All Questions

0
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0answers
3 views

News reports on 737 Max

I would never confuse stall angle of attack with any other but recent report from news outlets are saying that new engine on 737 max causes earlier stall. Cowling airflow may disrupt airflow and ...
2
votes
1answer
21 views

What prevents the use of a multi-segment ILS for non-straight approaches?

An ILS, consisting of a localiser beam to provide lateral guidance (which can also be used on its own for a non-precision approach) and a glideslope beam to provide vertical guidance, is (currently) ...
1
vote
1answer
38 views

Why did the Mercure fail?

The Dassault Mercure was a French regional jet that first flew in 1971 and received its type certificate in February 1974; it resembled an enlarged, shorter-range 737-200, and was designed to serve ...
0
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0answers
21 views

Did Kai Tak have a straight-in approach to runway 13 for higher-performance aircraft?

Runway 13 at Hong Kong’s Kai Tak Airport (closed in 1998 and replaced by the current airport at Chek Lap Kok, to the eternal gratitude of non-masochist pilots everywhere) had a hideously difficult and ...
1
vote
0answers
22 views

Who creates and amends tech logs?

Is it the operator, manufacturer or the NAA? I'm going to assume the operator does the creation and amending and only the NAA is to approve the document?
1
vote
0answers
19 views

THS design approach

What is the general design flow when designing a THS and the attached elevator? I assume you would dimension the max. positive/negative deflections of the THS to meet longitudinal trim requirements ...
2
votes
0answers
22 views

How are forward and aft CG limits calculated?

I have been tasked to create a POH for my aero engineering coursework and part of this task is to create the CG envelope for the theoretical 65 passenger aircraft. I have figured out weight, moment ...
-1
votes
0answers
42 views

Alternatives to aviation? [on hold]

I am 16 years old and I want to be a pilot. I have already chosen physics and engineering as my courses in school. But the fees for becoming a commercial pilot are very high.I wanted to know that if I ...
2
votes
2answers
47 views

What is the maximum holding time?

When arriving at a busy airport, airliners may be stacked in holding patterns, increasing flight time. I know airliners are required to carry extra fuel in case of rerouting (including a safety margin)...
-3
votes
0answers
48 views

Is a Boeing Honeywell ‘Uninterruptible’ Autopilot System pre-installed on any in-service airliners? [on hold]

Some sites make the claim that Boeing has installed an uninteruptible ground-controlled autopilot in aircraft such as the 777 with registration 9M-MRO used for missing flight MH370. Notable claims (...
1
vote
0answers
9 views

In the compressor characteristic, how do I calculate the minimum flow?

I have a small question, how do I determine the minimum flow point on the compressor characteristic? I.e. what is the safety margin on the curve?
2
votes
1answer
48 views

How do I know when to use flaps in glide approach or force landing?

During glide approach or practise force landing, I can see the aimpoint moving down. It means the aircraft will overshoot the field. But I am not sure when should flaps be used or which stage of flaps ...
2
votes
2answers
89 views

Why does pilot bank up to 5 degree to operating engine?

For Vmc condition, one of the solution is up to 5 degree to operating engine to increase ruder effectiveness to maintain control. Why is up to 5 degree? What if pilot banks to more than 5 degree to ...
19
votes
1answer
1k views

Is aluminum electrical wire used on aircraft?

Aluminum electrical wire got a bit of a bad reputation in household wiring due to reacting badly with terminals not properly rated for aluminum. Properly handled, it works fine, but it's so ...
-1
votes
2answers
42 views

Compliance time or period [on hold]

What does a real-time for complying with an AD with these phrases? Prior to accumulating 5,000 landings or within the next 1,000 landings after the effective date of this AD, whichever occurs later.
-4
votes
1answer
101 views

Boeing Dreamliner MCAS [on hold]

If it was not known that Boeing had new software in the Boeing 737 Max, do we know whether this same software is not in the 787-9?
-1
votes
1answer
163 views
6
votes
1answer
180 views

How easy is it to pull the ejection handle in a Rafale B?

A civilian passenger ejected from a two-seat Rafale B during takeoff on Mar 20 2019. The investigation is underway as to how it happened, but one of the possibilities discussed is that the passenger ...
1
vote
1answer
55 views

How does the Angle of attack vary from the root to the tip of a propeller for a fixed pitch prop?

I came across a video while learning about propellers where it showed the angle of attack increased from the root of the propeller to the tip of propeller whose pitch was fixed. I somehow cannot get ...
1
vote
1answer
81 views

What type of engine is mounted on the Cessna Citation Hemisphere?

What type of engine is mounted on the Cessna Citation Hemisphere? Image Source That does not look like a high bypass turbo jet engine. If its not a high by pass turbo jet engine, and given a high ...
3
votes
1answer
100 views

Why does wing bending cause wingtip twisting?

(semanticscholar.org) When aft swept wings bend/flex, the outer wing is twisted leading edge (LE) down (this reduces wave drag), the reverse (LE up) is true for forward swept wings. I've searched ...
-1
votes
2answers
108 views

How to deal with larger and larger engines [on hold]

What are possible solutions, if aircraft manufacturers can't fit ever larger turbofans onto the standard low-wing passenger jet configuration? Below, we see a 737 with large turbofans. If a new ...
1
vote
0answers
46 views

What is the procedure for doing a symmetry check on a Cessna 172? [on hold]

I'm trying to find the steps to do a symmetry check of a Cessna 172. Or a form, or the section of the maintenance manual.
4
votes
1answer
318 views

What are the checklist items for a runaway stab trim on a B737 MAX 8 and MAX 9?

This is a follow up question to this question. This question is not directly related to the MCAS system in the new B737 MAX aircraft, instead, my question is about the checklist for a runaway stab ...
4
votes
2answers
254 views

Is it possible to buy a retired Boeing 747 aircraft?

American airline companies landed their last passenger 747 jet into retirement last year citing higher costs of flying this aircraft in comparison to modern widebody twin-engine aircraft designed for ...
-9
votes
3answers
92 views

What happens to unstrapped passengers if the airliner were to fly inverted [on hold]

If for some reason or the other, because of an emergency, or perhaps craving jail time or did not want her job, or perhaps a girls will be girls moment, a pilot and her captain decided to fly a large ...
3
votes
1answer
111 views

Who applies an airworthiness directive when the airframe is newer than the AD?

For example, an AD was issued in 1990 while the aircraft was manufactured in 2002? Who applies the AD, the manufacturer or the owner?
26
votes
2answers
3k views

What features enable the Su-25 Frogfoot to operate with such a wide variety of fuels?

It is widely attested* that the Su-25 Frogfoot's engines (the Turmansky R-95Sh and later the R-195) were designed to function using a wide variety of fuels, including diesel, gasoline, petrol, ...
2
votes
1answer
85 views

Why are hexa airfoils used on rockets despite having more drag that diamond airfoils? [on hold]

I was doing a study on airfoils shape for a rocket. I tested the diamond and the hexagonal airfoil with Missile DatCom, RasAero and the Shock Expansion theory and from my results it seems like the ...
0
votes
0answers
29 views

What kind of testing do new aircrafts go through in terms of avionics and software upgrades? [duplicate]

I am a UX designer, so my bread and butter is dealing with issues around software user research, information architecture and interaction design. I am very interested in avionics design but ...
1
vote
1answer
87 views

When extreme yoke movement cuts out stab trim on a 737-NG, does it stay off after yoke returns from limits?

I've read that the 737-NG has logic built into the stab trim system that will cause stab trim to cut out if the control column (yoke) is pulled/pushed far/hard enough (it's not clear to me if it's ...
5
votes
1answer
241 views

Is there a way for pilots to report difficulties and challenges experienced during a flight, to the next flight crew?

My question is reflected in the title - is there an official, international system for commercial pilots to report difficulties and challenges faced during a flight to the next and future crew? ...
0
votes
0answers
28 views

Does the FAA have any special requirements for oxidizer tanks on rocket-powered aircraft?

There are quite a number of strict FAA requirements for aircraft fuel tanks (must withstand such-and-such many Gs from such-and-such directions, must be inerted, must be puncture-resistant, et cetera, ...
0
votes
1answer
139 views

Is the in flight emergency manual of a Boeing 737 Max 8 available to read online? [on hold]

I frequently read about pilots going through manuals/checklists/procedures in an emergency situation in an airliner while in flight. Is there an online resource where the public can actually read it, ...
4
votes
1answer
104 views

Why would a C150 tachometer be sluggish?

After having an issue with a tachometer bouncing so much that it fell off, I now have the opposite problem with the replacement (Mitchell D1-112-5025): The tachometer is sluggish. When I open the ...
2
votes
0answers
132 views

How does the 737 MAX MCAS differ from stab trim in other 737 variants? [on hold]

I have the following questions: MCAS will not cut out from excessive control column movement as non-MAX 737 aircraft stab trim does. Is that correct, and is this cutout permanent or does it re-...
-1
votes
1answer
93 views

If the Meteor BVRAAM is the best AAM, and the APG-81 is the best radar for detecting aircraft, then why don't all fighter aircraft simply use these? [on hold]

Why are some missiles incompatible with some aircraft? If fighter A has better radar and missiles than fighter B, then why isn't it possible to simply integrate the better radar and missiles into ...
-1
votes
0answers
52 views

Are there commercial airplanes on which I can access the Internet from my mobile phone? [migrated]

I'm wondering if there are airlines that provide Internet access to passengers when flying longer (> 2 hours). And if it's technically possible at all.
2
votes
2answers
177 views

Will the Boeing 737 MAX 8's software update require recertification of the aircraft?

Will the upcoming software update for the 737 MAX require the plane to go through a new certification like a new plane?
1
vote
0answers
44 views

How do composite aero structures compare against metallic structures in crash resistance?

is there any information available comparing the difference in crash resistance between composite mainly carbon or fiberglass polymers etc vs conventional metallic mainly aluminum aircraft structures.
1
vote
1answer
67 views

Where exactly are the heating elements in the PA-28-180's pitot mast?

I am flying a PA-28-180 but have been unable to find where inside the pitot mast the heating elements would be. I would like to know this to verify my assumption it does not work in the airplane I am ...
3
votes
1answer
164 views

Is it safe to mix different types of fuels in a jet engine?

Hypothetically, if: one got stuck somewhere at a remote airport the jet aircraft or airliner they are flying had a 1/3 tank full of the proper jet A1 fuel there was a tanker at the airport with 1/3 ...
2
votes
3answers
102 views

How are V speeds spoken?

How are V speeds spoken? --Research for my novel. Is it the V and the number or letter notation or is there something more to it? The Wikipedia Page on V Speeds does not delve into the subject ...
0
votes
0answers
42 views

Question about career [on hold]

Good Day, I am support engineer and have had dream of becoming pilot but does not have much knowledge other that hearing that "you should not change your career!" Any help will be appreciated. ...
-9
votes
2answers
138 views

Is aviation slowly dying as of 2019 [on hold]

This debate first started a decade ago but I want to modernize it. The reasons people wanted to be pilots. (I cant find a single reason why someone would want to become an ATC) They watched Top Gun ...
0
votes
1answer
78 views

Where can I find official definition of VFR and IFR? [duplicate]

I know that ICAO Annex 2 'Rules of the air' states rules such as general rules, visual flight rules, instrument flight rules, etc. And aircraft should fly in accordance with either visual flight rules ...
-1
votes
0answers
50 views

Class 1 medical with amblyopia [on hold]

Is there anyone who has amblyopia and looking for class 1 medical cerificate , If yes . He has a solution for his problem and can help me for that?
-1
votes
0answers
278 views

Operating system running MCAS software in Boeing 737 Max 8? [on hold]

A lot is currently reported about the possibly flawed MCAS control software of the Boeing 737 Max 8. What operating system is this software running on? Is it a common OS or some in-house system by ...
22
votes
1answer
3k views

When and why was runway 07/25 at Kai Tak removed?

Wikipedia states that Kai Tak Airport in Hong Kong originally had two runways, both built under Japanese occupation during World War II: ... In 1942, the Japanese army expanded Kai Tak, using many ...
0
votes
2answers
116 views

How long are the nacelle strakes on a GE-90?

For my school project, I'm doing something where I create a nacelle strake on a model plane and I want to make it to scale. Could you please let me know the dimensions of a nacelle strake? I would ...

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