Unanswered Questions

975 questions with no upvoted or accepted answers
9 votes
0 answers
341 views

What equations and constants did they use to build the E6B flight computer?

E6B Flight computer: During my practice test, I tried to use the wikipedia provided equations to calculate Density Altitude and ended up with different results than the E6B. In this case, it looks ...
9 votes
0 answers
286 views

Who is this flyer seen in Oakland c. 1929?

Looking for identification of the man on the left. Second from left is W.A. "Sandy" Sanders, third is Denny Wright, and fourth is Clyde Sunderland. Oakland, around 1929.
8 votes
0 answers
654 views

How can I convert a frozen ATPL from South Africa to an Iranian one?

I have got a frozen ATPL license from South Africa and I'm from Iran. I came back home last year and I have converted my CPL/IR license to the Iranian piloting license by doing Air Law and Human ...
8 votes
0 answers
434 views

Which US airport has the lowest circling MDH?

As I recently contemplated 14 CFR 135.223 and its implications, I began wondering about airports with exceptionally low circling minima. For a little context and background, the part of §135.223 that ...
7 votes
0 answers
228 views

Engine Bearings Damage in Radial Engines

Studying the P47's dive performance in DCS, I noticed how it's easy to damage the engine bearings if you windmill the prop at high speed. Doing some research, I discovered that all radial engines are ...
7 votes
0 answers
114 views

How to interpret flight schedule data from before 1987

I'm trying to interpret schedule data from before 1987 (see example). Example line: ...
7 votes
0 answers
199 views

Boeing 737-800 Source Off Light and Flight Director Bias Out Of View Function

I have seen the following occur during simulator events. With a left Source Off light illuminated and the captain's autopilot and autothrottles engaged (or re-engaged): Captain's flight director ...
7 votes
0 answers
229 views

Are airport emergency vehicles' sirens louder than normal?

So there I was this afternoon, sitting in my car waiting on my wife's flight to get in to Dulles Airport (IAD), in the cell phone parking lot. I was listening to some music on the radio when the ...
6 votes
0 answers
141 views

How was the problem of dive bomber scope fogging resolved during WW2?

During the first half of 1942, US Navy SBD bombers had problems with their bomb aiming scopes fogging over, which reduced the accuracy of their bombing during several early war operations. Was this ...
6 votes
1 answer
545 views

Aircraft with large, double orange lights at night

Question: I saw an aircraft flying over, about two hours after sunset with a pair of bright, large, constantly on, orange lights. I'm wondering what kind of aircraft this could have been. More details:...
6 votes
0 answers
122 views

Why was the minimum turbulence intensity that commercial airliners have to withstand increased?

From 50 fps turbulence intensity at VC to 90-100 fps turbulence intensity at VC. The amended FAR design criteria was introduced in 1980 or 1981 for commercial airliners. What prompted this change?
6 votes
0 answers
347 views

How did Soapy get to fly Hornets?

Allegedly, in early June 1983, while flying a Sea Harrier during a NATO exercise off the coast of Portugal, Royal Navy's Sub-Lieutenant Ian "Soapy" Watson found himself in a rather ...
6 votes
0 answers
184 views

Why do GPS Copter Approaches require a slower final approach speed than conventional Copter Approaches?

AIM 10-1-2 says helicopter instrument approaches are designed with a maximum speed of 90 KIAS. However, it specifically exempts the final segment on GPS helicopter approaches, saying the maximum speed ...
6 votes
1 answer
426 views

Do constant maximum lift to drag ratio variable pitch propeller exist?

Are there variable pitch propellers, where pitch is set so that the blades constantly are at their maximum lift to drag ratio AoA, whatever the incoming relative wind speed & direction? Such a ...
6 votes
1 answer
396 views

How unusual is it for 3 or more E-6 planes to be airborne at the same time?

I noticed there are at least 3 x E-6 aircraft flying at present (call signs: MAYO38, NANA67, and one more which may have landed ...

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