Accession Number:

AD0272694

Title:

DESIGN AND DEVELOPMENT OF A VAPORJET ATTITUDE-CONTROL SYSTEM FOR SPACE VEHICLES

Descriptive Note:

Corporate Author:

AMERICAN RADIATOR AND STANDARD SANITARY CORP MOUNTAIN VIEW CALIF

Personal Author(s):

Report Date:

1961-12-01

Pagination or Media Count:

1.0

Abstract:

Research and development efforts on a lightweight, long-lived, jet-thrust-reaction, attitude-control system of high reliability for space-vehicle applications are summarized. In this system, termed Vaporjet, desired characteristics are obtained through low-pressure storage of propellant in its liquid state, with conversion at saturation pressure to vapor of high specific impulse and through employment of solidstate control circuitry. Force levels of 0.1 and 0.001 lb are actuated by signals from vehicle rate and attitude sensors to eliminate rates greater than 0.001 radiansec and errors greater than 0.5 degree. Water vapor having a calculated specific impulse of about 130 sec was chosen as the low-thrust fuel, using porous Teflon to effect phase separation at all gravity conditions. Saturated propyl-acetate vapor conained by a butyl diaphragm was employed to pressurize liquid water against heaters and Teflon. Propane, with a calculated specific impulse of 69 sec, was selected for high-thrust fuel because of its lower latent heat phase separation was unsuccessful. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE