Search found 1979 matches

by Gabriel
Fri Mar 22, 2019 5:33 am
Forum: Aviation Discussion Forum
Topic: Are [i]we[/i] comfortable with how wings work?
Replies: 27
Views: 252

Re: Are [i]we[/i] comfortable with how wings work?

[Gabieee Graph] Does that say that angled flatfish surfaces shove air “down”? I would say that flatfish shove water as they please. PS- the stall break is still impressive What that chart doesn't show (but this other one does) is that, while the lift at 45 degrees is comparable to the peak pre-stal...
by Gabriel
Fri Mar 22, 2019 3:17 am
Forum: Aviation Discussion Forum
Topic: Some Good News Once in Awhile
Replies: 5
Views: 26

Re: Some Good News Once in Awhile

For those who don't know, Ornstein is one of the true penny pinching, slave driving, piece of garbage airline CEOs out there.
Yes, "one of the..."... Is there any "one of the not..."?
by Gabriel
Thu Mar 21, 2019 9:16 pm
Forum: Aviation Discussion Forum
Topic: Some Good News Once in Awhile
Replies: 5
Views: 26

Re: Some Good News Once in Awhile

Nice. I think the conversation went like this:

Ornstein: Well done! Let me reimburse you.
Hoshor: Thanks, but only if this becomes a policy.
Ornstein: Ehmmm, no.
by Gabriel
Thu Mar 21, 2019 9:05 pm
Forum: Aviation Discussion Forum
Topic: Are [i]we[/i] comfortable with how wings work?
Replies: 27
Views: 252

Re: Are [i]we[/i] comfortable with how wings work?

Ok, sure. And it works at high angles of attack when the airfoil is stalled why? Because stalled (even horribly stalled) airfoils still deflect air and hence produce lift (although if not as much as non-stalled ones) and kites are lightweight. If you ever experienced a full stall in an airplane, yo...
by Gabriel
Thu Mar 21, 2019 5:13 pm
Forum: Aviation Discussion Forum
Topic: F.A.O.:Gabiee- Re: What's the trim doing now?
Replies: 15
Views: 184

Re: F.A.O.:Gabiee- Re: What's the trim doing now?

Am I the only one who's doing some serious head-scratching about the postflight actions of the prior crew of Lion Air?
You are not alone. I asked that a few times in this forum and there. Other people too.
by Gabriel
Wed Mar 20, 2019 6:55 am
Forum: Aviation Discussion Forum
Topic: Are [i]we[/i] comfortable with how wings work?
Replies: 27
Views: 252

Re: Are [i]we[/i] comfortable with how wings work?

And what about kites? They need to produce enough lift to balance not only their own weight but also the down pull force of the string, and many times they don't look at all like airplanes wings. Because they're tied down they don't really have to generate lift at all; just drag and an angle of att...
by Gabriel
Wed Mar 20, 2019 3:20 am
Forum: Aviation Safety Discussion Forum
Topic: Laser DC-3 in Colombia
Replies: 10
Views: 131

Re: Laser DC-3 in Colombia

From the avherald summary of the preliminary report today, it kinda sounds like they shut down the wrong engine :cry: It sounded to me that they could not feather the failed engine and hence they didn't have performance to maintain level flight and were forced to descend. That would be sufficient, ...
by Gabriel
Tue Mar 19, 2019 8:33 am
Forum: Aviation Discussion Forum
Topic: Are [i]we[/i] comfortable with how wings work?
Replies: 27
Views: 252

Re: [i]We[/i] are TOTALLY Not_comfortable with how wings "work".

Are you Evan? No. I did not say "humans who don't follow the cold word of every procedure". That could be, but it could be very well humans who lack basic general understanding of what they are doing, or freaked out. It could be pilots that didn't seem to take notice of an accident that recently ha...
by Gabriel
Tue Mar 19, 2019 2:35 am
Forum: Aviation Discussion Forum
Topic: Are [i]we[/i] comfortable with how wings work?
Replies: 27
Views: 252

Re: [i]We[/i] are TOTALLY Not_comfortable with how wings "work".

Shipies with sails have been involved in too many Total Water Disasters. Aeroplanies with whings have been involved in too many Total Air Disasters. Coincidence?
Nope, they have a common cause: humans.
by Gabriel
Tue Mar 19, 2019 12:55 am
Forum: Aviation Discussion Forum
Topic: Are [i]we[/i] comfortable with how wings work?
Replies: 27
Views: 252

Re: Are [i]we[/i] comfortable with how wings work?

And what about kites? They need to produce enough lift to balance not only their own weight but also the down pull force of the string, and many times they don't look at all like airplanes wings.
by Gabriel
Mon Mar 18, 2019 7:14 pm
Forum: Aviation Discussion Forum
Topic: Are [i]we[/i] comfortable with how wings work?
Replies: 27
Views: 252

Re: Are [i]we[/i] comfortable with how wings work?

A flattish surface moving through a fluid with an AOA is all you need to generate lift. All the other features are just there in order to improve the lift to drag ratio AND a higher max lift AND a more-benign trailing-edge-type stall characteristic AND provide volume for structure, mechanisms and f...
by Gabriel
Mon Mar 18, 2019 11:59 am
Forum: Aviation Safety Discussion Forum
Topic: Atlas 767, Houston
Replies: 69
Views: 899

Re: Atlas 767, Houston

Can anyone think of a weather phenomenon that would explain the above? I can't.
An initial upset, which triggered an incorrect pilot reaction, may have been weather related.
by Gabriel
Mon Mar 18, 2019 3:13 am
Forum: Aviation Safety Discussion Forum
Topic: Laser DC-3 in Colombia
Replies: 10
Views: 131

Re: Laser DC-3 in Colombia

Doesn't the graphic on AvHerald (overimposed on a picture of the crash) show a flat spin? There's also mention of high rate of descent, but low speed (honest parlour talking asshat question). The picture says impact path so I supposed is what the plane did after contacting the ground, not before. L...
by Gabriel
Mon Mar 18, 2019 2:36 am
Forum: Aviation Safety Discussion Forum
Topic: Atlas 767, Houston
Replies: 69
Views: 899

Re: Atlas 767, Houston

Gabieee: I was attempting to add additional reasoning why a full dive input doesn’t make sense... Ok, got our point. just a clarification: It doesn't need to be a "full dive input" (if with that you mean full column forward input). At 230 knots or so that they were doing 0.5Gs give you about 3 degr...
by Gabriel
Mon Mar 18, 2019 1:48 am
Forum: Aviation Discussion Forum
Topic: F.A.O.:Gabiee- Re: What's the trim doing now?
Replies: 15
Views: 184

Re: F.A.O.:Gabiee- Re: What's the trim doing now?

Hard to understand what happened at the end. I hate what we are hearing, but conversely, I’m not sure why you wouldn’t just sit there all day trimming up as needed Exactly, especially when you have been doing that quite successfully for some 5 minutes. Why did they stop doing what was working? It's...
by Gabriel
Mon Mar 18, 2019 1:29 am
Forum: Aviation Safety Discussion Forum
Topic: Atlas 767, Houston
Replies: 69
Views: 899

Re: Atlas 767, Houston

Also - I get the somatographic stall... The what???? Even if you meant somatogravic, what? but with a somatogaphic dive, you still have a working aircraft... I am amusing that you want somatogravic and not that you are making some joke/pun/sarcasm that I am missing. The thing with the somatogravic ...
by Gabriel
Sun Mar 17, 2019 9:33 pm
Forum: Aviation Safety Discussion Forum
Topic: Atlas 767, Houston
Replies: 69
Views: 899

Re: Atlas 767, Houston

Colgan pulled up like crazy. While dead tired at ~2000 ft AGL in hard IMC. I struggle to extrapolate to 6000 ft AGL and not_really IMC... No good evidence of a pull up during that last 5 seconds that were filmed (and which were VMC) I know you think Colgan pulled up excessively (for 6 seconds), but...
by Gabriel
Sun Mar 17, 2019 7:12 pm
Forum: Aviation Safety Discussion Forum
Topic: Atlas 767, Houston
Replies: 69
Views: 899

Re: Atlas 767, Houston

I get reacting to that, but this was such a gross overreaction that it seems almost implausible. That being said, I have zero experience in such a situation and can't say with any authority whatsoever that this isn't what happened. It just didn't "sound right" I guess. Actually I agree. I just ment...
by Gabriel
Sun Mar 17, 2019 4:05 pm
Forum: Aviation Safety Discussion Forum
Topic: Atlas 767, Houston
Replies: 69
Views: 899

Re: Atlas 767, Houston

Over on pprune, someone posted an article from the Wall St Journal regarding the crash with information from "people familiar with the details". As in anonymous sources. The article says the NTSB is currently focusing on pilot error and theorizes the pilots overreacted to the sudden thrust increase...
by Gabriel
Sun Mar 17, 2019 3:58 pm
Forum: Aviation Safety Discussion Forum
Topic: Laser DC-3 in Colombia
Replies: 10
Views: 131

Re: Laser DC-3 in Colombia

From the avherald summary of the preliminary report today, it kinda sounds like they shut down the wrong engine :cry: It sounded to me that they could not feather the failed engine and hence they didn't have performance to maintain level flight and were forced to descend. It also sounds like instea...
by Gabriel
Fri Mar 15, 2019 4:12 pm
Forum: Aviation Discussion Forum
Topic: Are [i]we[/i] comfortable with how wings work?
Replies: 27
Views: 252

Re: Are [i]we[/i] comfortable with how wings work?

Here's a wind tunnel video. http://www.msn.com/en-us/video/viral/strong-winds-knock-truck-over-in-texas/vi-BBUL2VP?ocid=ientp No big change to aerodynamic theory- just moderately interesting- and is a fun jab at the need for the super critical curved airfoil requirement vs. the barn door. Seems lik...
by Gabriel
Fri Mar 15, 2019 1:43 pm
Forum: Aviation Safety Discussion Forum
Topic: What should [i]we[/i] do about social/political safety stuff?
Replies: 3
Views: 72

Re: What should [i]we[/i] do about social/political safety stuff?

Well, I'll give ya my opinion about letting corporations self-certify things like safety of airliners (and other things like food and drugs): are you familiar with that old expression about the fox guarding the henhouse? :roll: I should add that I say that not *just* because of a distrust of corpor...
by Gabriel
Thu Mar 14, 2019 10:15 pm
Forum: Aviation Safety Discussion Forum
Topic: 737 Max troubles;:The latest news...
Replies: 10
Views: 193

Re: 737 Max troubles;:The latest news...

Confirmed, both Lion AIr flights (the one previous to the crash and the crash one) had stickshaker shaking from rotation throughout most of the flight.
by Gabriel
Thu Mar 14, 2019 9:55 pm
Forum: Aviation Safety Discussion Forum
Topic: 737 Max troubles;:The latest news...
Replies: 10
Views: 193

Re: 737 Max troubles;:The latest news...

One user over there said, with sarcasm, that the MCAS performed its function flawlessly since after all neither plane stalled. To which I wondered if the pilots knew that the plane did not stall, as the same false too-high AoA information that triggered the MCAS supposedly should trigger the sticksh...
by Gabriel
Thu Mar 14, 2019 4:15 pm
Forum: Aviation Discussion Forum
Topic: F.A.O.:Gabiee- Re: What's the trim doing now?
Replies: 15
Views: 184

Re: F.A.O.:Gabiee- Re: What's the trim doing now?

*** more than enough time *** Lazy question: Anyone know how fast this MCAS thingie puts in nose-down trim?...I always thought that trim progressed kind of slow and gentle...But maybe if you need to fight stall that has nose up tendencies :shock: , maybe it needs to kick in faster? I might be wrong...

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