This is the final report for the Pressure Fed Technology Program. It details the design, fabrication, and testing of subscale hardware which successfully characterized Liquid Oxygen Rocket Propulsion (LOX/RP) combustion for low cost pressure fed design. The innovative modular injector design is described in detail as well as hot-fire test results which showed excellent performance. The program summary identifies critical LOX/RP design issues that have been resolved in this testing, and details the low risk development requirements for low cost engines for future Expandable Launch Vehicles (ELV). Dunn, Glen M. Unspecified Center LIQUID PROPELLANT ROCKET ENGINES; PERFORMANCE TESTS; PRESSURE EFFECTS; PROPULSION SYSTEM CONFIGURATIONS; TECHNOLOGY ASSESSMENT; THRUST CHAMBERS; FABRICATION; INJECTORS; LAUNCH VEHICLES; LIQUID OXYGEN; LOW COST...