NASA - National Aeronautics and Space Administration

Test Stand 303 is an insulated 11 ft diameter by 39 ft long (3.35 m diameter by 11.9 m long) horizontal carbon steel altitude chamber capable of holding propulsion systems up to approximately 64 ft (19.5 m) in length. It is capable of testing single engines or test articles with multiple engines up to 1000 lbf (4.5 kN) total thrust.



Specifications:

• Single-position, horizontal firing capability
• Altitude capability – 100 K ft (30.4 km) for engine firing with steam system; up to 250 K ft (76 km) non-firing with vacuum pumps
• Propellants: N₂H₄
• Propellant capability - 2800-gal hydrazine conditioning unit; propellant can be saturated with helium or nitrogen up to 540 psia; propellant temperature conditioned between 40 and 120 °F (4 and 49 °C); 2000-gal hydrazine dump tank
• Maximum thrust - 1 K lbf (4.5 kN)
• Maximum test article size of 7 ft diameter by 25 ft long (2 m diameter by 7.6 m long)
• 150 psig nitrogen supplied
• Shares Test Cell 302 hydrazine system
• Currently testing APU (Auxiliary Power Unit)