Learstar A1
From Kerbal Space Program Wiki
The Learstar A1 is a stock craft that uses the Spaceplane Plus parts and was added into KSP 0.25. It resembles the Space Shuttle.
It is recommended to tweak the thrust of the orbiter's main engines to 60% and tweak down the thrust of the Kerbodyne KR-2L engine at the bottom of the large fuel tank during the flight as fuel is being drawn from the tank.