[FPSPACE] P6 Development Events List

[Dennis Newkirk]

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ISS Assembly flight 4A carries the P6 Truss to the International Space
Station. Below is an abbreviated list of developmental events of the
components and the assembly itself. For more information on this and other
ISS major components see the International Space Station Guide
(http://www.mcs.net/~rusaerog/iss/ISS.html)
---

NASA has completed two shipments of solar panel modules consisting of 45
solar panel modules that were developed for the Mir cooperative solar array
project, precursors to the ISS solar arrays. (Space Station This Week,
January 10, 1995, Boeing)

A motor drive assembly test article was delivered by Lockheed/Honeywell to
Rocketdyne for integrated electrical system testing. This assembly is used
to deploy and retract the solar array assembly on the solar power module.
(Space Station This Week, December 19, 1994, Boeing)

An Active Thermal Control System radiator panel qualification unit is
currently undergoing fabrication at Loral Vought Systems in Dallas. (Space
Station This Week, February 6, 1995, Boeing)

Honeywell Durham, has completed qualification testing of the Solar Array
Motor Drive Assembly. (Space Station This Week, February 20, 1995, Boeing)

The first flight solar array wing motor drive assembly (MDA) was delivered
to Lockheed Missiles and Space Company after completing acceptance testing.
The MDA controls the actuation of the latches on the solar array blanket
box which is the first step in deploying the solar arrays.(Space Station
This Week March 13, 1995, Boeing)

Fluid Quick Disconnect Coupling (FQDC) components were delivered to
subcontractors, this week to support testing on the pump flow control
subassembly (PFCS) and photovoltaic (PV) radiator. The components are dual
fluid passageway valves featuring four internal ball valves which prevent
ammonia leakage when the passive and active halves are separated during
maintenance of the PFCS or PV radiator. (Space Station This Week, April 11,
1995, Boeing)

Functional development tests of the Beta Gimbal Deployment Transition
Structure (BGDTS) were successfully completed at Rocketdyne. The structure
deploys the solar array and beta gimbal assembly about eight feet, clearing
the PV module and allowing for a full 360 degree rotation of the solar
arrays. The test demonstrated the capability of the BGDTS passive spring
and damper mechanism to control the speed and path through which the solar
array and beta gimbal assembly travels during deployment. (Space Station
This Week, April 11, 1995, Boeing)

The E-wing assembly--the massive solar panel test unit--was completed in
April 1996 and was successfully deployed and retracted several times
earlier this month.(MIR COOPERATIVE SOLAR ARRAY IS DEPLOYED/ISS POWER
HARDWARE BEING BUILT AND TESTED,Michael Braukus,NASA Headquarters,
Washington, DC, May 25, 1996, RELEASE: 96-107)

Verification tests on EVA assembly and maintenance regimes for photovoltaic
(PV) module were completed by Rocketdyne at the Marshall Space Flight
Center (MSFC) Neutral Buoyancy Simulator (NBS) May 24. (Space Station This
Week, June 12, 1995, Boeing)

Solar array mast canister qualification testing was successful. The test
sequence included the full range of environmental tests such as functional,
acoustic, thermal, static, structural (in both the stowed and on-orbit
configuration) and life cycle testing. (Space Station This Week, June 27,
1995, Boeing)

Several tests were completed last week in Rocketdyne's Space Power
Electronics Laboratory (SPEL) using two solar array panels in conjunction
with the engineering model Sequential Shunt Unit (SSU). (Space Station This
Week, August 1, 1995, Boeing)

Fabrication and assembly of the first flight solar array mast canister was
completed. (Space Station This Week, August 7, 1995, Boeing)

The first flight solar array mast canister was delivered. (Space Station
This Week, March 4, 1996, Boeing)

Testing of the Solar Array E-Wing qualification unit was underway. The mast
and a blanket assembly was extended and retracted 84 times, and the
individual solar panel circuits were be flash-tested with simulated
sunlight to verify their output power.(Space Station This Week, July 2,
1996, Boeing)

The Integrated Equipment Assembly was shipped in various boxes on a flatbed
semi-tractor trailers from Rocketdyne's PG-2 manufacturing site in Canoga
Park, Calif. and delivered to the Space Station Processing Facility on Feb.
3. (Space Station This Week, February 24, 1997, Boeing)

The thermal balance test, five separate thermal and electrical (heat load)
tests, on an qualification unit Integrated Equipment Assembly was
successful were performed. (Space Station This Week, March 31, 1997, Boeing)

A qualification unit IEA, solar arrays, photovoltaic radiators and ORU's
was fully assembled and undergoing electromagnetic interference
testing.(Statement of Daniel S Goldin Administrator National Aeronautics
and Space Administration, before the, Subcommittee on Science, Technology
and Space Committee on Commerce, Science and Transportation United States
Senate, September 18, 1997)

The Integrated Electronics Assembly, is now being outfitted at KSC with
critical components of the power system in preparation for a mid-1999
launch. (Statement of Daniel S. Goldin Administrator National Aeronautics
and Space Administration before the Subcommittee on VA-HUD-Independent
Agencies Committee on Appropriations House of Representatives, 3/12/98)
------------------------
Dennis Newkirk - rusaerog@mcs.net
Editor of the Russian Aerospace Guide http://www.mcs.net/~rusaerog
Author of the Almanac of Soviet Manned Space Flight
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 --></style><title>P6 Development Events List</title></head><body>
<div><font size="-1" color="#000000">ISS Assembly flight 4A carries
the P6 Truss to the International Space Station. Below is an
abbreviated list of developmental events of the components and the
assembly itself. For more information on this and other ISS major
components see the International Space Station Guide </font><font
color="#000000">(http://www.mcs.net/~rusaerog/iss/ISS.html<span
></span>)<font size="-1"><br>
---</font></font></div>
<div><font size="-1" color="#000000"><br>
NASA has completed two shipments of solar panel modules consisting of
45 solar panel modules that were developed for the Mir cooperative
solar array project, precursors to the ISS solar arrays. (Space
Station This Week, January 10, 1995, Boeing)<br>
<br>
A motor drive assembly test article was delivered by
Lockheed/Honeywell to Rocketdyne for integrated electrical system
testing. This assembly is used to deploy and retract the solar array
assembly on the solar power module. (Space Station This Week,
December 19, 1994, Boeing)<br>
<br>
An Active Thermal Control System radiator panel qualification unit is
currently undergoing fabrication at Loral Vought Systems in Dallas.
(Space Station This Week, February 6, 1995, Boeing)<br>
<br>
Honeywell Durham, has completed qualification testing of the Solar
Array Motor Drive Assembly. (Space Station This Week, February 20,
1995, Boeing)<br>
<br>
The first flight solar array wing motor drive assembly (MDA) was
delivered to Lockheed Missiles and Space Company after completing
acceptance testing. The MDA controls the actuation of the latches on
the solar array blanket box which is the first step in deploying the
solar arrays.(Space Station This Week March 13, 1995, Boeing)<br>
<br>
Fluid Quick Disconnect Coupling (FQDC) components were delivered to
subcontractors, this week to support testing on the pump flow control
subassembly (PFCS) and photovoltaic (PV) radiator. The components are
dual fluid passageway valves featuring four internal ball valves
which prevent ammonia leakage when the passive and active halves are
separated during maintenance of the PFCS or PV radiator. (Space
Station This Week, April 11, 1995, Boeing)<br>
<br>
Functional development tests of the Beta Gimbal Deployment Transition
Structure (BGDTS) were successfully completed at Rocketdyne. The
structure deploys the solar array and beta gimbal assembly about
eight feet, clearing the PV module and allowing for a full 360 degree
rotation of the solar arrays. The test demonstrated the capability of
the BGDTS passive spring and damper mechanism to control the speed
and path through which the solar array and beta gimbal assembly
travels during deployment. (Space Station This Week, April 11, 1995,
Boeing)<br>
<br>
The E-wing assembly--the massive solar panel test unit--was completed
in April 1996 and was successfully deployed and retracted several
times earlier this month.(MIR COOPERATIVE SOLAR ARRAY IS DEPLOYED/ISS
POWER HARDWARE BEING BUILT AND TESTED,Michael Braukus,NASA
Headquarters, Washington, DC, May 25, 1996, RELEASE: 96-107)<br>
<br>
Verification tests on EVA assembly and maintenance regimes for
photovoltaic (PV) module were completed by Rocketdyne at the Marshall
Space Flight Center (MSFC) Neutral Buoyancy Simulator (NBS) May 24.
(Space Station This Week, June 12, 1995, Boeing)<br>
<br>
Solar array mast canister qualification testing was successful. The
test sequence included the full range of environmental tests such as
functional, acoustic, thermal, static, structural (in both the stowed
and on-orbit configuration) and life cycle testing. (Space Station
This Week, June 27, 1995, Boeing)<br>
<br>
Several tests were completed last week in Rocketdyne's Space Power
Electronics Laboratory (SPEL) using two solar array panels in
conjunction with the engineering model Sequential Shunt Unit (SSU).
(Space Station This Week, August 1, 1995, Boeing)<br>
<br>
Fabrication and assembly of the first flight solar array mast
canister was completed. (Space Station This Week, August 7, 1995,
Boeing)<br>
<br>
The first flight solar array mast canister was delivered. (Space
Station This Week, March 4, 1996, Boeing)<br>
<br>
Testing of the Solar Array E-Wing qualification unit was underway.
The mast and a blanket assembly was extended and retracted 84 times,
and the individual solar panel circuits were be flash-tested with
simulated sunlight to verify their output power.(Space Station This
Week, July 2, 1996, Boeing)</font></div>
<div><font size="-1" color="#000000"><br>
The Integrated Equipment Assembly was shipped in various boxes on a
flatbed semi-tractor trailers from Rocketdyne's PG-2 manufacturing
site in Canoga Park, Calif. and delivered to the Space Station
Processing Facility on Feb. 3. (Space Station This Week, February 24,
1997, Boeing)<br>
<br>
The thermal balance test, five separate thermal and electrical (heat
load) tests, on an qualification unit Integrated Equipment Assembly
was successful were performed. (Space Station This Week, March 31,
1997, Boeing)<br>
<br>
A qualification unit IEA, solar arrays, photovoltaic radiators and
ORU's was fully assembled and undergoing electromagnetic interference
testing.(Statement of Daniel S Goldin Administrator National
Aeronautics and Space Administration, before the, Subcommittee on
Science, Technology and Space Committee on Commerce, Science and
Transportation United States Senate, September 18, 1997)<br>
<br>
The Integrated Electronics Assembly, is now being outfitted at KSC
with critical components of the power system in preparation for a
mid-1999 launch. (Statement of Daniel S. Goldin Administrator
National Aeronautics and Space Administration before the Subcommittee
on VA-HUD-Independent Agencies Committee on Appropriations House of
Representatives, 3/12/98)</font></div>

<div>------------------------<br>
Dennis Newkirk - rusaerog@mcs.net<br>
Editor of the Russian Aerospace Guide http://www.mcs.net/~rusaerog<br>
Author of the Almanac of Soviet Manned Space Flight</div>
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