OK, this is bizarre. I have a situation with the Go-229 in the landing phase. This happens when it is being flown by the autopilot, or as an AI plane.
Everything works normally right up until the flare of the landing.
Then - without the AI adding any power, or raising the gear (but it does raise the flaps) - the plane goes vertical and climbs at a steady 200 (ish) km/h up to about 5000 metres !!
Just for good measure it also rolls (like the Shuttle launch) - but at max height the AI cuts the tiny amount of engine power and loses interest in staying alive. The crash then happens a few k's from the airfield.
Final approach - all appears good....
At the Flare - we will now fail to hit the ground....
… and go vertical - on minimal thrust and almost max drag
I can add the logfile if it would help - but I have tried this on my main version (4.12.2 Modact 5.3, with loads of planes / textures / etc) and also on a VP Modpack version - with the same results
I noticed this in a mission within a campaign I have built (the 229's are AI eye candy), but the results are similar in QMB - some planes land normally but the first flight always goes vertical.
I thought I had the answer - fuel load - 80% and above worked in QMB but not in the missions (that's when I started biting the keyboard).
My rig is pretty basic: Core i5 650, 8Gb, GTX 650Ti, on Win 10 64 bit.
Can I ask if anyone can replicate this - if it's just my weird setup then so be it.
P.S. On another mission in my campaign I subbed in the 229 and she went to 90,000m - that's X-15 territory !!