but I do not really know why it is combined with a positive dihedral horizontal stabilzer, which are the benefits this configuration provides?
1
vote
2answers
138 views

What is the correct phraseology to request a climb?

If you'd like to request a climb to a higher flight level while cruising, which do you think is a more proper way to request it: Request to climb FL350 Request climb FL350 I know they have zero ...
5
votes
1answer
205 views

What is this twin engined jet?

I was barely able to get a shot of this plane so it's not great quality. I was hoping someone could identify it for me. I've never seen one like this.

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