Unanswered Questions
1,331 questions with no upvoted or accepted answers
1
vote
0
answers
165
views
I’ve always heard about the dreaded ramp check. What does it actually entail?
What happens during a ramp check? How likely are you to experience one? What happens if they find something wrong? (A major and a minor example if you don’t mind)
- 2,494
1
vote
0
answers
49
views
Does an increase in Mach number lead to a decrease in Total Pressure Recovery (TPR) for supersonic inlets?
I am curious if the total pressure recover for supersonic inlets, in general, decrease for an increase in Mach number.
CommunityBot
- 1
1
vote
0
answers
138
views
Choosing $\phi/\beta$ in Lateral-directional control design
In designing the Lateral-directional controller for aircraft, there is a parameter called $\phi/\beta$ that is defined as the ratio of the magnitude of the bank angle to the sideslip envelopes in the ...
- 407
1
vote
0
answers
104
views
Why am I getting a low L/D of 4.3 for this supercritical airfoil in Autodesk CFD?
I am a high school student learning to analyze aircraft models in Autodesk CFD for the first time. My current project is analyzing a supercritical airfoil on Autodesk CFD (that was designed in ...
CommunityBot
- 1
1
vote
0
answers
109
views
How far back in time does FAA Institutional Authority for 61.160 (R-ATP) minimums go?
61.160 contains the requirements for an R-ATP certificate, and there is a list of FAA approved institutions that are eligible to graduate applicants to meet the R-ATP requirements.
There is a column ...
- 71.8k
1
vote
0
answers
102
views
CL604/650 (or CRJ1/2) max loiter time (using it as a reference point to compare the A-10 to)
In some discussions I was having with a (back-office) USAF acquaintance about the F-35 vs. A-10 debate, the topic of loiter time came up. Wikipedia provides a 1.88 hour (112min) loiter time for the A-...
CommunityBot
- 1
1
vote
0
answers
723
views
How to calculate the minimum possible flight speed of an aircraft?
So for the minimum possible flight speed an aircraft can fly with for a given altitude, I just use
Lift=Weight and solve for the velocity.
But: I need to insert a lift coefficient, which I can get ...
- 32.6k
1
vote
0
answers
165
views
Can the FAA 8130-3 have "modified" status if a part is converted by replacing piece-parts from IPC?
I have been trying to identify if the FAA 8130-3 Instructions have some clarity but am unable to deduce if this situation is indeed acceptable. A sequence of events (Of sorts) is given below:
A Part ...
- 71.8k
1
vote
0
answers
217
views
Did C-124 loadmasters receive parachute and water survival training?
When the position of "loadmaster" was created for the Douglas C-124 Globemaster II, did prospective USAF loadmasters attend the parachute training and water survival school at the 3904th ...
- 19
1
vote
0
answers
89
views
What is the relation between cargo smoke and EDTO?
I have heard a lot of people discussing about cargo smoke and Extended Diversion Time Operations (EDTO) together. Just want to know how these two affect each other.
CommunityBot
- 1
1
vote
0
answers
89
views
What is a typical fuel temperature entering the burner for different mission flight points of a civil aircraft?
Is there a target regarding the fuel temperature that enters the turbine engine's combustion chamber and if so does it change with different operation flight points in civil aircraft applications?
Is ...
- 63
1
vote
0
answers
63
views
Time to take the ATPL and license conversion
How long does it take to get the EASA ATPL license on average?
And if, after obtaining the ATPL licence in a particular country, you are recruited in a foreign country, do you need to re-take ...
- 11
1
vote
0
answers
125
views
How much is thickness of air layer with zero velocity at wing surface?
How thick is the layer of air that is not moving(zero velocity) at the surface of wing, and can this be taller than the relative roughness height?
Because everything that is inside this layer (V=0) ...
- 13
1
vote
0
answers
308
views
Does Betz's Law apply to jet engine turbines?
Betz's Law says the extractable power from wind is only 59% (16/27) of its original power.
$$P_{max} = \frac{16}{27} \frac{1}{2} \rho A v^3$$
Rho is the gas density, A is the cross section area of gas ...
- 13.5k
1
vote
0
answers
53
views
How to calculate the the variation of Cl wrt the angle of defection of the elevator?
I've checked the lift requirements of the aircraft and selected an optimal airfoil and designed a wing with dimensions of MAC 47cm and semi-span of 163.2 cm and a airfoil S1223. The horizontal ...
- 56.9k