- Endeavour (9)
- Pad 39-A (55)
- 71st Shuttle Mission
- 102nd US Manned Mission
- 9th Flight OV-105
- 30th Shuttle EVA
- 10th Rollback
- NOTE: Click Here for Countdown Homepage
- David M. Walker (4), Commander
- Kenneth D. Cockrell (2), Pilot
- James S. Voss (3), Payload Commander
- James H. Newman Ph.D.(2), Mission Specialist 2
- Michael L. Gernhardt (1), Mission Specialist 3
- OPF -- 3/28/95
- VAB -- 6/28/95
- PAD -- 7/05/95
- VAB -- 08/1/95
- PAD -- 08/8/95
- (Reference KSC Shuttle Status Jul 1995)
- (Reference KSC Shuttle Status Aug 1995)
- ( KSC Shuttle Status Sep 1995)
- SPARTAN 201-03, WSF-2, IEH-01, CAPL-02/GBA, EDFT-02, MSX-02, STL/NIH-C-04, CGBA-03, BRIC-06, EPICS, CMIX-04, G-726
Click here for Press Kit
Click here for Additional Info on STS-69
- The 11-day mission will feature the second flight of the Wake
Shield Facility (WSF), a saucer-shaped satellite that will fly free of
the Shuttle for several days. The WSF will grow thin films in a near
perfect vacuum created by the wake of the satellite as it it moves
through space. The crew also will deploy and retrieve the Spartan 201
astronomy satellite, perform a six-hour spacewalk to test assembly
techniques for the international Space Station and test thermal
improvements made to space suits used during space walks.
- The Spartan 201 free-flyer will be making its third flight aboard
the Shuttle. The Spartan 201 mission is a scientific research effort
aimed at the investigation of the interaction between the Sun and its
outflowing wind of charged particles. Spartan's goal is to study the
outer atmosphere of the Sun and its transition into the solar wind
that constantly flows past the Earth.
- STS-69 will see the first flight of the International Extreme
Ultraviolet Hitchhiker (IEH-1), the first of five planned flights to
measure and monitor long-term variations in the magnitude of absolute
extreme ultraviolet (EUV) flux coming from the Sun, and to study EUV
emissions from the plasma torus system around Jupiter originating from
its moon Io.
- Also flying aboard Endeavour will be the combined Capillary
Pumped Loop-2/Gas Bridge Assembly (CAPL-2/GBA) payload. This
experiment consists of the CAPL-2 Hitchhiker payload designed as an
in-orbit microgravity demonstration of a cooling system planned for
the Earth Observing System Program and the Thermal Energy Storage-2
payload, part of an effort to develop advanced energy generation
techniques. Also a part of this payload are several Get Away Special
(GAS) experiments which will investigate areas such as the interaction
of spacecraft attitude and orbit control systems with spacecraft
structures, fluid-filled beams as structural dampers in space and the
effects of smoldering combustion in a long-term microgravity
- Another payload being flown with a connection to the
development of the Space Station is the Electrolysis
Performance Improvement Concept Study (EPICS). Supply of
oxygen and hydrogen by electrolyzing water in space will play
an important role in meeting NASA's needs and goals for
future space missions. On-board generation of oxygen is
expected to reduce the annual resupply requirement for the
Space Station by approximately 12,000 pounds.
- Other payloads aboard are the National Institutes of Health-
Cells-4 (NIH-C4) experiment that investigates bone loss during
space flight; the Biological Research in Canister-6 (BRIC-6) that
studies the gravity-sensing mechanism within mammalian cells. Also
flying are two commercial experiments. (CMIX-4) whose objectives
include analysis of cell change in microgravity along with studies of
neuro-muscular development disorders and the Commercial Generic
Bioprocessing Apparatus-7 (CGBA-7). CGBA is a secondary payload that
serves as an incubator and data collection point for experiments in
pharmaceuticals testing and biomedicine, bioprocessing and biotechnology,
agriculture and the environment.
- The Thermal Energy Storage (TES-2) experiment also is
part of the CAPL-2/GBA-6. The TES-2 payload is designed to
provide data for understanding the long-duration behavior of
thermal energy storage fluoride salts that undergo repeated
melting and freezing in microgravity. The TES-2 payload is
designed to study the microgravity behavior of voids in
Lithium Fluoride-Calcium Fluoride eutectic, a thermal energy
storage salt. Data from this experiment will validate a
computer code called TESSIM, useful for the analysis of heat
receivers in advanced solar dynamic power system designs.
- Thursday, September 7 at 11:09:00.052 am EDT. The launch window was
2 hours 30 min. Solid Rocket Boosters (SRB's) seperation
successful. At 7min 45sec SSME throttled back whileEndeavour
traveling at more than 4miles per sec and 640 miles downrange.
SSME cutoff confirmed at 8min 30sec.
- Operations to load the External Tank began at 2:20am
9/7/95 and were completed at 5:15am. The crew suited up at 7:30am EDT
and left the Operations and Checkout Building (O&C) at 7:58am EDT. The
crew arrived at launch Pad 39-A at 8:10am EDT. The hatch was closed
and sealed but failed to pass its leak check at 9:50am EDT. The crew
hatch was reopened and the seals checked. Then a retest was performed.
Another problem late in the count was with Water Spray Boiler # 2.
The Water Spray Boilers normally pressurize to 39 PSI but unit #2 showed
a pressure of 38.7 PSI. This did not violate any Launch Commit Criteria
and the Mission Management Team determined the lower pressure was not a
constraint to launch. Also, there was a minor problem with a "safe"
talkback indicator on a safe and arm device on the Solid Rocket Booster.
This problem has been seen before and is understood. It was not expected
to be of any concern to the Solid Rocket Booster Recovery team.
- Earlier in the launch flow, Endeavour's Fuel Cell #2 was replaced and
the countdown picked up on September 4, 1995 at 4:30pm at the T-41.5 hour mark
(Reference KSC Shuttle Status 9/01/1995) and (Reference KSC Shuttle Status 9/05/1995).
- The Mission Management Team (MMT) decided to scrub the August 31,
1995 scheduled launch of Endeavour on mission STS-69 due to a failure
of one of three fuel cells aboard the vehicle. The scrub was called
at 3:30am on 8/31/95 prior to tanking operations. Fuel cells provide
electricity to the vehicle while in orbit. Mission rules state all
three fuel cells must be up and operational prior to launch.
- At the 10:30am press conference on 8/31/95, Bob Sieck estimated the
countdown would pick back up on Monday with a launch late in the week.
The scrub was called due to a temperature spike in the Fuel Cell #2
exit temperature. The fuel cell is located in the right side of the
payload bay. Fuel cell #2 had 1700 hours of operation and cells are
typically kept in service until 2400 hours of operation. A similar
fuel cell problem was previously detected on orbit during the Spacelab
D-1 mission STS-61A and on the launch pad during STS-6. During STS-6,
the fuel cell was replaced on the pad and similar procedures will be
used for STS-69.
- The countdown had begun at 3pm EDT on 8/28/95.
(Reference KSC Shuttle Status 8/29/1995). The previous launch date of 11:04am
8/31/95 was decided after NASA officials held a Flight Readiness
Review to consider remaining issues in preparing Endeavour for the
flight. Among the items reviewed and closed out was the issue of
minor O-ring erosion seen in a joint of the Reusable Solid Rocket
Motor (RSRM) nozzle during the last two Shuttle launches.
- The launch was previously placed on hold pending analysis of the
solid rocket booster (SRB) nozzle o-ring seals. Possible air paths
in the RTV behind the RSRM Nose Inlet Assembly to Throat Assembly joint
were investigated. (Reference KSC Shuttle Status 8/23/1995).
- There was a rollback of Endeavour on 8/1/95 to the VAB due to
Hurricane ERIN. (Reference KSC Shuttle Status 8/01/1995). Endeavour was
returned to Pad 39-A on 8/08/95 with first motion occuring at 1:55am.
(Reference KSC Shuttle Status 8/08/1995).
- Old launch date was August 5, 1995 at 10:45am with a 2 hours 30 minute
launch window. Launch date was pending resolution of open items including
the post flight assessment of an anomaly on one of the STS-71
solid rocket booster nozzle joints. (Reference KSC Shuttle Status 7/25/1995)
- Rollout to Launch pad 39-A occured on 7/5/95 with first motion out of
the Vehicle Assembly Building (VAB) at around 11 p.m. The Vehicle was hard
down on the pad at about 4:30am on 7/6/95. Hot fire of auxiliary power
units APU units 2 and 3 occured on 7/6/95.
(Reference KSC Shuttle Status 7/06/1995)
- Altitude: 190 statute miles
- Inclination: 28.4 degrees
- Duration: 10 days, 20 hours, 28 minutes, 55 seconds.
- Distance: 4.5 million miles
- SRB: BI-074
- ET : SN-72
- MLP :
- SSME-1: SN-2035
- SSME-2: SN-2109
- SSME-3: SN-2029
- At KSC September 18, 1995 at 7:37:56am EDT. KSC Shuttle Landing Facility
Runway 33 (south-east to north-west). Sonic booms at 7:35am EDT. Banking
right-hand turn of 270 degrees. Main landing gear touchdown at Mission
Elapsed Time of 10days 20hr 28 56sec. Nose gear touchdown at MET
10days 20hours 29min 8 sec with Wheel Stop at 10 days 20hr 29min 52 sec
or 7:38:52 EDT.
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Last Updated Friday June 29 11:21:14 EDT 2001
Jim Dumoulin (Redacted)