Shear Explosive Bolt

Signals originating in the instrument unit initiate the sequence, although deployment can be conmanded from the ground. Pyrotechnic devices, stored high-pressure gas, electrically driven devices, and mechanical devices such as springs are used to supply the force necessary to effect the deployments. Some of the deployed elements are shown in figure 4-6. C. Solar array beam fairing D arasol thermal shield E. Solar observatory solar rray F. Rendezvous and ranging antenna C. Solar observatory C....

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Brief (fraction of second) increase in particulate column density Urge flux of condensable materials. Liquid vents produce large column densities of particles, thus producing high background light scatter (particles clear within 15 minutes). Debris from experiment vent can cause Increased background light or cause false stars. Slight increase in molecular coluirn densities (clearing In less than IS minutes). Airlc.k condensate system vent (contingency) Particles from liquid vent can increase...

Info

Check valve in the discharge line to prevent backflow when the pump is nor running. A heat exchanger having parallel flow paths to accommodate coolant from both laboratory cooling loops maintains the water below 78 F. A tank containing about 12 pounds of water is pressurized with nitrogen to 5 psia to maintain pump iniet pressure and to provide additional water in the event of leakage. Despite a problem with gas (8.4.1), this system fulfilled its functional requirement to maintain temperatures...

Bmz

Heat sink plate Figure 10-18.- Urine drawer schematic. during its first use. This las corrected by installing a fecal bag in the fecal receptacle to provide the proper airflow pressure differential between the fecal and urine collection receptacles. Low airflow was reported once in urine drawer 3, and changing the separator filter restored normal airflow. During the scheduled replacement of a centrifugal separator at the end of the second manned period, the crew found that a suction line seal...

Section Configuration

This section presents some pertinent background information that affected the Saturn Workshop's configuration and an overall description of that configuration. It is a guide to the vehicle's general arrangement and size and, to a small degree, explains how it developed. Many factors influenced the design, and an important one, economics, led to an early decision to use hardware, where possible, that had been developed for other programs, especially the Apollo lunar program. This resulted first...

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Johnson Space Center Skylab Mission Report, Second Visit, JSC-08662, January 1974. 17. Johnson Space Center Skylab Mission Report, Third Visit, JSC-08963, July 1974. 18. Marshall Space Flight Center MSFC Skylab Program Engineering and Integration Final Report, NASA TM X-64808, July 1974. 19. Marshall Space Flight Center MSFC Skylab Corollary Experiments Final Technical Report, NASA TM X-64809, August 3974. 20. Marshall Space Flight Center MSFC Skylab Airlock Module Final Technical Report,...

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_ ith Uic cAC.epi.Uf1 r ft> e ilc ' ranaierert orparVcnt floor orea ForwarJ corejarL -t floor - oten r _ Crex cjarters iirti-.ions - close- .jrii itn tnc ion . r the caste * niQcfer< t icrr-arlr nt partitions . Cre* < wertc> s ceilir.j - open yi i exception f tne aste r-jnage en iartw* ceilina area _ ith Uic cAC.epi.Uf1 r ft> e ilc ' ranaierert orparVcnt floor orea ocser uor- console platf in- faut . restraint c locations or t'atforr fool restraint msi idiiai 'leploycent Techanisnj ep...

Laboratory Thermal Control

Insulation, surface coatings, and other passive elements perform a major role in keeping temperatures within the laboratory at acceptable values. The basic insulating materials are fiberglass reinforced polyurethane foam, fiberglass, and multilayer insulation fig. 8-1 . Fiberglass curtains on the airlock both Insulate it and protect against penetration by micrometeoroids. The mete-oroid curtain has an off-white fiberglass cloth exterior facing and is gold coated on the other facing. Emittance...

Induced Atmosphere

The atmosphere surrounding Skylab is composed of the Earth atmosphere at tli at orbital altitude and the molecular material and particles emitted by the vehicle. The ambient atmosphere at an altitude of 435 kilometers consists primarily of atomic and molecular oxygen and molecular nitrogen, with an average density of 4 x 10-15 g mS, which has a negligible effect on Saturn Workshop operations. The major sources of the artificial or induced atmosphere are outgassing of nonmetal.'lc materials,...

Solar Observatory Thermal Control

The solar observatory was originally designed for independent operation and so it has an autonomous system for controlling temperatures. To regulate temperatures satisfactorily required independent consideration of each of the three major divisions of the solar observatory the Instruments, the instrument canister, and the rack fig. 8-11 . The rack electrical and mechanical components are thermally controlled within desired temperature limits by means of a combination of selective equipment...

Nasa Tm X-64844

Marshall Space Flight Center, Leland F. Belew and Ernst Stuhlinger Skylab A Guidebook, EP-107, U. S. Government Printing Office, Washington, D.C., 1973. 2. Marshall Space Flight Center MSFC Skylab Mission Sequence Evaluation Report, NASA TM X-64816, March 1974. 3. Marshall Space Flight Center MSFC Skylab Attitude and Pointing Control System Mission Evaluation Report, NASA TM X-64817, July 1974. 4. Mai shall Space Flight Center MSFC Skylab Electrical Power System Mission Lvaluation Report,...

Inflight Iaintenance

The feasibility of performing inflight maintenance, and .he value of this capability, was effectively demonstrated as successful repairs during the first manned period in effect saved the mission. Procedures and hardware were developed on the ground, and crewmen practiced in trainers and the neutral buoyancy simulator to perform tasks which had been considered impractical or infeasible prior to the mission. The continuing degradation or failure of certain equipment also resulted in the planning...

Section Attitudi And Pointing Control

Control Moment Gyro Block Diagram

The Saturn Workshop was designed with no major articulating elements because of the use of existing hardware, cost limitations, and other development considerations. The fixed solar arrays, antennas, and experiment mounts made attitude control very important for general orientation. Some experiments required reasonably precise orientation and stability, and the solar observatory required a very precise pointing control. Many techniques were available for attitude maneuvering and stabilization...