NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Aerodynamics of the advanced launch system (ALS) propulsion and avionics (P/A) moduleThis paper discusses the design and testing of candidate Advanced Launch System (ALS) Propulsion and Avionics (P/A) Module configurations. The P/A Module is a key element of future launch systems because it is essential to the recovery and reuse of high-value propulsion and avionics hardware. The ALS approach involves landing of first stage (booster) and/or second stage (core) P/A modules near the launch site to minimize logistics and refurbishment cost. The key issue addressed herein is the aerodynamic design of the P/A module, including the stability characteristics and the lift-to-drag (L/D) performance required to achieve the necessary landing guidance accuracy. The reference P/A module configuration was found to be statically stable for the desired flight regime, to provide adequate L/D for targeting, and to have effective modulation of the L/D performance using a body flap. The hypersonic aerodynamic trends for nose corner radius, boattail angle and body flap deflections were consistent with pretest predictions. However, the levels for the L/D and axial force for hypersonic Mach numbers were overpredicted by impact theories.
Document ID
19920041145
Document Type
Conference Paper
Authors
Ferguson, Stan (NASA Headquarters Washington, DC United States)
Savage, Dick (Boeing Defense and Space Group Kent, WA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
AERODYNAMICS
Report/Patent Number
AIAA PAPER 92-0154
Funding Number(s)
CONTRACT_GRANT: F04701-88-C-0108
Distribution Limits
Public
Copyright
Other