ok so this is another take on a passenger plane for Nasa. (Start at Yeager) on take off start the engines by pressing activation button "2" this will give you a lot of thrust, when airbourne press activation button "1" followed by activation button "1" this will activate the in flight engines, with the in flight engines activated and on full throttle this plane can reach a speed oif 700+Mph, if you want to go SuperSonic then press activation button "2" with the in fligh ht engines as well this will take the plane upto an incredible speed of 3000+MPH. I have added speed brakes to slow the plane right down when landing. hope you enjoy flying this plane, please leave a comment telling me where i could improve and leave an upvote if you like the plane. Happy Flying!!!!