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-   -   Angle of attack and pitch attitude (https://www.pprune.org/tech-log/658664-angle-attack-pitch-attitude.html)

Mogwi 22nd Apr 2024 12:50


Originally Posted by megan (Post 11636368)
And thank god for the altitude you had available below you I guess Mog. Base height set too high :p

Indeed! Prob was due to mid-handling a braking-stop manoeuvre at base ht (5000’) over the Med. Ended up going down like a train with yaw vane at 90 left and wings level, rotating in yaw 360 degrees/sec. Broke the jam by shoving the nozzles aft and getting a face full of sea at 3000’ with the nadir star in the centre of the HUD.

Normally requires c 5000’ to recover from vertical but luckily the “display pug-up recovery” worked - hover stop, full power, 8 units AoA. Recovered at 1500’ and knocked it off!

Beers on me that night. Luckily the HUD camera was running as I was about to take a shot, so Handling Squadron got to see it!

Another of the 9 gone.

Mog

EXDAC 22nd Apr 2024 13:02


Originally Posted by john_tullamarine (Post 11640537)
A comment. I know both zzuf and megan and each is highly regarded in his field. In particular, l would be very careful arguing with zzuf on matters relating to certification flying.

Why don't people who expect their opinions and factual statements to be respected post something about their background in their public profile? We don't all know everyone who posts here.

PEI_3721 22nd Apr 2024 14:42

EXDAC, "Why …" because anyone can makeup credentials just as much as they choose to disbelieve a credible post. " … that anyone can post anything they want, under any anonymous cover, and never have to defend their views or get called out for being wrong."
At best, providing justification for what is posted, opposed to unsubstantiated opinion could be a basis of peer review. Unfortunately this the "Google-fueled, Wikipedia-based, blog-sodden" world today.

"So what can we do? Not much, sadly, since this is a cultural and generational issue that will take a long time come right, if it ever does. … every discussion must take place within limits and above a certain baseline of competence."

"… when citizens forgo their basic obligation to learn enough to actually govern themselves, and instead remain stubbornly imprisoned by their fragile egos and caged by their own sense of entitlement, experts will end up running things by default."

https://thefederalist.com/2014/01/17...-of-expertise/

Remember: having a strong opinion about something isn’t the same as knowing something.

EXDAC 22nd Apr 2024 18:51


Originally Posted by PEI_3721 (Post 11640658)
EXDAC, "Why …" because anyone can makeup credentials just as much as they choose to disbelieve a credible post. " … that anyone can post anything they want, under any anonymous cover, and never have to defend their views or get called out for being wrong."

I understand the point but I have no problem believing what you posted in your public profile. Do you doubt anything I posted in mine?

If I were a graduate of ETPS I'd be happy for anyone reading any of my posts to know that (or prove I wasn't if they didn't believe me). However, my time at Boscombe Down was in a minor support role for Tornado not mixing with, learning from, and arguing with, test pilots. That came later in my career.

compressor stall 22nd Apr 2024 19:22

I think in forums like this, respect and credentials are earned not put in profiles.

I’ve been in here since the very early days and know whose posts are worth taking on board. I don’t doubt yours EXDAC and others, I just take them in a neutral space (or negative in certain troll circumstances) until I know otherwise.

Profiles can be anything. What would the profiles of the Boeing folk have said who came in here pedalling a certain narrative the MAX issues?

Abbey Road 22nd Apr 2024 19:35


Originally Posted by Mogwi (Post 11640585)
Normally requires c 5000’ to recover from vertical but luckily the “display pug-up recovery” worked - hover stop, full power, 8 units AoA. Recovered at 1500’ and knocked it off!

Mog, just so as I understand your anecdote correctly, did you mean “display pug pull-up recovery”?

Or is "pug-up" a naval aviation, or Harrier, term that I have not encountered before? 😅

PEI_3721 22nd Apr 2024 21:32

EXDAC, et al; however, … not as a graduate of ETPS, the PAX view of the thread subject identifies similar differences in definition and use of AoA terms.

Furthermore, associated scenarios - stall, loss of control, … also differ; and additionally intermixing civil and military, and evolving designs, no wonder there are few common terms. Our industry is both united and divided by language.

Thus the need for contextual explanation as provided in some posts with excellent analogy - although still requiring the graphic diagram.

zzuf 23rd Apr 2024 03:34


Originally Posted by EXDAC (Post 11640597)
Why don't people who except (expect?) their opinions and factual statements to be respected post something about their background in their public profile? We don't all know everyone who posts here.

EXDAC, I think this is probably where we differ, I have no expectations about any of my posts, except that the content may be read, analysed, researched, and commented on, hopefully constructively. Whether they are accepted or not, should be content dependent, not on unsubstantiated claims of personal qualifications or experience.
But, thanks for your comment, while I won't change my profile I may add a little about any involvement I have had in any particular area of comment, if I see it as important to the conversation.

I agree with PEI_3721 on the value of claims, or lack of, made in the personal profiles.


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