MiG-21bis tumbles when dropping JATO

[frazefo]

Hi,

I'm performing a JATO (or SPRD) assisted takeoff, and everything goes well (the rockets fire when expected and the takeoff goes well) but then when I want to drop the rockets, flipping the countermeasure cap and pressing the button, the aircraft is tumbling in a spectacular way and the screen goes black in the pilot view because of the G forces.

I attached a track so you can see what happens.

Can you help ?

MiG-21bis JATO.trk

[davewhite]

I recently experienced the same problem. I also cant retract the gear, yes the gear lock is off. It just will not retract the gear after takeoff at all.

[Dolphin887]

We will check both RATO and LG, thank you for the info.