1. Page 1 Engine Discussion 11/4/2015

2. Page 2 One Possible Valve Actuation Concept Friction Clutch Variable Speed Rotary Actuator Ball Valves Launch Rail Hex Drive Shaft Actuator attaches to Launch Rail Drive shaft remains attached to rotary actuator Drive shaft disengagement coupling Actuator Requirements: Speed – 20 to 200 RPM Torque – TBD Output shaft configuration - TBD

3. Page 3 Big Questions: How do we adapt gearbox shaft to valve? Where do we put rotational stop? At valves At input shaft? How do we keep as simple and safe as possible (Inadvertent actuation) 2:1 or 1:1 gear box gear ratio? Torque requirement (plan for big margin) Do we need to include a coupling between gear box and valve? Do we need to thermal isolate gear box? What happens as gearbox gets cold How do we test the system? Keep it simple, robust, safe

4. Page 4 Requirements: No NPTs Ox compatible Metallic built-in rotation stops Length TBD ¼” inlet/outlet Others?

5. Page 5 LOX, Ethanol Valve (Flight) Should be available from McMaster Carr

6. Page 6 Right Angle Drive

7. Page 7

8. Page 8

9. Page 9 LOX Feed Line Details LOX Valve Outlet LOX Injector Inlet

10. Page 10 Ethanol Feed Line Detail Ethanol Tank Outlet Ethanol Valve Inlet