All Questions

0
votes
0answers
21 views

Hardware evaluation board for safety critical avionics software (especially Guidance and Autopilot)

Can anyone provide me examples of evaluation boards for prototype testing of guidance software including autopilot. I am looking for boards that are proven, stable and successful with support for any ...
1
vote
3answers
76 views

How does a pilot maintain stability for an unbalance loaded airplane?

Consider Cessna 172 which has 4 seats, including the pilot, with the seat configuration as the picture below. Say the airplane has no passenger, only the pilot him/her self. I am not sure where it ...
1
vote
1answer
25 views

What's the difference between the Multi Engine Instrument Rating and Instrument Rating in Canada?

Are the requirements for the Multi Engine Instrument Rating the same as Instrument Rating in Canada or is there a separate exam for each of them? Thanks!
1
vote
0answers
8 views

What is APS (Aircraft Prepared for Service) Weight? What does it include?

I am looking for a complete explanation of what APS weight includes and how is it different from Dry Operating Weight and Basic Weight.
1
vote
0answers
63 views

What should I care about in my first ever flight as a passenger [on hold]

I will be sitting for the first time in an airplane on a domestic flight for 1 hour or less. What things I should care about? I get scared of height and also I am very uncomfortable when descending.
1
vote
2answers
88 views

Why is this unit attached to the main landing gear not a common unit for towing or pushback?

Less loading is applied to the fuselage with this method compared to towing or the towbarless way. Why is it not really common?
1
vote
1answer
143 views

Do pilots breathe the same air as passengers?

Do pilots breathe the same quality of air as passengers ? (i.e. identical parameters: same O2, CO2 and O3 levels, same temperature, same humidity, etc.) Do pilots breath the same air as passengers (...
0
votes
2answers
52 views

What principle does the attitude indicator in the G1000 use?

The heading indicator in the G1000 uses a magnetometor, but how can the attitude indicator work in the G1000? Does it work with a tilt sensor, rate sensor or accelerometer?
1
vote
1answer
123 views

Why aren't airliners spin-tested?

According to Wikipedia, only single-engine aircraft with an MTOW no greater than 12500 pounds are required to demonstrate the ability to recover from a spin, and not large or multi-engine aircraft. ...
0
votes
1answer
111 views

Who designed and built Rans S-7 airplane?

I read in Washington Times, a man, named Swingle, who has no knowledge and experience in airplane built one which he called bush airplane. But I read in Wikipedia, RANS S-7 series seems different as ...
0
votes
1answer
87 views

What should a pilot do in this lost communication scenario?

As far as I study, when a pilot faces a lost communication problem, the pilot should consider MEA (Minimum Enroute Altitude, Expected Altitude, Assigned altitude) for altitude and AVEF (Assigned ...
15
votes
1answer
4k views

What are these “pimples” on the jet engine for?

When looking into the General Electric CJ 805-23B jet engine, I have discovered that all forward section of the compressor is covered by a number of near identically looking "pimples". What are these ...
18
votes
6answers
7k views

Why are fuel tanks located in wings?

Passenger aircraft have fuel tanks in the wings. Why? What are the advantages and disadvantages of this location ? examples of disadvantages I would suspect: added weight increases the structural ...
1
vote
1answer
86 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 ...
0
votes
2answers
349 views

Why does the cabin air sometimes smell of kerosene? [duplicate]

Why does the cabin air sometimes smell of jet fuel, although bleed air is tapped before it comes in contact with fuel ? How is this possible? I have smelled this a couple of times in my life (twice ...
0
votes
1answer
65 views

Why and how can a fume event occur?

« A fume event occurs when bleed air used for cabin pressurization and air conditioning in a pressurized aircraft is contaminated by fluids such as engine oil, hydraulic fluid, anti-icing fluid, ...
3
votes
2answers
128 views

What emergencies or failures should I report to ATC? [duplicate]

During a flight, what kinds of emergencies or failures should I report to ATC immediately? For what kind of emergencies or failures am I not required to report them? What is the general rule? Could I ...
-1
votes
0answers
30 views

Maximum speed of a motor spinning a blade [duplicate]

With a blade length of 7cm (individual blade), what can be the fastest speed (in rpm) the motor can spin?
5
votes
2answers
215 views

Can you verify that this aircraft is not a variant of the T-34 Mentor?

On this page, near the bottom, the aircraft below is identified as a T-34. I'm wondering if that's correct, but before I contact them to point out a possible mislabeling, I'd like to find out what it ...
0
votes
0answers
41 views

How Russians develop their missiles? [on hold]

I am interested in How Russians develops their ICBMs. In United States, recently MIL-STD-881D explained the Work Breakdown Structure (WBS) of ICBM. And DOD 5001.02 set up the acquisition system. The ...
8
votes
2answers
2k views

Is bleed air tapped before or after it comes in contact with fuel? And why?

Is bleed air tapped (for cabin pressurization) before or after it comes in contact with fuel inside turbofan engines on passenger airliners ? Specifically where is the location in this diagram ? (...
3
votes
1answer
151 views

Can pilots change the callsign shown on tracking websites mid-flight?

Today I viewed the following flight on FlightRadar24 website. It show a flight with a callsign of 'BLEED' and with the destination missing. Is this a problem with the website or can an aircraft change ...
3
votes
0answers
82 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 ...
3
votes
1answer
129 views

Which airliners have carried the most passengers?

I'm fairly sure that the Boeing 737 series will be in first place, with the Airbus A320 family coming second and perhaps the 727 third. However, perhaps there are some estimates of actual figures ...
0
votes
0answers
97 views

Propeller blade fastest speed [on hold]

With a individual propeller blade that has a length of 7cm, what is the fastest speed (in rpm) can the motor spin.
3
votes
1answer
200 views

Why don’t aircraft use run-flat tyres?

Tyre failures on aircraft during takeoff are fairly common, and are usually (though not always) caused by flat or underinflated tyres (via the overdeflection and overheating experienced by tyres with ...
3
votes
1answer
126 views

Do airplanes have sensors to detect landing gear fires?

Given that retracting a landing gear that happens to be on fire is a suicidally bad idea, for reasons that should be immediately obvious, do airplanes have temperature sensors on their landing gear in ...
3
votes
1answer
105 views

What are the differences between blue airports and green ones on the low en-route chart?

As far as I know, a brown airport on the low en-route chart does not have an approach procedure but blue and green airports do. But what exactly are the differences between these colors?
0
votes
1answer
29 views

Can the FAA allow a foreign training center to add a type rating to an FAA license?

I have an ICAO license and an FAA one with the same type rating on both. I have done the initial training through the FAA in the US, but was able to validate the sim, training center and the DPE to ...
1
vote
1answer
39 views

How do I calculate this question? find the position of the centre of gravity in % [on hold]

Find the position of the centre of gravity in % of the MAC (mean aerodynamic chord) if the distance from the datum to the LEMC (leading edge of mean chord) is 13 meters, the distance to the TEMC (...
0
votes
2answers
61 views

How does scaling of UAV size impact range?

Lets say you have two autonomous small aircraft, one with a wingspan of 200 cm and one with 400 cm. Both have the same general design. They are both optimized for travel distance on one full tank (gas ...
2
votes
1answer
34 views

What is the difference between EPE and HUL on the Satellite Status Page of GNS systems?

For exemple on the GNS430 satellite status page you can read, in addition to the GPS receiver status : EPE (Estimated Position Error) DOP (Dilution of Precision) HUL (Horizontal Uncertainty level) ...
2
votes
1answer
56 views

Can a simulator (FFS) be used in place of a Technically Advanced Aircraft (TAA) to meet the commercial experience requirements?

14 CFR 61.129(a)(3)(ii) lists the aeronautical experience requirements for a commercial certificate. It says: (ii) 10 hours of training in a complex airplane, a turbine-powered airplane, or a ...
2
votes
0answers
26 views

What are the requirements to obtain the ATP license in Canada?

How much exams does a person need to do in Canada do become a ATP pilot and how many hours will be needed to become a pilot, for example ground school time, flight hour time etc....
0
votes
4answers
176 views

Aviation theory for fighter pilots

Background: I'm an 18-year-old Finn and so I'll be starting my military service next summer. I'm currently applying to the Air Force to become a fighter pilot, but I don't have any previous training ...
2
votes
0answers
32 views

How are compressor maps drawn?

I've always thought they are empirically derived: once you have your axial compressor phisically in a bench, you set both a rotational speed and a mass flow throught the turbomachine then you measure ...
1
vote
2answers
42 views

The sharp leading edge results in a larger pressure peak than airfoils with larger radius leading edge?

I know in the real world the sharp leading edge will results in a larger pressure peak.And there are three types of stall.But I want the explanation in theory.I can't overcome the problem why the ...
0
votes
0answers
35 views

How to determine the bulge of an airfoil?

In calculation or designing, how to determine the airfoil bulge (thickness)? What is the guideline or consideration in designing airplane's wing? We all know that the bulge (the ticker in the airfoil) ...
4
votes
1answer
95 views

Circa 1942 Republic of Ecuador - Can someone identify the aircraft in the background?

Circa 1942 Republic of Ecuador - Can someone identify the aircraft in the background?
0
votes
1answer
47 views

How can I calculate the angle of attack of a propeller blade? [on hold]

What is the perfect angle of attack for a propeller blade that has a length of 5.45cm when the motor spins at 60,000RPM?
0
votes
1answer
131 views

How to handle seeing someone online claiming to be a pilot or pilot in training, who one feels shouldn't be flying, in the EU?

Suppose that on some aviation-related Internet discussion forum, one comes across contributions from a user who claims to either be training for a pilot's license, or to have a pilot's license. ...
0
votes
1answer
117 views

What is the exact purpose of the string attached between front fuselage & the tail section of the transport aircraft's? [duplicate]

]2 228]3]3 Usually I got to notice a string attached between front fuselage to rear tail section of the transport aircraft's, what exactly might be the purpose or function of it? But comparatively, I ...
1
vote
1answer
159 views

Why is the nose cone of Russian fighters pointing slightly down? [duplicate]

Let's take SU-30 as an example: The nose cone is clearly pointing a bit downwards with respect to the level of the engines and wings. Why is this? How can this kind of a banana even fly properly? ...
4
votes
2answers
409 views

On a flight with short stops, do you terminate flight following at each stop?

On a cross-country trip, is it normal to terminate FF at each stop and reacquire it (potentially just a few minutes later) for the next leg, or would ATC prefer that you advise them it'll be a short ...
3
votes
4answers
253 views

Do airplanes with fixed gear usually turn upside down during water landing?

During discussion about emergency landing on water in this YouTube video (4:00) the flight instructor said: "...the problem with these airplanes with a fixed gear, you're usually going to be ...
39
votes
2answers
2k views

How can I find my grandmother's OLD instrument rating documentation?

This is my grandmother, Nathalie Myrtle Brown: The big-eared kid she's posing with is my dad. She has a claim to fame in that she was the first female instrument-rated pilot in the state of Iowa, a ...
0
votes
0answers
28 views

Where to study load analysis? [on hold]

I am trying to learn the theory of load analysis. I am reading Structural Load Analysis for Commercial Transport Aircraft: Theory and Practice by T. Lomax, but there are a lot of terms I don't ...
0
votes
3answers
61 views

What are the B737 MAX 8's OEW and max payload?

I have Googled it, but have not found official info on that.
2
votes
1answer
130 views

Can a lightning strike lead to structural damages of the fuselage and eventually cause decompression?

I know that modern aircraft are designed to withstand lightning strikes. Still is there a possibility for aircraft to sustain significant damages of the fuselage due to lightning strikes and ...
1
vote
0answers
88 views

Why are airline meal portions so small? [on hold]

Why are airline meal portions so small, even on long-haul flights ? Sometimes it's not even enough for children, let alone adults. I have some assumptions, but I would like to submit this question to ...

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