Timeline for What causes the "dead band" phenomenon during takeoff on the Boeing 737?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Dec 4 at 13:09 | answer | added | Koyovis | timeline score: 3 | |
| May 15 at 19:45 | history | protected | Bianfable | ||
| Sep 15, 2023 at 12:25 | comment | added | maximusboscus | Additionally, since the 737 is not fly-by-wire like "Scarebus" I would expect/imagine stick getting "softer" in that moment, similar to a stall. At least in a glider (from experience) we can feel it easily (we have a big window from start of stall until loss of control, so it allows us to train and use only the rudder to balance the wings at low speeds). Advantage is that you get used to keep the stick centered to avoid increasing the stall playing with the ailerons and still allowing full control of bank with rudder. | |
| Sep 15, 2023 at 12:13 | comment | added | maximusboscus | Even from your drawing you can see that the wings are aligned at the same height of the elevators. You have then turbulent flow reaching them, reducing their effectiveness (negative lift in this case). Ground effect will also augment the pressure of the lower part of elevators, which is not what you want in this case (lift should be downwards) | |
| Jun 23, 2023 at 11:06 | comment | added | mins | It seems you already asked this question two years ago. Related discussion at PPRuNe. | |
| Jun 14, 2023 at 12:23 | comment | added | tedioustortoise | It is noticeable on the real aircraft too. 👍 | |
| Jun 14, 2023 at 11:52 | comment | added | Benloper | To your second question, it affects the 767 as well. To your point, primarily ground effect, it does impact other airframes but I think the 737 got so much press around it due to flight simulators emphasizing the effect relative to what some pilots felt the effect was on real aircraft. Most flight instruction curriculum lists it as tail going into ground effect, but the downwash also effects it. Pilots will tell it's noticeable on the 767 as well. | |
| Jun 14, 2023 at 8:41 | history | edited | tedioustortoise | CC BY-SA 4.0 |
Minor grammatical correction
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| Jun 13, 2023 at 18:58 | comment | added | John K | WIth T tails on some airplanes the problem is the opposite; you have to relax a little bit to keep the same pitch rate. In that case it's mostly the T tail moving deeper into the downwash field and the fact that the gear with tail mounted engines is farther aft to keep the thing from tipping back when empty. | |
| Jun 13, 2023 at 15:36 | history | edited | tedioustortoise | CC BY-SA 4.0 |
Improvement to grammar
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| Jun 13, 2023 at 15:26 | history | asked | tedioustortoise | CC BY-SA 4.0 |