Parachuting incident 1

[Alistair_Heaton]

https://youtu.be/2XMESBk0dJw

Sorry reds if it brings up things.

But this shows quiet well what happens when aft CoG and low airspeed occur.

There are a few more things going on with it because it's a twin.

There is some quiet informed comments on that vid

 

[LittleInch]

Maybe he didn't read the comments under the video where it is pretty clear it stalled. If it was deliberate it didn't work because several jumpers were left inside the air plane.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[itsmoked]

Was in no way intentional in this case.

Couple of points:
The first out was the photographer. He stated that he felt the plane starting to stall and jumped before the signal as he realized the plane had just started a full stall.

Note the stall executed the moment the yellow-helmet guy (who got out last) straightened his arms. This put another level of bodies out the side of the plane. In my opinion that blocked the last vestiges of air over the left elevator and that was IT.

The last one out of the plane (down near the clouds) reported that completely involuntarily she was ejected at a high speed. You can see she's launched perpendicular to the fuselage about 50 feet horizontally to the ground.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[Sparweb]

You callin' my buddy a reckless pilot?!

Um, on second thought, he kinda was. Judging by some of the other stories he told.
He settled down a bit in his later years.

 

[hydrae]

saw this analysis of the incident on youtube

https://www.youtube.com/watch?v=8D6-fJdGTac

Hydrae

 

[Alistair_Heaton]

Semi ok for you tube punters but still doesn't have a clue

 

[RedSnake]

If that guy really knows what he is taking about, he at least answered or verified a question I hade a long time that no one could explain to me.
Mainly that if you are in a stal situation with the nose up and the stabilizers are all trimmed down you use the elevators to try to get out of the situation "he hit full elevator nose down" (3:44)

Meaning that my assumption that the elevator horn on SE-MES broke in this situation isn't that far-fetched especially when the welding was so poor.
I hade a colleague make a real CAD simulation with all the data we had at hand, and he showed me the result ones, but he haven't sent me the report that comes out of it.
And every time I meet him and asks him to send the report to me, he starts explaining that if this circular weld that is just there to seal the metal construction isn't good enough it want hold for nothing.
And the importance of really welding this thin materials correctly to get the real durability.
And that if the above scenario would have happened, all the force would have ended up in the worst welded part.
It wouldn't have taken much to to start ripe it apart and when that goes everything would have gone if the circular weld wasn't "good enough". :-(
Which according to SHK and everybody else was just a seal so that water and moist would not get in.


“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein

 

[Alistair_Heaton]

he does way more than most commentators.

Twin engines are very different to singles. Singles can be mostly treated as 2d with the forces twins definitely can't

he is right you basically need just a couple of tac welds to cover the torsional load anything more is just for appearance.

I think he is a ex USAF or Navy test pilot F15 in the old days when they had nothing protecting them from a iceman spin.

I might be wrong but he seems to have more clue than most

 

[btrueblood]

Alistair,

Juan is a multi-engine commercial pilot and trained as a fire bomber, a bit more than a punter (more like a field goal kicker).

 

[Alistair_Heaton]

Same as me then apart from the firebombing.

Unfortunately commercial pilots don't actually have that much knowledge about flight dynamics especially these sorts of situations which we don't get trained for.

As I said he has more clue than most.

I used to fly with the BAe lead test pilot for the Jetstream 41 certification and spent a very enjoyable week discussing turboprop flight dynamics with him winging our way across the North Sea.

It was surprising how different it was to what my commercial training had told me and what I presumed as a mech eng.