I can't say I've gone through every aircraft, but many of them - Alllied, Central powers, bombers, fighters, various Albatrosses, Sopwith Camel, Sopwith Triplane, Pfalz, Be 2, etc. All the same. Doesn't matter what altitude, location, weather conditions, time of day. Same thing each time and the same effect occurs after a warp. Drops like a brick until I pull back on the joystick, then corrects. Happens in free flight, dogfight, ground attack.
I have tried multiple combinations of aircraft characteristics but usually easy flight model, auto mixture (on or off), auto rudder (on or off), aircraft stress (on) - makes no difference.
The pilot is assigned to Jasta 1, Albatross DII fighter, Proville, January 1917. But, again, in QC I've used other aircraft, changed locations and seasons.
I've also noticed that when starting BHAH QC then ending flight, I first end up at the Overides screen, not the QC screen even though though I've set "Exist CFS3" to "off". Adds a lot of time to getting back to QC screen. After that, it goes back to the QC screen.
On the other hand, although the frame rate records a lower number than OFF Phase 2 and other CFS3 progeny, BHAH runs amazingly smoothly and the graphics, sound and performance are great. But I digress.