Unanswered Questions
1,211 questions with no upvoted or accepted answers
14
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0
answers
375
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What causes the "dead band" phenomenon during takeoff on the Boeing 737?
During takeoff, the Boeing 737 encounters a distinctive "dead band" phenomenon after the initial pitch reaches approximately 10 degrees. Essentially, a slight increase in back pressure is ...
- 1,761
12
votes
1
answer
1k
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Is there a good source for estimating the per unit cost breakdown for a classic GA plane like the Cessna 172?
For instance, on a Cessna 172 what percent is spent on:
Raw materials
Labor actually manufacturing the plane
Testing the completed individual planes
R&D Making the plane (at this point, very ...
CommunityBot
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10
votes
0
answers
209
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Why did the F-4 Phantom have quite so many stencilled messages?
Anyone who has built a model of a US Navy or Air Force F-4 Phantom will know the misery of attaching literally hundreds of tiny stencilled informational notices all over its body.
Eduard 1:48 Tamiya ...
- 11k
10
votes
3
answers
1k
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Do aircraft using only spoilerons for roll control, with no conventional ailerons, have a crossover airspeed?
Airplanes generally have a crossover airspeed (a minimum airspeed below which directional control of the airplane cannot be maintained in the event of a rudder hardover). This is because, as airspeed ...
CommunityBot
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10
votes
0
answers
372
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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.
CommunityBot
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8
votes
0
answers
182
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How to interpret flight schedule data from before 1987
I'm trying to interpret schedule data from before 1987 (see example).
Example line:
...
CommunityBot
- 1
8
votes
0
answers
626
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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 ...
- 1,120
8
votes
0
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707
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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 ...
7
votes
0
answers
455
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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
2
answers
697
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 ...
CommunityBot
- 1
7
votes
2
answers
604
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What is the difference in performance between variable pitch prop and two fixed propellers for take-off and cruise speeds?
Push-pull configuration aircrafts usually feature identical engines and propellers working only in tandem for multiple reasons like higher speed, better climb rate, reliability, cost, ease of ...
- 5,708
7
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0
answers
481
views
Which individual airframe has carried the most passengers in its lifetime?
I'm guessing that the airframe 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 ...
- 126
7
votes
2
answers
1k
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Which photo more accurately represents Flaps 1 in a 737-800?
or A recent update in a sim craft changed the visuals from what I'm used to, but from my research it looks to be more realistic. This post clearly reflects the more extended option being more ...
6
votes
0
answers
120
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Are there any analyses of GA tie-down failures?
After a big harbor storm, there are frequently analyses of why boats break free of their moorings. This information is used to improve upon best practices, resulting in fewer boats breaking free and ...
- 4,722
6
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0
answers
145
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Can a non-US registered aircraft be based in the US?
I am a Swiss citizen and I might have to move to the US for a couple of years. I own a small plane in Switzerland (HB-registered) and I'd like to take it with me to the US. As my stay in the US would ...
- 1,631