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booster main engine selection criteria for the liquid fly-back boosterThe Liquid Fly-Back Booster (LFBB) Program seeks to enhance the Space Shuttle system safety performance and economy of operations through the use of an advanced, liquid propellant Booster Main Engine (BME). There are several viable BME candidates that could be suitable for this application. The objective of this study was to identify the key criteria to be applied in selecting among these BME candidates. This study involved an assessment of influences on the overall LFBB utility due to variations in the candidate rocket engines' characteristics. This includes BME impacts on vehicle system weight, perfortnance,design approaches, abort modes, margins of safety, engine-out operations, and maintenance and support concepts. Systems engineering analyses and trade studies were performed to identify the LFBB system level sensitivities to a wide variety of BME related parameters. This presentation summarizes these trade studies and the resulting findings of the LFBB design teams regarding the BME characteristics that most significantly affect the LFBB system. The resulting BME choice should offer the best combination of reliability, performance, reusability, robustness, cost, and risk for the LFBB program.
Document ID
Document Type
Conference Paper
Ryan, Richard M.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Rothschild, William J.
(Boeing North American, Inc. Downey, CA United States)
Christensen, David L.
(Lockheed Martin Corp. Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
July 1, 1998
Publication Information
Publication: 1998 JANNAF Propulsion Meeting
Volume: 1
Subject Category
Spacecraft Propulsion and Power
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19990079846Analytic Primary1998 JANNAF Propulsion Meeting