PPRuNe Forums - View Single Post - Plane flips over after crash-landing in Somalia
Old 1st Aug 2022, 04:39
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Originally Posted by Teddy Robinson
I have flown into Mogadishu on many many occasions, and certainly it can be interesting.

Tailwind is either within limits, or out of limits in which case the flight diverts, or is cancelled.

The runway is very long, which rather begs the question what an F50 was doing with its MLG

in the undershoot of a very long runway on a pretty average day?

It makes no sense, these things were daily in and out of LCY, without issues.


TR
Sorry, I oversaw the base leg approach with short final for MGQ.

I don't think, this was an "undershoot".

When there is a landing tailwind of (for example) 20kts, and one does approach on the base leg with 90kts (both airspeed and ground speed), as fdr writes, you'll need military jet performance to pick up the kinetic energy to stay on 90kts airspeed and reach 110kts ground speed. Don't have an acceleration and your airspeed will effectively become 70kts, and (you'll) subsequently drop out of the sky (or at least your margins get tight).

Not to say, because of the (tight) turn to final, your stall speed goes up significantly, the decreasing from 90kts airspeed is no longer enough to fly and your inside turn wing will start to drop. That'll start to happen somewhere half-way your turn to final. Depending on the speeds/situation, you end up nose-down, or just somewhere halfway flipping over and ending up trying to land on the wingtip. Depending on how far your flip did go (before or already through the vertical), you end up with just scraping the wingtip, an extreme hard landing on one MLG (breaking off the whole wing on that side) or just landing upside down. When your wing breaks off, you'll end up upside down, since the other wing still wants to fly (creating a fuselage rotating force, even when the wing is vertical).

The final location off the right side of the beginning of the runway corresponds with the flying direction when the in-turn wing starts to stall somewhere during the turn to final. For this situation, it looks like the wing broke off due to an extreme hard landing, with a subsequent flip-over.

So, no landing gear issues, or an undershoot or so, just a (marginal) in-turn stall. Which fortunately left the fuselage intact and all survived.
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