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Forum: Tech Log
26th Apr 2022, 23:26
Replies: 1,677
Views: 531,412
Posted By Vessbot

Given how the crew spent 90-95% of the time with...

Given how the crew spent 90-95% of the time with the stick aft of center requesting nose-up response, the argument over how “hidden” the airplane’s lack of nose-down authority was, seems to me kind...
Forum: Tech Log
1st Aug 2017, 18:12
Replies: 1,677
Views: 531,412
Posted By Vessbot

You guys seem really wedded to the definition of...

You guys seem really wedded to the definition of "deep stall" being limited to the particular blanked stabilizer phenomenon in T-tails. Or otherwise diminished pitch authority. Fine, I'll live with...
Forum: Tech Log
31st Jul 2017, 20:17
Replies: 1,677
Views: 531,412
Posted By Vessbot

Yes it did, AOA for most of the ride down was...

Yes it did, AOA for most of the ride down was about 40 degrees. Typical stall AOA is about 15 to 20.
Forum: Tech Log
30th Jul 2017, 22:00
Replies: 1,677
Views: 531,412
Posted By Vessbot

Pretty sure that the "untested" region he's...

Pretty sure that the "untested" region he's talking about is the ~40 deg AOA deep stall that the plane was in, not "approach to stall"




I would not expect them to be any more capable of...
Forum: Tech Log
29th Jul 2017, 19:56
Replies: 1,677
Views: 531,412
Posted By Vessbot

This is what's also in use by the 777 and 787. C*U

This is what's also in use by the 777 and 787. C*U
Forum: Tech Log
24th Jul 2017, 21:42
Replies: 1,677
Views: 531,412
Posted By Vessbot

Nothing is an absolute solution, but that doesn't...

Nothing is an absolute solution, but that doesn't mean that we shouldn't enact mechanisms that have a partial chance of helping. And it certainly does not mean that we should leave in place...
Forum: Tech Log
20th Jul 2017, 02:03
Replies: 1,677
Views: 531,412
Posted By Vessbot

You deleted the post you're apologizing over, so...

You deleted the post you're apologizing over, so now mine looks like nonsense to those who didn't read yours.
Forum: Tech Log
19th Jul 2017, 23:09
Replies: 1,677
Views: 531,412
Posted By Vessbot

You're not reading him right. His first sentence...

You're not reading him right. His first sentence is "The problem that I see is in [what the problem is]"
Forum: Tech Log
19th Jul 2017, 22:34
Replies: 1,677
Views: 531,412
Posted By Vessbot

1. You're substituting your desire for how the FD...

1. You're substituting your desire for how the FD should be followed, for the reality of how it is in far too many cases (including, almost certainly, this one).

2. With any level of intensity of...
Forum: Tech Log
19th Jul 2017, 21:24
Replies: 1,677
Views: 531,412
Posted By Vessbot

What I'm saying is that if turned off...

What I'm saying is that if turned off automatically for whatever reason (such as invalid air data in this case), it should stay off until manually set. Do you see the problem with coming on...
Forum: Tech Log
19th Jul 2017, 16:07
Replies: 1,677
Views: 531,412
Posted By Vessbot

One item I haven't seen in all these discussions...

One item I haven't seen in all these discussions is the flight directors. The report says that they disappeared along with the autopilot disconnection, and then reappeared and disappeared several...
Forum: Tech Log
15th Jul 2017, 02:58
Replies: 1,677
Views: 531,412
Posted By Vessbot

Considering their heading wandered more than 180...

Considering their heading wandered more than 180 degrees off planned, I say that no, a quick look at their flight plan would not give a GS useful for comparison.

I maintain that the FPD is for...
Forum: Tech Log
11th Jun 2017, 14:49
Replies: 1,677
Views: 531,412
Posted By Vessbot

I understood that from your previous post. I...

I understood that from your previous post. I don't know your background, but your premise forces me to spell out what's obvious to trained pilots: groundspeed has no effect on stall. Airspeed (the...
Forum: Tech Log
8th Jun 2017, 22:21
Replies: 1,677
Views: 531,412
Posted By Vessbot

Even in the jetstream? No, there are plenty of...

Even in the jetstream? No, there are plenty of air-data sources there to diagnose a stall. Groundspeed cluttering the PFD would be absurd.
Forum: Tech Log
8th Jun 2017, 19:57
Replies: 1,677
Views: 531,412
Posted By Vessbot

Anytime I get on this topic, I think of this very...

Anytime I get on this topic, I think of this very illustrative passage by Richard Feynman about a long visit to Brazil and his experience of their physics education system. Here...
Forum: Tech Log
8th Jun 2017, 19:40
Replies: 1,677
Views: 531,412
Posted By Vessbot

To me, the answer is easy. There are 2 types of...

To me, the answer is easy. There are 2 types of knowledge in play.

First, there's academic knowledge, like the facts recited by your hypothetical aero student. For the lazy, it amounts to little...
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