The Green Adjustable Testbed Engine (GATE) is the first iteration of a heavy duty liquid fueled rocket engine design. Based on knowledge gained while developing systems and prototypes for µHoubolt we are now designing our very first adjustable-thrust liquid rocket engine on the largest scale we have operated yet. The test stand TS03-24kN “Franz” is an integral part of the development process to allow us to test GATE’s 8kN of thrust achieved by the two propellants ethanol and liquid oxygen.