Search found 369 matches

by ocelot
Thu Mar 21, 2019 7:22 pm
Forum: Aviation Safety Discussion Forum
Topic: Brazil's ATC troubles, the latest news
Replies: 0
Views: 17

Brazil's ATC troubles, the latest news

Broken regulatory framework results in widespread filing of false flight plans, with predictable consequences.
https://www.bbc.co.uk/news/stories-47585703
by ocelot
Thu Mar 21, 2019 7:17 pm
Forum: Off Topic Forum
Topic: Railroad Thread
Replies: 318
Views: 66189

Re: Railroad Thread

Hong Kong tries out a new signalling system for the subway: https://www.bbc.co.uk/news/world-asia-china-47607676
by ocelot
Thu Mar 21, 2019 7:14 pm
Forum: Aviation Discussion Forum
Topic: Are [i]we[/i] comfortable with how wings work?
Replies: 27
Views: 255

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?
by ocelot
Wed Mar 20, 2019 3:51 am
Forum: Aviation Discussion Forum
Topic: Are [i]we[/i] comfortable with how wings work?
Replies: 27
Views: 255

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 ocelot
Wed Mar 20, 2019 3:45 am
Forum: Aviation Discussion Forum
Topic: F.A.O.:Gabiee- Re: What's the trim doing now?
Replies: 15
Views: 189

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 ocelot
Wed Mar 20, 2019 3:32 am
Forum: Aviation Safety Discussion Forum
Topic: Laser DC-3 in Colombia
Replies: 10
Views: 132

Re: Laser DC-3 in Colombia

Granted.
by ocelot
Wed Mar 20, 2019 3:21 am
Forum: Aviation Safety Discussion Forum
Topic: Atlas 767, Houston
Replies: 69
Views: 914

Re: Atlas 767, Houston

Can anyone think of a weather phenomenon that would explain the above? I can't. Sudden downdraft: airspeed remains about the same, VS goes negative, but pitch would not change significantly. Sudden updraft: the opposite - airspeed remains about the same, VS goes positive, pitch stays about the same...
by ocelot
Wed Mar 20, 2019 2:31 am
Forum: Aviation Safety Discussion Forum
Topic: Atlas 767, Houston
Replies: 69
Views: 914

Re: Atlas 767, Houston

On thing that may have happened, if they were in IMC and in manual flight, is the known somatogravic illusion of pitching up when in fact you are accelerating, which can be counteracted with a strong push down by the pilot. This happened many times in GA airplanes taking off in conditions of very l...
by ocelot
Wed Mar 20, 2019 2:27 am
Forum: Aviation Safety Discussion Forum
Topic: Laser DC-3 in Colombia
Replies: 10
Views: 132

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 ocelot
Sun Mar 17, 2019 8:13 am
Forum: Off Topic Forum
Topic: Cars of the magenta line
Replies: 4
Views: 125

Re: Cars of the magenta line

But apart from that did you enjoy Disneyland?
Ha, I wish.
by ocelot
Sun Mar 17, 2019 8:09 am
Forum: Aviation Discussion Forum
Topic: F.A.O.:Gabiee- Re: What's the trim doing now?
Replies: 15
Views: 189

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

I don't think Lion Air is simply a matter that the dudes were too stupid to pull up. What I do think is that pulling up should buy them SOME time... more than enough time to say, "oh crap, let me get some nose-up trim going … There is so much wrong stuff circulating... Examine the FDR traces from t...
by ocelot
Sun Mar 17, 2019 7:45 am
Forum: Aviation Discussion Forum
Topic: 757 troubles. the latest news
Replies: 38
Views: 3390

Re: 757 troubles. the latest news

Unlike cars, where you have a huge separation of the flow in the rear, in airplanes you have very little if any flow separation in the fuselage. Under this circumstances, most of the drag is not pressure drag but viscous drag (plain friction), and the frontal area is not a huge factor at all, on th...
by ocelot
Sun Mar 17, 2019 7:42 am
Forum: Aviation Safety Discussion Forum
Topic: Laser DC-3 in Colombia
Replies: 10
Views: 132

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:
by ocelot
Sun Mar 17, 2019 7:36 am
Forum: Aviation Safety Discussion Forum
Topic: Ethiopian 737
Replies: 49
Views: 539

Re: Ethiopian 737

What do you make of this panel?
I might suggest "tree", but there apparently aren't any anywhere near the crash site...
by ocelot
Sun Mar 17, 2019 7:29 am
Forum: Aviation Safety Discussion Forum
Topic: Atlas 767, Houston
Replies: 69
Views: 914

Re: Atlas 767, Houston

I don't see that the suicide theory was ever credible. I'm putting my pennies on severe windshear.
by ocelot
Sun Mar 17, 2019 7:25 am
Forum: Aviation Safety Discussion Forum
Topic: Final report out: MD-80 RTO accident
Replies: 3
Views: 96

Re: Final report out: MD-80 RTO accident

2. Yikes- “Controls free, but can’t tell that they are not_correct.”
Indeed.
by ocelot
Sun Mar 17, 2019 7:23 am
Forum: Aviation Safety Discussion Forum
Topic: Not_Breaking: Total Air Disaster in Flyover, 50+ Years ago
Replies: 4
Views: 102

Re: Not_Breaking: Total Air Disaster in Flyover, 50+ Years ago

The point of things like CRM is to systematize for everyone what top-notch folks do instinctively. Or at least, a large part of the point.
by ocelot
Mon Feb 25, 2019 2:28 am
Forum: Off Topic Forum
Topic: Cars of the magenta line
Replies: 4
Views: 125

Cars of the magenta line

So recently I've had the opportunity, if one can call it that, to drive (for several days) a late-model car with the latest in autopilots and cockpit automation. It is fairly rubbish. I'm not saying whose version, because I expect they're all much the same and I don't see any point in calling out ma...
by ocelot
Mon Feb 25, 2019 1:55 am
Forum: Aviation Discussion Forum
Topic: 757 troubles. the latest news
Replies: 38
Views: 3390

Re: 757 troubles. the latest news

So many variables are involved in changing from long and narrow to short and fat that that I don't even know what you have in mind when you say "all else being equal". The effects I had in mind were (a) the dependence of drag on frontal area, and (b) short fat objects have relatively poor longitudi...
by ocelot
Mon Feb 25, 2019 1:34 am
Forum: Aviation Safety Discussion Forum
Topic: Atlas 767, Houston
Replies: 69
Views: 914

Re: Atlas 767, Houston

Curious feature that's come out today: very little fuel with the wreckage. Strange, because fuel exhaustion alone shouldn't cause this kind of event. Maybe an uncontained engine failure ripped open the tank and it all vented a few thousand feet up? But you'd need to be phenomenally unlucky for it to...
by ocelot
Tue Feb 12, 2019 11:26 pm
Forum: Off Topic Forum
Topic: Ottawa bus wreck
Replies: 9
Views: 263

Re: Ottawa bus wreck

I have often eyed the dedicated roadways that some public transport can use to get from point to point. I've seen them in Canada and Southern California, I am sure there's one in the OC.
Oh and: Ottawa has a tonne of these.
by ocelot
Tue Feb 12, 2019 11:25 pm
Forum: Off Topic Forum
Topic: Ottawa bus wreck
Replies: 9
Views: 263

Re: Ottawa bus wreck

I'm trying to understand this one. You have a bus stop designed to kill passengers in double deck buses?
Whole series of them.
by ocelot
Tue Feb 12, 2019 11:24 pm
Forum: Aviation Discussion Forum
Topic: Flight report Feb 2019
Replies: 69
Views: 1002

Re: Flight report Feb 2019

-1

American units are not the same as Imperial units; quite a few of the latter are different; gallons for example.
by ocelot
Tue Feb 12, 2019 11:15 pm
Forum: Aviation Discussion Forum
Topic: Boeing 747: It just keeps going and going...
Replies: 56
Views: 9661

Re: Boeing 747: It just keeps going and going...

According to something I saw the other day in Chinese internet slang "748" means roughly "go to hell". If that's actually true, Boeing's been selling into quite a headwind...
by ocelot
Tue Feb 12, 2019 11:13 pm
Forum: Aviation Discussion Forum
Topic: 757 troubles. the latest news
Replies: 38
Views: 3390

Re: 757 troubles. the latest news

The other one would be to resurrect the 757. Maybe stretch the fuselage a bit, improve the wings, the systems and the cockpit (an the interior) to make it part of the 787 / 777-X "family". And of course put new engines that are 20% more fuel efficient than those in the original 757, and enter the w...

Go to advanced search