Accession Number:

ADA244465

Title:

Orbit Transfer Rocket Engine Technology Program. Automated Preflight Methods Concept Definition. Task E.7

Descriptive Note:

Final rept.

Corporate Author:

ROCKWELL INTERNATIONAL CANOGA PARK CA ROCKETDYNE DIV

Personal Author(s):

Report Date:

1991-12-21

Pagination or Media Count:

109.0

Abstract:

Orbit transfer engine preflight requirements were defined and a range of possible preflight methods were proposed. Critical issues and benefits were also identified for each method and technology readiness and development costs addressed. It would be advantageous in a space based setting to minimize or entirely eliminate preflight engine checkouts requiring manualextravehicular interaction with the hardware. This study investigated the possibility of automating these checkouts. The minimum requirements in terms of information and processing necessary to assess the engines integrity and readiness to perform its mission were first defined. A variety of ways of remotely obtaining that information, spanning a range of method sophistications were then generated. The sophistication of these approaches varied from a simple preliminary power up, where the engine is fired up for a short time, to the most advanced approach where the sensor and operational history data system alone indicates engine integrity. Critical issues and benefits of each of these methods were also identified, outlined, and prioritized. The technology readiness of these automated preflight methods were then rated on a NASA Office of Exploration Scale used for comparing technology options for future mission choices. Finally estimates were made of the remaining cost to advance the technology for each method to a level where the system validation models have been demonstrated in a simulated environment.

Subject Categories:

  • Rocket Engines
  • Astronautics
  • Manned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE