The AGM-69A Short
Range Attack Missile.
The AGM-69A Short Range
Attack Missile was developed almost in parallel with the
FB-111A program. Boeing undertook studies beginning in 1963
in December 1963 towards a Short Range Attack Missile and
coincidentally, the USAF developed the following year
SOR-212 resulting in the drafting of Weapons System 104A
stipulating such a weapon offering a rocket-assisted range
of 100nm. With its head start, Boeing won the contract on 31
October 1966 and live firings (with inert warheads) were
underway in the summer of 1969. Initially SRAM equipped
B-52s only but studies proved that the FB-111A would be an
excellent launch platform because of its more accurate INS
and more stable, high speed flight performance.
The AGM-69A was a solid
rocket-boosted 2,230lb, 14ft long, Mach 3 missile with a
maximum stand-off range of up to 100 miles. The million
dollar SRAM was a 'smart missile' equipped with a Delco
computer and a Singer-Kearfott KT-76 inertial measurement
unit (IMU). For attack, the navigator would select stores
stations using a new push-button array on his right console,
including a special SRAM master control panel to select the
delivery mode for that weapon.
The FB-111A entered the SRAM
program when the Category II trials "FB", No.5, flew with
polka-dotted test SRAMs. The first supersonic launch was
accomplished on 22 September 1970. Called "Bullet Blitz",
Category III test operations for the FB-111/SRAM weapon
system took place from Pease AFB, NH. The mission was
monitored and directed by SAC's 4201st Test Squadron, a
tenant unit at Pease AFB. Category III is one of three test
stages that any weapon system undergoes before it is
considered operational when it is placed under controlled
conditions in its daily operational environment. The first
task of the the test force was to do Cat.III testing for the
FB-111A itself and later expanding it to cover the
FB-111A/SRAM combination. Cat.III tests for the "FB" started
in 1 October 1971 and were completed by 31 July 1972,
requiring 1,812 sorties totaling 8,082 hours of flying
time.
Live versions of the AGM-69A
joined the FB-111A force in 1973.The 509th BMW joined in
Project "Bullet Blitz", a serie of captive flight tests
culminating in seventeen launches at the White Sands missile
range in New Mexico. The 715th BMS was the first squadron to
perform a fully successful live launch on 2 April 1974.
Annual SRAM launches were conducted subsequently with a
limited stock of missiles, meaning two per year for the
whole FB-111A community.
Alert FB-111As could carry
up to six SRAM but a maximum of four was more typical; two
in the weapons bay and two more on the inboard wing pivot
pylons (stations 4 and 5). Live versions of the AGM-69A were
fitted with a near-common W69 warhead which packed a
200-kiloton yield. SRAM internal carrying was restricted
because the Air Force did not buy sufficient quantities of
MAU-140 Ejector Rack Adapters to outfit all 76
aircraft.
Total number of operational
AGM-69A was 1140 from 1975 to 1986 with SRAM inventory
peaking at 1471 in 1975. The weapon was withdrawn from
FB-111A alert use on 7 June 1990 under the express orders of
Defense Secretary Richard B.Cheney.
SRAMs were stored in the
Weapons Storage Area located across the active runway. The
WSA was manned by the Munitions Maintenance Squadron's
Integrated Munitions Maintenance and Storage branch. Six
shops made up the IMMS. They were verification and checkout,
missile checkout, weapons maintenance, conventional
munitions maintenance, equipment maintenance and storage and
handling. The IMMS was responsible for maintaining the
equipment that electronically verifies the SRAM's electrical
systems. The missile checkout section's responsibilities
lied in maintaining the entire SRAM fleet and all FB-111A
carrier aircraft equipment. The weapons maintenance section
consisted of two separate sections, one responsible for the
SRAM and the other responsible for the gravity-type weapons.
The primary responsibility for the condition of these
munitions rested with these sections. The equipment
maintenance section maintained the trailers and associated
support equipment used to move the weapons. Finally, the
storage and handling section was tasked with the movement of
weapons.
|