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ASRM.TXT
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1993-02-05
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"6_2_15_10.TXT" (4905 bytes) was created on 05-02-89
Enter {V}iew, {X}MODEM, {Y}MODEM, {K}ERMIT, ? for HELP, or {M}enu [V]...
ADVANCED SOLID ROCKET MOTOR (ASRM) PROJECT
The Advanced Solid Rocket Motor project is intended to
substantially improve the flight safety, reliability and
performance of the Space Shuttle's Solid Rocket Boosters for the
many years in the future that the Shuttle will remain a principal
U.S. launch vehicle.
Key objectives of the project are to achieve significant
improvements over the current Redesigned Solid Rocket Motor in
the areas of:
o Flight safety design margins;
o System reliability, through enhancements in motor quality
and reproducibility;
o Booster performance, along with the related aspect of
Shuttle payload capacity; and
o Reduced overall program cost, through increased efficiency.
In terms of performance, the Shuttle's projected 12,000-
pound extra lifting capability with the new motors will enable
additional payload deliveries equivalent to 2.4 Shuttle missions
per year, above the currently planned maximum of 14 per year.
In addition to improved safety, reliability and performance,
the next-generation booster project promises several broad
national benefits. For example, it will strengthen the nation's
existing technology foundation as a base for future advances in
solid fuel propulsion. It will help promote a competitive solid
rocket motor industry and reduce Shuttle operational costs.
Substantial improvements are possible because of great
technological progress made by the solid rocket motor industry
since the current Shuttle booster was designed. Some of the most
significant strides have been in process control technology and
automation, which enable achieving a high degree of product
reproducibility and reliability.
These improvements will be incorporated in modern production
facilities that are to be built for the Advanced Solid Rocket
Motor project and which will have a capacity of producing up to
30 motors per year. The facilities are planned for construction
at the Yellow Creek site in extreme northeastern Mississippi,
which is NASA's preferred site for the hardware production.
Additional specialized facilities will be built at the John
C. Stennis Space Center near Bay St. Louis, Miss., NASA's
preferred location for ground testing of the motors. It also is
planned that part of the effort will use NASA's existing
facilities at the Michoud Assembly Facility near New Orleans.
The Advanced Solid Rocket Motor development program is
expected to take approximately 5 years, with first use of the new
motors in a Shuttle flight possible by 1994. The cost of design
and development is estimated at just under $1 billion, exclusive
of facility costs, which are estimated at between $200 and $300
million. The design and development cost will include delivery
of rocket motors for six Shuttle missions (which will save $170-
180 million currently being paid for the old-technology motors).
Marshall Space Flight Center in Huntsville, Ala., manages
the Advanced Solid Rocket Motor program for NASA.
Evolution of ASRM
Since 1977, the Space Shuttle has consisted of a manned
reusable orbiter, an expendable external tank for its liquid
propellants, and two recoverable and reusable solid rocket
boosters. Each booster comprises several subsystems, the largest
of which is the solid rocket motor with its igniter and nozzle.
In 1986, following the Challenger accident, NASA contracted
for a redesigned solid rocket motor, which would incorporate a
number of design changes determined to be necessary before the
Shuttle could return to flight. The redesign effort was oriented
toward providing a motor that is safe to fly, while at the same
time keeping impact to the Shuttle launch schedule at a
minimum. Therefore, the redesign was based on use of existing
hardware wherever possible, without compromising safety.
To meet its longer-term solid rocket motor requirements,
NASA in March 1987 presented to Congress an acquisition strategy
and plan. The plan analyzed three options: recompeting the
redesigned solid rocket motor; continuing single-source
procurement of the redesigned motor; or proceeding with an
Advanced Solid Rocket Motor, which had already been the subject
of NASA-funded studies by industry.
NASA recommended the third option, and in October 1987,
through the NASA Authorization Act of 1988, Congress indicated
its approval for that approach. In March 1988, NASA published an
acquisition plan detailing how it would implement the Advanced
Solid Rocket Motor program. With issuance of the request for
proposals in August 1988, the procurement began in earnest.
Evaluation of proposals has been under way since November 1988,
and selection of a prime contractor is expected to be announced
this month (April 1989).
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