This is the fix for me, and I can fly again ‘with’ my engine sound turned up and/or multiplayer turned on. It’s puzzling me as to why these two aircraft were released with such a game-breaking bug in them. It’s also been stated that both were identified as having serious issues during Beta testing, yet here we are, using a community patch…
Anyways, this patch works perfectly folks, use it or wait this bug out for 3 months, if no hotfix comes.