All Questions

11
votes
0answers
207 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 ...
10
votes
0answers
182 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 ...
7
votes
0answers
182 views

What is the correct IATA airplane designator for the Boeing 787-10?

Wikipedia claims 781, most other sources say 78J. I can't find anything authoritative, and IATA has the gall to want US$578 for ...
7
votes
0answers
66 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 ...
7
votes
0answers
72 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
452 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
326 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 ...
6
votes
0answers
179 views

Can the divergence Mach be greater than 1?

I know that by decreasing t/c and increasing the sweep angle it is possible to increase the divergence Mach, but what is the limit? I am calculating the Mach for a wing with a quarter chord sweep ...
6
votes
0answers
151 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.
6
votes
0answers
128 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 ...
6
votes
0answers
182 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 ...
6
votes
0answers
179 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 ...
6
votes
0answers
429 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 ...
6
votes
0answers
203 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 ...
6
votes
0answers
288 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 ...
6
votes
0answers
180 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 ...
6
votes
0answers
145 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.
6
votes
0answers
260 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?
6
votes
0answers
179 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
76 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
212 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 ...
5
votes
0answers
189 views

Why does having a geometry-limited aircraft lead to lower VLOFs?

For this question, please have in mind these excerpts from the 14 CFR 25.107 - Takeoff speeds. "(d) VMU is the calibrated airspeed at and above which the airplane can safely lift off the ground, ...
5
votes
0answers
147 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
181 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
347 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
172 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
471 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
64 views

Does/Can combustion instabilities occur in SCRAM jet?

I was told that combustion occurs at Supersonic speeds in SCRAM jet. So acoustic disturbances/ pressure fluctuations can't travel into incoming jet stream. Does this avoids combustion instabilities in ...
4
votes
0answers
74 views

What operational aspects of Alphabet's Wing drone delivery service will be the same as that of an airline?

The NPR News article and podcast FAA Certifies Google's Wing Drone Delivery Company To Operate As An Airline begins with: The Federal Aviation Administration has certified Alphabet's Wing Aviation ...
4
votes
0answers
98 views

Aerospike nose cones for supersonic jets?

Not to be confused with aerospike nozzles. This is about the big pin-like rod in front of ICBM nose cones. This answer (from Space) about aerospike nose cones notes that one of the potential ...
4
votes
0answers
99 views

Is In-Seat Rest used regularly where it is legal, and is it restricted by airline SOPs?

This answer says that a pilot who is not flying (PNF) can make use of a procedure called In-Seat Rest to take a nap during flight. A comment on the same answer says that this is illegal in the US, ...
4
votes
0answers
129 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
120 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
69 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
126 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
176 views

NOTAM - What means “no shoulders along taxiways” in German?

can anyone explain to me what "no shoulders along taxiways" means? I know what shoulder markings are, but I don't know how to translate them. Are there German people? :) Thank you!
4
votes
0answers
36 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
85 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
123 views

In a flight plan, does it make any difference to write an increase of the flight level instead of writing a cruise climb?

According to ICAO 4444, a change of speed or level should be written in item 15 of the flight plan according to these rules: Change of speed or level (maximum 21 characters) The point at which a ...
4
votes
0answers
110 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 ...
4
votes
0answers
81 views

Where can I find an image of the Thales FMS220 RMS page?

I'm looking for photo/color image showing Thales FMS220 RMS (Radio Management System) page. Also COMMUNICATION and XPDR pages are highly welcome.
4
votes
0answers
81 views

Ground Power KVA when on stand

How much power from a GPU would a jet, say a Boeing 737, require when boarding passengers or just sat idle on the air bridge? I’m guessing the Aircraft would only consume the full 90kVA ground power ...
4
votes
0answers
273 views

What will happen to a modern high bypass engine at 80 000 feet with cruise speed of 0.8 Mach?

While keeping the typical cruise speed of 0.8 Mach, will the engine shut down due to "air starvation" at such high altitude? Is it possible to design a turbofan engine, which is able to provide thrust,...
4
votes
0answers
121 views

What is the current state of the practice regarding surveillance and surveillance data integrity?

I am experiencing difficulties in finding out exactly how air traffic surveillance works in practice, and more specifically what is done to verify the integrity of surveillance data. ADS-B and other ...
4
votes
0answers
172 views

Identify this Chicago aircraft incident involving loss of control

Many years ago I listened to an ATC tape of an aviation incident involving a commercial aircraft that had some type of control loss, I think in Chicago. After several attempts to set up for an ...
4
votes
0answers
274 views

How are the Tupolev Tu-95's blades shaped?

The Tupolev Tu-95 "Bear" seems like an awfully cool piece of innovation with its unusual contra-rotating supersonic-tipped props. From what I've been reading it sounds like it's been the only mass ...
4
votes
0answers
153 views

In terms of noise, how does a steep climb-out compare to a noise abatement procedure?

For airports in populated areas, it is common to implement noise abatement procedures. In practice, this means that aircraft reduce thrust on departure, so that noise is reduced in proximity to the ...
4
votes
0answers
121 views

What is black routing and red routing?

In a meeting with aviation experts, the terms black routing and red routing were discussed. What are they? From the discussions I was able to put together that either the TMU (Traffic Management Unit) ...
4
votes
0answers
260 views

Why is “LINING UP” used as the proper response to a “conditional” line-up instruction?

This is a list of the ICAO's standard phraseologies used for preparation for takeoff. I don't understand why "lining up" is (recommended to be) used as a response to a conditional line-up instruction. ...
4
votes
0answers
68 views

Climb/Descent or vectoring in other controller's airspace without point out

I'm an ATC trainee in an ACC. Few days ago, I handed off an aircraft to the adjacent approach control, and the app. controller made it descend and vectored while it was still in our airspace; ACC's ...

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