Large Altitude Simulation System (400 Area)

    The Large Altitude Simulation System (LASS) in the WSTF 400 Area is comprised of a three-module chemical steam generator that powers large two-stage ejector sets of the altitude simulation system. Optimization of the entire steam system to engine requirements is achieved by the configuration of the number of modules fired, the replaceable nozzles and throat sections of the large ejectors, and the interchangeable diffusers.

    Altitude Capability:

    • Provides a start altitude of ~ 35,000 m (115,000 ft)
    • Maintains Test Stands 401, 403, or 405 at > 30,500 m (100,000 ft) during a rocket engine firing
    • Supports substantially higher thrust levels when testing solid rocket motors (Test Stand 405)

    Each module:

    • Produces 82 kg/s (180 lb/s) of steam at 2 MPa (290 psi), 277 °C (530 °F)
    • 233 MW (~ 23,800 Bhp)
    • Consumes 17 L/s (270 gal/min) liquid oxygen
    • Consumes 11 L/s (170 gal/min) isopropyl alcohol
    • Vaporizes 57 L/s (900 gal/min) water

    Duration and thrust level maximum:

    • One module: 105 min at 18 kN (4,000 lbf)
    • Two modules: 70 min. at 33 kN (7,500 lbf)
    • Three modules: 35 min. at 67 kN (15,000 lbf)

    Available diffuser sizes limit maximum engine nozzle diameter:

    • 77 in. (196 cm) vertical (2)
    • 62.5 in. (159 cm) vertical (1)
    • 44.5 in. (113 cm) horizontal (1)
    • 36 in. (91 cm) vertical (2)
    • 36 in. (91 cm) horizontal (1)

    For additional information, contact David L. Baker, Chief, Propulsion Test Office, (575) 524-5605, or Kevin Farrah, Altitude Simulation Systems Manager, (575) 524-5160.