Introducing the X-52a, the latest in Kerbal Aerospace innovation. Maximum Speed: Mach 1.8 Service Ceiling: 55,000 ft. (16,500 meters) With the avionics package activated, this supersonic beauty flies like a dream. Easy to land on the runway back at the space center and good on fuel. Although I do recommend a flightstick. Note: I do have my jet fuel capacity cranked up on my version of KSP, because I feel the game burns jet fuel way way too fast. This will affect your range, but every thing else will work as advertised. Basic flight instructions: 1. Throttle down, activate your primary airbreathing jet engine. 2. Activate the avionics package (SAS) 3. Throttle up to max 4. Pull up gently to take off. To reach supersonic speeds: 1. Climb to altitude and activate the turbojet engines. 2. Climb to 14500 meters and maintain altitude and heading. 3. Speed should max out around 620 m/s, but it's possible to get her up to 633 m/s [ATTACH=CONFIG]31564[/ATTACH][ATTACH=CONFIG]31565[/ATTACH][ATTACH=CONFIG]31566[/ATTACH][ATTACH=CONFIG]31567[/ATTACH]