All Questions
22,863
questions
1
vote
0
answers
6
views
Can a pilot with a PPL be reimbursed by an employer for fuel?
If someone with a PPL has to travel for work, and they decide to take their plane, can they be reimbursed by their employer for fuel?
- 222
0
votes
0
answers
4
views
Is there a "learner's permit" for pilots?
To get a driver's license (in Oregon), you have to pass a written test, get an instruction permit, get 100 hours of supervised driving practice, take a drive test, then get your driver's license, at ...
- 222
1
vote
0
answers
37
views
What is the trade off of a cargo feeder network vs purely using trucks?
I'm assuming a cargo feeder network is much faster to deliver packages to remote locations than by truck. Is it more expensive than simply moving the same goods by trucks? What are some other trade-...
- 185
1
vote
2
answers
78
views
What happens when you put significant weight on the tail of a commercial airplane?
I'm curious what happens if you put some extra weight in the back of the airplane (let's say a small GE turbine or something). I'm new to Stability and Control side of things and curious how the new ...
- 11
9
votes
1
answer
574
views
What is the purpose of quickly moving the speedbrake lever on the 757 during rollout?
I found two videos where the PF quickly moves the speedbrake lever during rollout on the 757. Note that they are already deployed. Here are the links: video 1 and video 2 (out of view). What is the ...
0
votes
2
answers
105
views
What happens if you put car gas in an airplane?
If I understand correctly, small planes like the Cessna 172 use 100 octane leaded gasoline with no ethanol. What would happen if you put regular unleaded car gas with ethanol in one?
- 222
2
votes
1
answer
54
views
Why is a pressure type sensor fire warning system not affected by bends or kinks in the line?
In a pressure based fire warning sensor, there is a line containing helium gas with a hydrogen core. Flight manuals say that a bend or kink in the gas line does not affect their operation. But if ...
- 129
0
votes
0
answers
32
views
I need to find either the relationship between power and lift force in helicopters (RC ones if possible)
My original goal was to investigate the relationship between voltage and lift force in toy helicopters, however i've been advised that it will be easier to find help with the relationship between ...
1
vote
0
answers
69
views
Why do most canards have swept wings?
So most canards have swept back wings. Now I have been told that it is that way to ensure yaw stability (for example in a crosswind) - not sure though.
But then I look at the new Lilium jet, which is ...
4
votes
1
answer
142
views
What biplane of the Army Air Reserve is in this picture?
This is the second example of the biplanes they flew.
Can anyone identify this biplane flown by the 476th pursuit squadron "The Black Falcons" of the 322rd pursuit group of the Army Air ...
- 61
2
votes
1
answer
100
views
Can anyone identify these Biplanes flown Army Air Reserve stationed at Clover Field, Santa Monica, California in mid the 1920's?
Can anyone identify these biplanes flown by the 476th pursuit squadron "The Black Falcons" of the 322rd pursuit group of the Army Air Reserve stationed at Clover Field, Santa Monica, ...
- 61
11
votes
3
answers
2k
views
Is there a somewhat realistic FOSS flight simulator for Linux?
Are there any free and open source flight simulators for Linux that are fairly realistic (i.e. if I play one for a while, I will have some idea of how flying a real plane works)? The only "flight ...
- 222
1
vote
1
answer
90
views
Is it possible to work for free in Aerospace Industry for experiences
I am currently in a master's Aerospace Engineering program and are trying to buff up my resume by having some experiences. I heard that in IT industry, there are ways for new programmers to earn ...
- 583
0
votes
0
answers
40
views
Cadet program qualifications [closed]
So just a back story here, my dad is currently a pilot for emirates airlines and I already have a UAE residents visa. By May 2023, I will have my FAA license (CPL) and a Bachelors degree.
So I guess ...
6
votes
1
answer
1k
views
In aircraft reliability monitoring analysis, why is the calculation of defect rate per 1000 FH?
In aircraft reliability monitoring analysis when we calculate the alert level, why is the calculation of defect rate per 1000 FH?
- 551
11
votes
5
answers
4k
views
Which runway should I use, and how can I recognise it in further flights?
Today I wanted to fly from an unknown runway. I have wind from 040 with 13KT and the runway 09/27.
Which runway should I use?
I would use runway 09 because an aeroplane should start against the wind, ...
- 119
1
vote
1
answer
113
views
Do SIMulator hours need to be logged?
I was wondering if there is any regulation, EASA or ICAO, in other words “where does it say” that SIM hours need to be in your logbook? I’ve never recorded those, I’m going to try and upgrade my CPL ...
- 13
-1
votes
2
answers
106
views
What are the loads in a horizontal stabilizer?
I am doing a project and I can't really find any complete information on how to estimate and calculate de loads (lift, weight, drag...) in a horizontal stabilizer.
If someone could give me good papers ...
1
vote
0
answers
63
views
How to estimate range and flight plan of a drone from an image? [closed]
I have the following images of a drone that hovers directly (about 50-100 feet) above my house from time to time.
Naturally I'd like to speak to the drone's owner. What resources are available to ...
- 111
-1
votes
1
answer
115
views
How does an aircraft work with ILS [closed]
In what situation will an aircraft show you "LOC*" in FMA?
What signal does the aircraft received when LOC*?(how does the aircraft know it is on LOC*)
And which heading will the aircraft ...
- 345
0
votes
1
answer
66
views
Can I use my US CPL to join airlines or Cadet programs in other countries?
I am currently about to complete my CPL in the United States, can I join a cadet program in Europe or in the UAE with my current License and ratings? I will have a CPL with instrument rating and am ...
11
votes
2
answers
2k
views
0
votes
1
answer
141
views
Use of Fuses in modern Aircraft Systems
Are Fuses allowed in the control electronics of an airplane?
Are Fuses allowed in the electronic power paths which supply actuators?
Thank you in advance.
- 13
22
votes
2
answers
7k
views
Why do balloons no longer have nets?
In this 1944 documentary it is claimed that a netted balloon would work as a parachute when torn, other sources seem to confirm that. Disadvantages are not mentioned, nor can I think of any. Yet it ...
- 421
0
votes
1
answer
144
views
instructor cleared me for checkride but didn't sign paperwork
took last ride with instructor and he cleared me for private pilot check and helped me set up check ride. He forgot to sign endorsement and left for airlines, He is not answering my calls and the ...
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-2
votes
0
answers
43
views
What is the fee and amount of time needed for an aviation course? [closed]
I'm wondering how much the UNSW aviation course will is and how much longer approximately I would need to invest to get a job in the aviation field. Also, can I earn some licenses when I'm still a ...
- 15
2
votes
2
answers
244
views
How can I calculate the TOTAL drag of the ENTIRE airplane?
I have an aircraft similar to a Cessna 172 and am using a virtual wind tunnel software (flowdesign) to get a drag estimate. I import the airplanes 3D model and I get around 2240 lbs of drag with a ...
9
votes
1
answer
126
views
"w/o DME" minimums on DME required approach
I've found this ILS-Y 26 EPBY approach, where there are two LOC minimums: With D3.0 and w/o D3.0 on Jeppesen chart. On the original AIP charts it says "When stepdown fix not received", but ...
- 91
0
votes
0
answers
49
views
Serviceability for placard/decals [closed]
During the incoming inspection process, we received some placards/decals, i.e (decals related to "do not use this seat" or "no smoking") but the only documents link to this was the ...
- 9
5
votes
5
answers
3k
views
How can you move the thrust reverser to another part of the airplane? [closed]
So this is what we need to research simply: Is there a way we can remove the thrust reverser from the airplane and have something else take care of it?
My initial thought was maybe we could put ...
user65395
3
votes
0
answers
127
views
Poor airfoil choice for wind turbine
I am getting involved in an outreach project where I can modify a small wind turbine with different wing geometries. Are there examples of standard airfoil designs with particularly poor Cl/Cd ...
- 131
0
votes
1
answer
172
views
Why do planes use wire HF antennas instead of smaller ones used by airliners?
why do some planes have wire Hf antennas if smaller hub antennas are more aerodynamic? like on the Boeing 787? Why do some modern aircraft like the c130 still have them?
- 2,498
2
votes
1
answer
153
views
Jumo 222 What are the design choices that lead to this particular nose cone and spinning cowling setup?
Looking for Jumo 222 powered aircraft, I came across this picture of a Junker Ju 288, with this strange spinning cowling and propeller setup, what are the considerations behind this design, how does ...
- 4,280
7
votes
1
answer
817
views
What does the letter "H" on the upper side of ADANA word and mean?
As you can see on the STAR chart of Adana, there is a letter "H" with a black background for the VOR sign's line. I can't find the meaning.
- 73
0
votes
1
answer
99
views
Can I calculate fuel consumption for given reduction of drag coefficient?
If plane or car has Cd of 0.35 and 5L/100km, how much will be fuel consumption if Cd is reduced to 0.20 and everything else stay the same(weigth, frontal area,power etc)?
Is it possible to calculate ...
- 1,176
-4
votes
0
answers
46
views
Pressure/Altimetry [duplicate]
If someone could help me with this problem and show the steps, I would highly appreciate it.
You are on approach to KATL, where the field elevation is approximately 1000ft. During the cruise phase, ...
1
vote
0
answers
93
views
Pilatus PC-12 vertical tail size
Does anyone know what the dimensions / surface area of the vertical stabilizer is on that plane? Additionally, does anyone know the approximate tail volume and its coefficient?
Could not find it ...
1
vote
2
answers
164
views
RPM of wheels on touchdown
What is the average RPM of the wheels of commercial airplanes upon touchdown?
I understand there is variability that comes with different wheel sizes, approach speed, etc. Just thinking of the average ...
- 11
1
vote
0
answers
85
views
Why does V2 decrease for intersection takeoff
I have noticed that the VR and V2 decreases for same FLEX when departing from an intersection runway even when sufficient stop margin is available. What is the reason for this? And also does EFB ...
1
vote
1
answer
186
views
Do F-22 Raptors have different chemical colored coatings on the canopy?
Today I saw an image of a couple of Raptors parked at Spangdahelm AFB and I noticed that one of the Raptors in the image had Golden-tinted canopy glass while the other one had orange-tinted Canopy ...
- 11
3
votes
2
answers
475
views
What fraction of fuel is consumed just for keeping a plane in the air?
In a typical airliner, what fraction of fuel/power/energy is used for providing lift and overcoming lift-related drag
Do the density of the air and the speed through it influence this ratio or do they ...
1
vote
0
answers
58
views
Is there a minimum altitude at which FAA drone rules apply? [migrated]
I know the rules for maximum altitude for a drone is 400ft (in general) but is there a minimum height at which the rules are applied? For example is a drone flying 12 inches off the ground subject to ...
- 111
17
votes
2
answers
2k
views
When a parallel runway is closed at an uncontrolled field, does the notation change for the operating runway?
I’m currently a CFI/CFII/MEI at a flight school based out of Falcon Field (KFFZ.) Falcon has a pair of runways, 4/22 R/L. When the tower closes, runway 4L/22R is closed.
During a training event this ...
- 315
0
votes
0
answers
202
views
Is this quadcopter specification realistic in terms of endurance? [migrated]
According to the specifications, this quad-copter offers a 90-minute flight time on a 14S-14000mah Li-ion battery.
The propellers being used have a 22-inch diameter and have 8-inch blades and the ...
- 27
2
votes
1
answer
69
views
Hypothetical Ramjet-Scramjet-Rocket Combination?
Theoretically, could a ramjet-scramjet-rocket combination exist that operations like a rocket for taking off(below operations speeds from the ramjet or scramjet) or in space, and then switch to ramjet/...
- 225
36
votes
1
answer
6k
views
Pilot NOT confirming checklist in Sully (2016). A script error?
In Sully (2016) there's a short moment when pilot flying (captain) confirms something exactly opposite to the checklist item just read by pilot not flying (first officer):
FO: Emergency electrical ...
- 4,098
0
votes
0
answers
62
views
Airtags and flying safety [migrated]
The TSA allows Airtags in checked and hand-on luggage. Is this the case too for all civil aviation authorities (EU for example)? It has a coin-shaped CR2032 battery and a range of 800 feet low energy ...
- 3,251
17
votes
1
answer
6k
views
Why does the 767’s main landing gear appear spaced considerably farther apart than airplanes of a comparable size?
Below is a comparison of the 767, 787, and A350 main landing gear. The larger distance on the 767 also appears to make the airplane lower to the ground.
8
votes
3
answers
2k
views
How do airplanes with thrust lines above CG still fly without a down pitch moment?
Mainly the Icon A5. I remember trying to make an RC aircraft similar to it, but the moment i'd spin up the motors the aircraft would understandably pitch down. i couldnt fly it at all.
So how do these ...
0
votes
1
answer
137
views
How Do Pilots Account for Weight Shift?
What I mean by this question is cases of airliners or private jets.
You have possibilities of luggage shifting mid-flight, people changing seats (occasional but it does happen), and on private jets, ...
- 1,413