# All Questions

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### IAS to TAS E6b giving me wrong answer

I am trying to work out TAS from IAS, having problems with it on MSFS. the problem is as follows: 23000 FEET / 0 WIND / -19F (-28C) / IAS 304Knts / TAS (MSFS CORRECT) 426Knts / TAS (VIA E6b Calculator)...
15 views

### When word aerodynamics first used?

Aerodynamics comes from greek words aer (air) and dinamike (dynamics). In this link write " The word “aerodynamics” itself was not officially documented until 1837"(I dont know is it correct ...
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30 views

### Why do shocks travel further down the wing as the Mach number increases?

Inspired by this question, why do shocks move further back on a wing as the Mach number increases? Normal shocks on the surfaces of wings form when the air molecules of the pressure recovery area on ...
• 2,089
67 views

### Are interlocked "traffic signals" possible/in use for taxiing?

I am a frequent viewer of the Youtube channel VASAviation which shows various interesting incidents regarding ATC. Recently there were two similar videos (first and second) where ATC directed a plane ...
64 views

### Why does F-18 have low wing sweep?

Compared to most other fighters, the f-18 has a low sweep angle on its wing; 20 degrees compared to the f-16s 40 degree sweep and f-15s 45 degree sweep. Additionally the wing has a relatively high ...
43 views

### Does oscillation occur in the pitch axis of a plane?

If you a small GA plane, and apply full rudder to one side and then let go, there will be some oscillation from the momentum of the rotation about the yaw axis. Does this same effect happen with the ...
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1 vote
106 views

### Is it a good idea to increase exhaust duct length?

I am a big newbie in aviation but still, I have a question: Let's assume a civil aircraft (Boeing 737 or Airbus 320), flying with those impossible real life hypothesis: the exact SAME turbofan are ...
47 views

### Do the Aircade minigames enroll you into the US military(im from Romania and those minigames look interesting but no interest to enroll whatsoever [closed]

Mini games examples in photo(moderators this is not opinion based)
42 views

### What does DRMS OTS mean in a notam

MULTIPLE DRMS OTS ON RWY 34R/16L. 9/3 EAST/WEST SIDE. 8/4 EAST SIDE. 6/6 EAST/WEST SIDE. 1/11 EAST SIDE. 18 APR 22:01 2024 UNTIL 31 MAY 23:59 2024. CREATED: 18 APR 22:01 2024 I have looked everywhere ...
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223 views

### Jet Fuel Flammability

Presently a fueled passenger jet is a flying bomb. Is there any hope in the near future of chemically reducing the flammability of jet fuel on impact?
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94 views

### What's the meaning of these jet fighter pilots gestures?

As per title, what's the meaning of the following gestures (if any)?
37 views

### Why do airlines sell some multistop route tickets cheaper? [closed]

After searching for a flight from SAV to CLT, I get a price of $256 from AmericanAirlines. If I do another search from SAV to ORF (which has a stop in CLT) the price drops more than half to$107. Why?...
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656 views

### What temperature is the vapor that forms around a maneuvering aircraft?

At what temperature does the vapor seen on aircraft maneuvering form? I know this highly depends on humidity, but is there a general calculation? When doing my research, I found this page, but it ...
• 2,089
31 views

### Altitude hold controller for Boeing 747-400 [closed]

The picture below, depicting the control system I try to implement as octave m-file is fig. 3 from (1). The various elevator transfer functions, equations 9 through 11 of the report, can be found in ...
44 views

### What was the fastest single engine plane with predominantly wood frame and fabric skin construction?

I've been doing some research and I haven't found a satisfying answer. The Mosquito was quite fast but it was wood skinned and had two engines. The Bellanca Viking was fabric skinned but used a metal ...
936 views

### How to decode this Notam?

I've a difficulty to use the Notam decoder on this Notam. ...
• 311
2k views

### How do you stay stable when landing / taking off an F-35 during a VTOL landing/takeoff?

I saw a video of a F-35 landing vertically using its fans and was curious as to how they do that without a tail rotor? Why don't they spin out like a helicopter does when it loses its tail?
2k views

### ID a 1930's-40's aircraft

This cribbage board is a mystery I am trying to solve. It has an aircraft flanked by linked flags - they look like the Union Jack and the former Canadian Flag - and a maple leaf. It suggests that ...
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1 vote
132 views

### Does Boeing and Airbus perform extensive safety inspections and/or stress tests on each other's aircrafts? [duplicate]

I am wondering if it has been a common practice within the commercial airline industry for an aircraft manufacturer to purchase a brand new aircraft model built by their competitor and to then perform ...
159 views

### Do helicopters have to pay landing fee?

Is there a landing fee for helicopters? I ask because since they usually don't use the runway hence doesn't cause maintenance costs for the airport I would imagine they have at least a different fee ...
• 2,799
1 vote
40 views

### MULTI LAYER INSULATION [closed]

I've been learning about MLI blankets for spacecrafts. I'm trying to figure out how to estimate the number of MLI layers that will be required at a particular orbit. The temperature range is from 300K ...
120 views

### Is a stream of air / jet exhaust low pressure?

Inspired by this answer, is a moving stream of air (Jet exhaust, rocket plume, etc) low pressure? I’ve always thought that a higher pressure area (say the combustion chamber of a rocket engine) will ...
• 2,089
228 views

### For a given mileage, which is more profitable, multiple short flights or fewer long flights?

In a simplified scenario, which is more profitable for an airline, operating 10 short flights (400 miles) or 5 long flights (800 miles), for a total of 4,000 miles flown in each case? To make things ...
• 2,799
234 views

### What happens if you preselect your destination QNH during cruise?

I've noticed some pilots preselect their destination QNH on their side of the FCU. In order to preselect the QNH, you need to momentarily switch out of STD which made me wonder: Assuming your side is ...
• 575
1 vote
70 views

### Which Piston General Aviation Aircraft Engine Has the Longest TBO?

After doing some initial research, it appears most GA piston engines have a recommended Time Between Overhaul of around 2,000 hours. I was wondering if there are any other engines that may have a ...
• 71
34 views

### What type of charts does Jeppesen FD Pro X use?

In Jeppesen FD Pro X application in EFB (iPad), What type of charts are being used in Approach plates and High IFR enroute charts ? Provide the source, if possible.
30 views

### Declare DATCOM parameters for a specific UAV Heron

I'm currently attempting to use DATCOM to create the configuration for the UAV Heron. However, I'm encountering difficulties with its tail. Could you please provide assistance? I read "THE USAF ...
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80 views

### Why doesn't the Coanda effect also pull air from inside the jet / streamline?

As explained nicely in this answer, the Coanda effect will make a streamline of air draw from the surrounding air outside of the streamline. This picture shows it nicely : So my question is what ...
• 2,089
1 vote
211 views

### How can a non-pilot land a single-engine plane in an emergency?

Can a non-pilot land a single-engine plane in an emergency? Not a big plane with hundreds of passengers and lots of computer stuff, I mean a little plane (light aircraft, propeller up front, just a ...
• 113
6k views

### Why don't airports use different radio frequencies/channels for each plane to prevent communications from interfering with each other?

There have been serious safety incidents where multiple airplanes using the same frequency caused simultaneous messages to garble each other. For example, at Pearson International Airport (2020-03-07),...
• 351
92 views

### Does the infinite focal point in a HUD resulting from the collimation mean the HUD is ALWAYS in focus for the pilot?

I've found lots of information regarding inifinite focus/projection, and collimation with HUDs. However, I am unable to get a definitive answer to this question. I understand that the HUD is in focus ...
• 153
33 views

### Is ICL Surgery Approved by DGCA in India?

In India, my physical doesn't look like a good fit for Laser Assisted in Situ Keratomileusis, LASIK, but I am considering the Implantable Collamer Lens, ICL. I am not sure if the ICL be approved by ...
54 views

### Arinc 429: how to detect the data frame start?

I am designing an Arinc429 receiver based on a micro-controller with two interrupt inputs served by a circuit converting the +/-10V standard signals into two separated 0-3.3V streams, respectively ...
169 views

### How much fuel can be saved in a half full of passengers plane?

On a typical airliner (let's say A320 / B737 / or similar), comparing a plane full of passengers vs one half full, how much fuel an airline can save on a trip when the plane is only half full? (This ...
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924 views

### Which aviation flight computer is Spock using aboard the Enterprise (as a prop)?

In the recent Undecided with Matt Ferrell video Why the Future of AI & Computers Will Be Analog after about 05:44, the Original Star Trek TV show's Mr. Spock is shown holding an analog flight ...
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23 views

### Seeking Aviation Project Requirement Documents

I am involved in an aviation project and am in need of detailed examples of project documentation to guide our development process. Ideally, I'm looking for full project document sets that include ...
• 1
67 views

### 737 ALT DISAGREE Non-Normal Checklist questions

1 choose IAS DISAGREE alert is not shown, and then: 2 Verify all altimeters are set to correct barometric setting. 3 choose DISAGREE alert stays illuminated: and here is the thing, WHY 4 Standby ...
• 111
4k views

### What type of aircraft do Tintin and Captain Haddock use on their way to Peru in "The Seven Crystal Balls"?

At the end of Hergé's The Seven Crystal Balls (first published 1943-1944), Tintin and Captain Haddock fly to Peru in a relatively big seaplane (or flying boat?). Is it a real aircraft? If so, what ...
• 405
23 views

### Shuttle dance bank angle timeline [migrated]

I'm trying to see how much capacity the Shuttle had for reducing reentry temperatures by adjusting trajectory. So far, I've only been told then the Shuttle banks up to 80° during reentry. But is that ...
191 views

### "Air Force One" outside of US airspace

Does the USAF aircraft carrying POTUS use the call sign "Air Force One" when in other countries' airspace? I could see some countries getting a bit miffed, seeing as they have their own air ...
102 views

### How did the engines on the ME-262 work? [duplicate]

I have been looking into the ME-262 jet engines recently but cannot quite understand how they worked and was wondering if anyone could explain it to me in a simplified way.
100 views

### How do I choose Cl during cruise flight with a given MTOM and variable S?

Currently I'm challenging myself to build an airplane from scratch. I have a background in aeronautical engineering but I have no experience in actually designing an aircraft from the ground up. (FYI: ...
• 11
3k views

### C-130 supreme propulsion on thought experiments

I watched some youtube shorts of someone playing a simulator and having planes start off from the roofs of tall buildings and trying to takeoff before they crash. For some reason, that creator ...
1 vote
44 views

### Use of Type V platform for regular Air Cargo Transportation with MB-1 chain set

As background, military air transportation is regulated by Technical Orders, Field Manuals, etc. In this case, TO 13C7-1-5 is the one that regulates Platform Delivery System, used for cargo airdrop. ...
154 views

### Why can't you hear an aircraft traveling at Mach 0.95 until it passes?

So say an aircraft is traveling at Mach 0.95 towards you. It's almost going faster than the sound waves it's making. Now say there's a speaker or something on the nose of the aircraft facing forward. ...
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1 vote
183 views

### What is the reason for a taxiway centerline to extend parallel to the runway centerline?

Why does the taxiway centerline extend on this long distance on the runway?
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130 views

### Would a plane similar to a Lockheed Cl-1201 that is capable of deploying jets mid-air be practical in modern day military use?

In the late 1960s Lockheed was reportedly looking into making a massive nuclear-powered jet plane capable of staying in the air for around 41 days and also capable of carrying up to 22 fighter ...
1 vote
33 views

### Does air create a high pressure zone once the low pressure zone is filled in? [migrated]

So say you have a sphere of low pressure air (let's say a 0.5 atm sphere in a 1 atm environment). Air would rush to fill in the low pressure, therefore it would accelerate to the center of it. Wouldn'...
• 2,089
1k views

### First airplane with software?

What is the first airplane equipped with software system? Any type of avionics with the computer code, probably the compiled file. I searched in Google, and it sounds like the F-8C Crusader jet ...
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