All Questions

11
votes
1answer
1k views

What is this tube in a jet engine's air intake?

I have long been wondering what is the official name of this little air intake tube located in front of the fan blades and its intended functions. I did search it on google but it was in vain. I guess ...
4
votes
4answers
465 views

Could a C-130 Hercules be built using WW2 technology?

I'm looking at this as a "time traveller carrying only designs in his head" scenario. Obviously turboprop engines are out of the question, but how close in capability would it be possible to get a C-...
5
votes
2answers
272 views

Why is the Beluga chartered out for oddball missions, but not the Dreamlifter?

Both Airbus and Boeing have special outsize-cargo freighters for transporting large pieces of airliner; Airbus has five Belugas (derived from the A300), while Boeing uses four Dreamlifters (...
2
votes
2answers
141 views

Why don't short-haul regional jets go for composites?

We have seen Airbus and Boeing going all the way for composites on their A350 and 787, but when it comes to smaller planes like the Embraer E-jets or the Bombardier C-series, they choose to use ...
4
votes
1answer
107 views

Why is the TORA of 27R not the same as the TORA of 09L?

09L and 27R are the same runway but just in opposite directions. I've drawn out a diagram and for some reason the TORA for 27R is 18m less? Where has that 18m disappeared? I've been trying to work out ...
6
votes
2answers
509 views

How do preceding aircraft affect the ILS signals?

(airliners.net) Planes on approach in sequence to London Heathrow. When LVP is in effect, the ILS area is protected. I'm wondering, when there is a queue to a runway, how does the long queue affect ...
3
votes
1answer
202 views

How do I get an FAA okay for a private runway?

The county I'd like to put a private runway (for my use only) in doesn't require any special permits because the property is zoned Agricultural, BUT they do require some form of acknowledgement from ...
3
votes
1answer
68 views

Is the “PROB” in a TAF only applying to the next group or all following ones?

Let's assume I have a TAF that reads: [...] PROB40 TEMPO 0815/0822 5000 -SHSN BKN008 OVC015 TEMPO 0822/0909 1000 SN VV003 BECMG 0902/0904 16012KT Which of the <...
1
vote
0answers
15 views

What is RNP and ANP in area navigation [duplicate]

RNAV often comes with RNP and ANP . I can't understand what they indicate ? Even in boeing 737 at the bottom of Navigation display RNP ANP are shown and this changes place to place . Please tell me ...
1
vote
1answer
65 views

How can I recognize Taylorcraft BCS-12D-4-85?

I'm perfecting my logbook and can't name the subtype of the aircraft I've flown. Some directories says it was built in 1946 and is a BCS-12D on floats. Others say it is a BCS-12D-4-85 which according ...
2
votes
1answer
46 views

Where can I find the latest METAR and TAF for RPVK / Kalibo International Airport?

What website holds the latest METAR and TAF for RPVK / Philippine weather? In aviation weather the information does not exist at all times. Could you suggest an other website that provides the ...
9
votes
1answer
332 views

Why do the CRJ700 window shades open in different directions?

On a CRJ700, the window shades in the rows immediately fore and aft of the exit doors open downward. All the rest open upward. Seen on more than one aircraft. Is there an engineering rationale for ...
1
vote
1answer
213 views

Was the 1992 Gimli DHC-4 Caribou accident ever investigated?

On August 27, 1992, 3 people were killed when a de Havilland Canada DHC-4 Caribou crashed immediately after takeoff at Gimli Industrial Park Airport. Wikipedia describes the accident as follows: ...
2
votes
1answer
218 views

How fast do four Tire-Propellers have to rotate to lift 2000 lbs? [closed]

I just saw this come out, Goodyear's Tire-Propeller Concept – a combination tire that can also act as propeller (well, more like a ducted fan I guess). There's a neat video that goes with it, ...
0
votes
0answers
70 views

What are the reasons for not wearing polarized glasses during flying, if glass cockpit and polarized windshield aren't an issue? [duplicate]

So far the only reasons I can find are the newer planes come with polarized windshields that goes dark when you wear polarized glasses and the fact that glass cockpits become dark. But is there a ...
2
votes
1answer
72 views

What is the meaning of R88/70D in this METAR from Ashgabat International airport?

The following METAR is from Ashgabat airport (UTAA) UTAA 071300Z 13006KT 9999 FEW050CB BKN050 BKN100 15/06 Q1013 R88/70D NOSIG What does R88/70D mean, I couldn't find any references?
2
votes
1answer
241 views

Why was Air India flight AI101 diverted to SHJ 5 times in the past few days?

Air India flight AI101 using a 777-300ER on multiple westbound and eastbound routes was diverted to SHJ airport in Sharjah, UAE. I am curious if there is a specific reason. It cannot be a coincidence ...
10
votes
2answers
519 views

How is the camera positioned for these plane-to-plane Schlieren images of shock waves?

These two popular press articles discuss the use of schlieren photography to image shock waves of jets during flight using a special schlieren camera on a third plane. Gizmodo: NASA Captures First-...
2
votes
2answers
82 views

What is the difference between RTK GPS and GBAS?

My understanding is that real-time kinematic (RTK) is also a differential GPS technology to enhance accuracy by using a ground-based station to provide the correction data to the onboard GPS receiver. ...
0
votes
2answers
144 views

What landing aid system are used for fixed wing UAV?

For commercial aircraft, precise landing aid systems (ILS, GBAS) are required for autolanding, but these navigation systems are too expensive to be used for UAV operations. However, a lot of UAV OEMs ...
0
votes
0answers
41 views

Why are airline seat belts lap-only? [duplicate]

On the flight that I was on today, one of the passengers near me asked this question. Why don’t airplanes use lap- and shoulder belts like cars do?
1
vote
2answers
171 views

Why don't aircraft carriers have multiple sets of arresting wires?

On this answer to this question regarding the merits of angled flightdecks on aircraft carriers, @JanHudec makes this interesting observation: You don't really have "two flight decks". The ...
2
votes
2answers
274 views

How is the A-10 effective against tanks?

Perhaps this isn't on-topic, but is the A-10 effective against tanks (tank armour)? For example, this page claims: Using the cannon, the A-10 is capable of disabling a main battle tank from a ...
2
votes
1answer
126 views

What effect does the angle of attack have on lift and drag?

In general, what effect does the angle of attack have on lift and drag? I understand the the B-25 take-off run was normally in excess of 1500 ft, the exact value dependent upon load, density altitude,...
1
vote
1answer
63 views

What's the difference between a Terminal Control Area and a Control Zone?

From what I've understood, in Canada a Terminal Control Area (TCA) is established at airports with a high volume of traffic to provide IFR control service to arriving, departing and en route aircraft. ...
2
votes
2answers
91 views

How to interpret/use “Fix Minimums” (at KALB)

This one stumped both myself and my CFI. Im specifically asking about the minimums at KALB IL/LOC 19 but a general answer is also appreciated. The plate lists two distinct sets of minimums and we ...
0
votes
0answers
17 views

Is some sweep beneficial with taper?

I'm developing a canard glider which requires some taper for the canard to stall first. I understand that sweep is typically only for aircraft in a compressible airflow (M >= 0.3), but is there any ...
0
votes
1answer
61 views

What requirements aren't met, that would designate an airspace to be Class E instead of A, B, C, or D?

Quoted from Transport Canada "Class E airspace is designated where an operational need exists for controlled airspace but does not meet the requirements for Class A, B, C, or D." Class A airspace ...
-2
votes
3answers
194 views

Why Buy A C182/172 Instead Of An C180/170? [closed]

So a thought came to my mind which covers not only Cessna planes but all others. The Taildraggers need a little bit less runway becayse AOA on takeoff is good and that AOA eliminates the need of ...
0
votes
1answer
49 views

Calculation QNE and QNH, with flight level and QNH set lower (higher) than QNE

Hi Student pilot here. Lets say Mr pilot is flying at FL75 and QNH is set at 995 hpa, however there is a mountain in the way at 7000', will he below or above the mountain? If you could visually ...
0
votes
0answers
35 views

I want to find out more about Raab Schwalbe Reg SX-AAG

According to the records on the web, Raab Schwalbe 11 reg SX-AAG was built in Greece in 1935 and sold abroad in 1937. I know that it was destroyed in a crash on landing in Palestine but I am not ...
1
vote
2answers
128 views

Are Crew Resource Management (CRM) and other Human Factors methods effective?

I help in giving human factor training in both the start up phase and in the biennial continuous training. I am a bit tired of my students...especially those in aviation long term, being disillusioned ...
0
votes
0answers
57 views

What are the effective span and lifting properties of a circular wing?

Today I read an article on FlightGlobal about the Bell air taxi demonstrator. It includes some paraphrased quotes from the Bell VP of innovation, Scott Drennan, among which the following stood out: ...
1
vote
1answer
152 views

What causes the nose landing gear knocking noise on a Boeing 777 while taxiing?

The NLG knocking noise heard on taxi-in to stand, what could cause this knocking noise?
0
votes
4answers
259 views

Why don't flight attendants get tired when passengers can, despite sleeping?

This Reddit thread refers to "stressors of flight" (many of these stressors are also present in automobiles), sudden altitude adjustment, lower cabin humidity., proximity to strangers. Yet flight ...
2
votes
1answer
87 views

Why does transonic drag happen?

I have heard of transonic speed and it is between supersonic and not supersonic. What is it and why does it happen to aircraft and how does it produce a lot of drag. How do you prevent it from ...
4
votes
5answers
182 views

Why does elevator still raise and lower the nose when the aircraft is steeply banked?

In a steep turn, the aircraft is basically sideways. However, when executing a steep turn, one still raises and lowers the nose of the aircraft by using the elevator. Intuitively, it seems to be ...
0
votes
2answers
131 views

Did the Doolittle raid run their engines over square?

My flight instructor made a comment when talking about complex airplanes that "never over-square an engine" is a good rule of thumb but secondary to POH instructions. The POH, (I presume) is the best-...
19
votes
4answers
8k views

Why are special aircraft used for the carriers in the United States Navy?

Why are aircraft such as the legacy F-14 and now the F/A-18 used by the US Navy carriers? It seems to me that developing a new aircraft from the ground up is very expensive. Is it not possible to ...
9
votes
5answers
2k views

What is the difference between a forward slip and a side slip?

I am having a hard time understanding what differentiates the two types of slip. I understand that in a forward slip, the longitudinal axis is tilted with respect to the flight path, whereas in a side ...
2
votes
1answer
320 views

What is this aircraft that has flown over my house all day? [duplicate]

I mainly joined to ask this question. I would not have been so curious had it not flown directly over my house at least 5 times in about a half-hour. Every time my house started rumbling, I’d rush ...
3
votes
1answer
243 views

As a commercial pilot, can I fly my spouse for her work?

So I hold a commercial license and have a 2nd class medical. My wife is an engineer and a product she works on needs to be altitude tested (unrelated to aviation). She was suggesting that we could ...
2
votes
2answers
33 views

Is mode C required for CVFR in Canadian Class B airspace?

(This is in reference to Canadian Airspace) Can you fly in Class B airspace under CVFR (Controlled Visual Flight Rules) without a transponder with Mode c (altitude encoding) capability? To enter ...
3
votes
2answers
228 views

Does altitude influence the flight range of an engine driven aircraft?

I'm reading a chapter about flight performance during the cruise phase and the influence of altitude. My book (Aerodynamica, prestatieleer en vliegtuigtechniek by Bas Vrijhof on page 155, written in ...
1
vote
1answer
57 views

Are there any certification requirements for steering bypass or lock pins?

Are there any requirements for aircraft bypass and/or lock pins? Do they have to be somehow certified by local or international aviation authorities?
0
votes
1answer
154 views

Why does the DHC-6 have only one set of elevator cables?

Air Moorea Flight 1121 crashed because its up-elevator cable broke, allowing the elevator to blow to its faired position and thus be unavailable to counteract the pitch-down moment caused by the flaps ...
0
votes
1answer
109 views

Why does the DHC-6 pitch down when the flaps are retracted, rather than up?

Air Moorea Flight 1121 crashed because one of its elevator cables broke immediately after the pilot retracted the flaps, but before he could trim out the resulting pitch-down moment - to quote the ...
11
votes
6answers
5k views

What are all the squawk codes?

I love aviation and I love learning new things about it. I was wondering if anyone knew all of the squawk codes and in particular what squawk 7500 means.
0
votes
1answer
98 views

Are 100 hour inspections required to rent out a plane?

According to 14 CFR § 91.409 - Inspections: (b) Except as provided in paragraph (c) of this section, no person may operate an aircraft carrying any person (other than a crewmember) for hire, and no ...
0
votes
1answer
151 views

In-game Air Traffic Control questions [closed]

I have been making an AI ATC for a game I have been writing. The channel is mostly dead air but occasionally you can hear some chatter: http://reskin.us:8081/stream I am a former airline pilot and a ...

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