Posts by user "HarryMann" [Posts: 7 Total up-votes: 4 Pages: 1]

HarryMann
2025-06-12T10:24:00
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Post: 11899029
Originally Posted by shared reality
Not familiar with the Dreamliner, but IF correct, it reportedly took off without backtracking, resulting in a TODA of app 1900m.. That sounds very marginal for a heavy 787 embarking on a 9+hr flight.
The horrifying video (IF legit) also suggests the aircraft is seriously on the backside of the power curve with gear down / flaps up..... Speculation: too early rotation due to rwy end approaching (too) fast-then mistakenly retracts flaps instead of raising the gear.... That would result in what we saw in the video... Pure speculation in this rumour network. A sad day indeed...
Looks like a tragic tragic lack of lift and thrust. PF seems to combat sink (or lack of climb rate) by simply pulling back nto deeper draggy stall.
Were flaps up at start of roll? or subsequently after marginal liftoff ? Unfamiliar with 787s interlocks and take-off protections but undercarriage should have been up.or going up in that state at a minimum

Subjects: Gear Retraction

HarryMann
2025-06-12T10:48:00
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Post: 11899052
Originally Posted by JonnyH
Reports suggest, surprisingly, there are survivors. Fingers crossed.
looking at that fireball I\x92d suggest any survivors are not from the aircraft, but from the local population.

Subjects: None

HarryMann
2025-06-13T00:31:00
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Post: 11899866
Originally Posted by CW247
That airport video shows an abrupt loss of lift with the aircraft pointing upwards the entire time which would explain (you know what). An engine failure would create some kind of yawing or change in pitch.
No, nothing abrupt, but a loss of thrust, yes?

Subjects: Engine Failure (All)

1 user liked this post.

HarryMann
2025-06-13T23:13:00
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Post: 11900988
Originally Posted by oxenos
Way back in the 60\x92s on the Shackleton, the time to 80 knots was calculated as an acceleration check. Never heard of any such check being used since then.
yes it was introduced/reintroduced by some airlines in the 70s I believe.

Subjects: None

HarryMann
2025-06-14T23:31:00
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Post: 11901956
Originally Posted by overstress
An aerodynamic stall would do the same. And lay off the patronising, please.
it was clearly not a stalled situation though, until the last few seconds when the PF started a flare mameouve presumably to reduce vertical impact speed.

and with takeoff thrust you wouldn\x92t be stalling that aircraft in that config and situation easily.

no I relly don\x92t agree aerodynamic drag from a stalled wing is going to slow an aircraft with TO thrust by that much. nope.

Subjects: None

2 users liked this post.

HarryMann
2025-06-14T23:38:00
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Post: 11901961
Originally Posted by A320 Glider
Can I just clarify: the 787 has FBW and certain flight envelope protections. If the pilots suffered a dual engine failure after takeoff, they would pull back to stretch the glide as the computers will not allow the aircraft to stall. This is effectively what Sully did when he kissed it into the Hudson like a pro.

In any other aircraft, if you lose thrust in all your engines, you would be pushing the nose down immediately!
Dont follow that logic at all\x85 this flare in the last second or three wasn\x92t IMHO to stretch the glide but reduce vertical impact speed.
sully flared almost perfectly, nothing to do with \x91stretching\x92 the glide.

Subjects: Dual Engine Failure  Engine Failure (All)  FBW

1 user liked this post.

HarryMann
2025-06-15T08:32:00
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Post: 11902232
Originally Posted by WITCHWAY550
My “problem” with sudden power loss is the video does not show a quick nose down as i think he would have done if all thrust has largely reduced.
I expect you (or most of us) reallly don’t know enough about the Flight Control Systems to say that. Any FBW intervention would have been in play and the Captain would notimmediately by instinct have lowered the nose dramatically, whilst assessing the situation… far too low and too much going on.

Last edited by HarryMann; 15th Jun 2025 at 08:50 .

Subjects: FBW