PPRuNe Forums - Search Results
PPRuNe Forums

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Wikiposts
Today's Posts
Search
Vendor Directory
Search: Posts Made By: QuagmireAirlines
Showing results 1 to 16 of 16
Search took 0.00 seconds.
Forum: Tech Log
30th May 2017, 22:16
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

Its obvious the Halifax accident started from...

Its obvious the Halifax accident started from using flight path angle hold and drifting down. That part is clear, in only the first part of the scenario.
Understand when the pilots finally pulled...
Forum: Tech Log
26th May 2017, 16:23
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

Then you too agree with the original NTSB...

Then you too agree with the original NTSB findings (and the FAA, see below) where they said flare was interfered with by the pitch-down terms by Airbus. I think its obvious. Also, note the CLmax...
Forum: Tech Log
24th May 2017, 13:45
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

I side with the ORIGINAL NTSB finding. Its as...

I side with the ORIGINAL NTSB finding. Its as simple as that.
People writing in here can deny actual flight physics, can insult me for no reason, can act as if they know everything, can make up...
Forum: Tech Log
23rd May 2017, 13:39
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

---- Hey, Airbus, thats called a "flare". LOL ...

---- Hey, Airbus, thats called a "flare". LOL Are they saying he flared too early? I don't think he did flare early, as his descent rate was so high, he needed to start mushing it in close to...
Forum: Tech Log
23rd May 2017, 01:44
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

Again, ground or water impact occurs before any...

Again, ground or water impact occurs before any oscillations can even begin to develop. Thats why its all good to have Airbus's alpha protection ABOVE flare AGL. Not below. The NTSB initially said...
Forum: Tech Log
22nd May 2017, 23:50
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

Wait a second. I just found something buried on...

Wait a second. I just found something buried on page 194 of the final NTSB Accident Report appendix. Mini-scandal. Yellow alert. Call the Lone Gunmen of the X-Files....
Forum: Tech Log
22nd May 2017, 21:18
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

You keep missing the fact that he still had 3.5...

You keep missing the fact that he still had 3.5 degrees of stall margin remaining at the same time he held full aft stick. And CLmax is at a little higher alpha than AlphaMax.

Nobody disputes...
Forum: Tech Log
22nd May 2017, 17:55
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

As a flight control engineer, what do you think...

As a flight control engineer, what do you think about the phugoid damping terms active below 100' AGL radar altimeter? That left Sully with not enough pitch angle, a higher rate of descent, and a...
Forum: Tech Log
22nd May 2017, 14:58
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

No question that Sully was wrong to fly the...

No question that Sully was wrong to fly the approach way to slow. The NTSB report and pilots here know that. That said, he had a little pitch-up room i flare which was denied. Next time, or when...
Forum: Tech Log
21st May 2017, 13:41
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

Alpha doesn't stay constant during flare. Yes,...

Alpha doesn't stay constant during flare. Yes, in this case, he wanted to get closer to stall (not a stall, just closer). Flare consists of raising the nose and stopping at a pitch angle, in this...
Forum: Tech Log
19th May 2017, 23:31
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

About that 1988 Paris Air Show accident, did the...

About that 1988 Paris Air Show accident, did the pilot have any stall margin remaining? I haven't read anything about that accident in a long while. I was in the middle of control law development...
Forum: Tech Log
19th May 2017, 23:27
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

There was an A320 water ditching study done (I...

There was an A320 water ditching study done (I lost the link for it, I'll see if I can find it again later) that said 10 to 12 degrees pitch angle is OK. (Sully hit at 9.5 deg pitch, so not bad,...
Forum: Tech Log
19th May 2017, 18:24
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

I think Sully should have been able to get that...

I think Sully should have been able to get that very last 3.5 degrees (stall margin) of pitch he was asking for (by holding full aft stick).
I have no problem with the concept of alpha-protection...
Forum: Tech Log
19th May 2017, 02:44
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

Going into alpha protection mode is fine, at any...

Going into alpha protection mode is fine, at any altitude, even in flare. I don't think thats the problem here. Also, Sully wouldn't have stalled it since he saw pitch & speed just fine, and could...
Forum: Tech Log
18th May 2017, 23:36
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

Great discussion, thanks to all. I've always...

Great discussion, thanks to all. I've always thought Sully did it about right. Not perfect, yet very good. My background is flight control laws (& physics), so I see this as a potential control...
Forum: Tech Log
17th May 2017, 16:31
Replies: 126
Views: 47,156
Posted By QuagmireAirlines

Sully's Flare on the Hudson: Airbus Phugoid Feedback

I just saw the Sully movie, and it reminded me to dig into the NTSB Accident Report about how the ditching was done.

Why was Airbus not admonished for their flight control laws fighting Sully's...
Showing results 1 to 16 of 16


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.