ASSEMBLING AND TESTING A BREADBOARD ENGINE MADE UP OF 3-D ENGINE COMPONENTS, PROPULSION ENGINEER NICK CASE (LEFT FRONT) PHOTOGRAPHS THE INJECTOR, WHILE RYAN WALLS (FAR RIGHT), THE TEST CONDUCTOR LOOKS ON. MARTY CALVERT (LEFT BACK) AND BRAD BULLARD (RIGHT BACK) HELPED DESIGN THE TURBOPUMP AND INJECTOR, TWO OF THE MOST COMPLEX ENGINE PARTS TESTED.