All Questions

9
votes
0answers
132 views

How does an eILS improve throughput (for the A380)?

While researching where Heathrow's MLS approachs had gone, the only thing I could find is a topic on Heathrow's new eILS (enhanced ILS). As of the topic's date (Aug 2015) it seems eILS is only ...
9
votes
0answers
153 views

Why is the weather radar mounted on the left wing of the TBM?

Weather radar is mounted starboard on the Pilatus PC12 or in the Piper Meridian/M600/M500. It adds drag to the right wing, thus a right yawing moment, and helps to counteract the slipstream effect ...
9
votes
0answers
305 views

Denver International Airport pneumatic tube systems

Wikipedia says: Denver International Airport uses many pneumatic tube systems, including a 25 cm diameter system for moving aircraft parts to remote concourses, a 10 cm system for United Airlines ...
8
votes
0answers
160 views

Who decided that the Boeing 737 MAX planes that were airborne when the grounding was issued cannot enter and land in EU air space?

On March 12th, 2019, EASA grounded the Boeing 737 MAX series by publishing their Emergency Airworthiness Directive 2019-0051-E (AD): Effective Date: 12 March 2019, 19:00 UTC  [...] ...
8
votes
0answers
268 views

When were the last subsonic turbojet-powered airliners retired from commercial passenger service?

The very first jetliners (Comet, Tu-104, Caravelle I-VI, 707-120/-220/-320, DC-8 series 10-30, original 720, CV-880) all used turbojet engines, turbofans not being available until later; when ...
7
votes
0answers
126 views

How are businesses able to use experimental aircraft?

I saw businesses like this using military jets to sell rides to civilians. Since warbirds are considered experimental aircraft, does the FAA issue special certs to fly them commercially? According ...
7
votes
0answers
2k views

How can this ACARS message be decoded?

With regards to the text below, can someone offer either advice or a link to a website/document that would help decode ACARS messages. I am ok with the following: QU - ACARS "to" address Q - ACARS ...
6
votes
0answers
395 views

Can anyone identify what/where this photo is of?

This is a photo by the Real Photograph Co. (Liverpool) No.684. I think it may be a crashed WW1 Biplane (lots of the photos with it were WW1 biplanes).
6
votes
0answers
59 views

Why are some US STAR fixes/waypoints included in FAA's legacy files but not in FAA's published STAR procedures?

I have noticed that some US STAR procedures include (slightly) different number of waypoints, depending on which source material is consulted. Take for example the CAMRN4 STAR and its corresponding ...
6
votes
0answers
303 views

Can the RAM AIR valve cause depressurization on the CRJ-900?

On the CRJ-900 AIR-CONDITIONING panel there is a RAM AIR switch light which opens a valve and allows air from the ram air scoop to enter the mixing manifold for distribution to both the flight deck ...
6
votes
0answers
66 views

How is a 14 CFR 101 sUAS NOTAM filed for an unregistered aircraft?

FAA promotes the utilization of NOTAMs to announce sUAS operations, and requires it in 333 exemptions and some 107 waivers. However, sUAS (drones / model aircraft) under 14 CFR 101 have been ...
6
votes
0answers
172 views

Are there any future regulations planned for electric multi-motor LSAs?

It seems with electric control of the multi engine configuration, such as with NASA's new leap tech technology, that there should be a way to use multiple motors in the LSA category. Is there anything ...
5
votes
0answers
60 views

Which airspace requires what RNP?

How do I know which airspace requires what RNP value? More specifically, can I go from NY to London with just BRNAV providing I stay above the NAT HLA?
5
votes
0answers
172 views

How can I switch off the yaw damper in an Airbus A350?

How can I switch off the yaw damper in an Airbus A350? In the A320, this can be done by switching off the FAC, but the A350 doesn't have a FAC switch; it has prim and sec instead of FAC and ELAC.
5
votes
0answers
159 views

How does the Pseudo-Satelite Zephyr land?

I don't see how the Airbus Pseudo-Satelite Zephyr solar plane can land safely. It this video, it is "thrown" to take off, but no gear or something similar is visible. Will it just land on its belly? ...
5
votes
0answers
221 views

How can I convert a frozen ATPL from South Africa to an Iranian one?

I have got a frozen ATPL license from South Africa and I'm from Iran. I came back home last year and I have converted my CPL/IR license to the Iranian piloting license by doing Air Law and Human ...
5
votes
0answers
98 views

What is the maximum allowed intensity for light beams pointing at the sky for non-aviation purposes?

In Hong Kong, I'm designing a show with light beams and i'm thinking using Robe Megapointe lights (https://www.robe.cz/megapointe/). I've been ask by the client to follow the aviation regulation. ...
5
votes
0answers
138 views

Can be the divergence Mach be greater than 1?

I am wondering if this is possible. I know that by decreasing t/c and increasing the sweep angle it is possible to increase the divergence Mach. Where is the limit? I am calculating the Mach for a ...
5
votes
0answers
136 views

Who is this flyer seen in Oakland c. 1929?

Looking for identification of the man on the left. Second from left is W.A. "Sandy" Sanders, third is Denny Wright, and fourth is Clyde Sunderland. Oakland, around 1929.
5
votes
0answers
111 views

What uses for flight did early aviation pioneers envision?

Between 1903 and 1914, what did the aviation pioneers think flight would be used for, besides military purposes? Did they envision anything like crop dusting, commercial transportation, charting ...
5
votes
0answers
149 views

What is Lower Traffic Area (LTA) airspace in France?

In France, AIP ENR-2.1 subsection 2.1.2 defines airspaces of type CTA (control area), UTA (upper traffic area) and LTA (lower traffic area). I'm not familiar with LTA which appears not to exist ...
5
votes
0answers
498 views

When do the Boeing 737 Next Generation aircraft reach End-of-life?

When can we expect the Boeing 737 Next Generation aircraft to reach End-of-life / stop flying? The Next Generation is the name given to the −600/-700/-800/-900 series of the Boeing 737 airliner.
5
votes
0answers
147 views

Who was the first flight test engineer?

The discipline of Flight Test Engineering has existed since at least 1903, but when did engineers identify their work, distinguish their work from other disciplines, under terms that would mark it as ...
5
votes
0answers
574 views

What is the maximum weight on the main gear of a large aircraft at rotation and touchdown?

For a large aircraft like a B747 or A380, how much does the weight on the main gear increase when the nose gear is in the air? I mean, in these two cases: What is the maximum extra weight on the main ...
5
votes
0answers
116 views

Where can I find a worldwide General Aviation incident/accident ocurrence reports database?

I enjoy reading reports about aviation incidents and accidents. There are often interesting technical details and I believe that this practice increases the safety of my flights. To keep up to date I ...
5
votes
0answers
363 views

What is the effect of Mach number on efficiency, thrust and specific fuel consumption of a ramjet engine?

My graphs show that overall efficiency and thrust first increase, reach a peak and then fall in the supersonic range (M=1-5) whereas SFC first and then increases rapidly near M 5. Why does this ...
5
votes
0answers
185 views

What drives the design decision of where to place the refueling receptacle?

What has driven the decision to place the refueling receptacle behind the pilot and to rear of the plane. Is this simply driven by the change away from drogue and probe and the location decided by ...
5
votes
0answers
134 views

What are the fatigue regulations in the US and Australia for military transport helicopters/rotorcraft?

For transport category military helicopters, what are the fatigue regulations as specified by the US and Australian regulatory bodies? I've managed to find that FAA has FAR 29.571 (US) but this ...
5
votes
0answers
314 views

What are the popular algorithms or softwares used in identifying or track flights by ATC?

Just curious to know about the algorithms /software used by ATC for tracking flights in real time.Can it be classified under ERP ?If no under which category does that fall ?
5
votes
0answers
133 views

What additional considerations do pilots have when deviating from the planned routing on flights dispatched under Method 2?

This article about Method 1 and Method 2 gives a brief explanation of Methods 1 and 2 in terms of dispatching flights under 14 CFR 121. Here's an excerpt. FAR 121.191 requires that we dispatch our ...
5
votes
0answers
279 views

Which US airport has the lowest circling MDH?

As I recently contemplated 14 CFR 135.223 and its implications, I began wondering about airports with exceptionally low circling minima. For a little context and background, the part of §135.223 that ...
5
votes
0answers
273 views

What was the Trim Problem on the Brabazon's First Flight?

In this video, starting at 18:15, the copilot on the Bristol Brabazon's first flight recounts that the aircraft became airborne a little sooner than its pilots expected, and that despite the captain ...
5
votes
0answers
168 views

Why is the flow ahead of a shock wave chaotic?

Here is the image of a shock wave on a cone in a small supersonic wind tunnel, the white lines are the condensations formed in the test chamber due to flow expansion. Why are the condensations so ...
5
votes
0answers
172 views

How is the required motor power calculated for a quadcopter?

I've been trying to find the required motor power for a quadcopter. I first calculated drag power and then I made a linear trend line for motor power against motor weight. I made the motor power 1.5 ...
5
votes
0answers
343 views

Who must approve a globally distributed satellite to ground laser communication system?

Laser Light Communications (US) plan for several dozen optical high speed data links between satellites and ground is described in Aviation Week's article Big Gains On Horizon For Laser Communications ...
5
votes
0answers
135 views

How are “charter” and “passenger” flights defined in the AIDX standard?

I'd like to know the difference between these flight types in the IATA AIDX standard; specifically, for use in fuel order notifications.
5
votes
0answers
493 views

If an aircraft does not have an FDR, must one be installed to comply with Flight Data Monitoring requirements in EASA countries?

Flight Data Monitoring (FDM), which analyzes FDR data to accomplish things like ensuring that pilots are following SOP's, is a requirement for EASA's Third Country Operators (TCO) certification, ...
5
votes
0answers
226 views

Why were the TWA TriStar middle seats smaller than the aisle seats?

I was watching an old TWA advert and a question came up: why were the L-1011 TriStar middle seats smaller than the aisle seats?
5
votes
0answers
408 views

What is the best combination of airfoil shape for flight in ground effect over water?

What is the best airfoil shape for flight in ground effect over water?
5
votes
0answers
194 views

What is the purpose of sum voltage monitor?

I was looking at the design diagram of actuators. Every channel of the actuator is connected to a voltage differential transducer. The transducer outputs are fed to a sum voltage monitor. I could not ...
5
votes
0answers
168 views

Why is this G-AIRMET's valid time earlier than its issued time?

For this G-AIRMET map, why is the valid time earlier than the time it was issued?
5
votes
0answers
462 views

What is the current state of regulation regarding VTOL aircraft in the LSA category?

With quite a few concept designs in progress, I am curious what the current FAA regulations are regarding vertical takeoff and landing vehicles in the light sport aircraft category.
4
votes
0answers
111 views

Has any jurisdiction mandated passenger training?

A chunk of pre-departure time for each flight is dedicated to a safety briefing for passengers that few passengers seem to pay attention to. In the aftermath of accidents, it has been revealed at ...
4
votes
0answers
107 views

If all control surfaces were disabled, could a passenger plane be controlled by distribution of the passengers?

Let's assume that a large military plane has its control surfaces disabled in combat. The engine(s) can still be controlled. There is a substantial number of ground forces being transported. In ...
4
votes
0answers
43 views

Does an autopilot that controls roll, pitch and a yaw damper meet the requirements of 135.105(c)(1)?

For single-pilot VFR operations, 14 CFR 135.105(c)(1) requires that: The autopilot is capable of operating the aircraft controls to maintain flight and maneuver it about the three axes Does this ...
4
votes
0answers
95 views

What are the helicopter frequencies on the LA heli charts used for?

The LA heli charts list frequencies for the different heli routes in LA: Are the frequencies used as a "CTAF" for helicopters, or is there an air traffic controller on that frequency telling ...
4
votes
0answers
34 views

Temperature Indicator in Manned Balloon

14CFR31.85 ("Required Basic Equipment" for manned free-air balloons) requires an Envelope Temperature Indicator (ETI). This is a requirement of the FAA. Not necessarily the manufacturer. Some balloon ...
4
votes
0answers
76 views

Is there any book like the “Stick and Rudder” about the helicopter?

I have read the Stick and Rudder, that's really a classic book. Now I want to study the flight theory about helicopters, is there any book like this?
4
votes
0answers
161 views

What is the longest time after which plane crash survivors were rescued?

I found: Aviator Bob Gauchie detains the record for solo arctic survival by a downed airman, enduring 58 days of arctic weather before his rescue in Canada 1967. After 72 days on the glacier, 16 of ...
4
votes
0answers
105 views

Which individual aircraft has carried the most passengers in its lifetime?

I'm guessing that the aircraft will be one of the 747s that service the domestic Japanese market, making regular short hops full of passengers - but perhaps actual figures exist to confirm this. See ...

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