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Get Away Special (GAS)

Mission type	Various
Operator	NASA
Shuttle Small Payloads Project

Getaway Special was aNASA program that offered interested individuals, or groups, opportunities to fly smallexperiments aboard theSpace Shuttle. Over the 20-year history of the program, over 170 individual missions were flown.^[1] The program, which was officially known as theSmall, Self-Contained Payloads program, was canceled following theSpace ShuttleColumbia disaster on February 1, 2003.

The program was conceived byNASA'sShuttle program managerJohn Yardley, and announced in the fall of 1976. The "Getaway Special" nickname originated from a special vacation fare for flights between Los Angeles and Honolulu being advertised byTrans World Airlines at the time around the program's conception.

The first Getaway Special was purchased by Gilbert Moore ofThiokol on October 12, 1976,^[2] and donated toUtah State University. It was flown onColumbia during STS-4 in June/July 1982.^[3] The program was canceled after theSpace ShuttleColumbia disaster on February 1, 2003. The last Getaway Special, which was carried aboardSTS-107, was theFreestar experiment package, which carried six different experiments. Much of the data was lost whenColumbia was destroyed, but some data was transmitted during the mission.

After reorganization of the Shuttle Program, NASA cited the need for the remaining Shuttle fleet to complete assembly of the ISS to justify its decision to cancel the program. The GAS program canisters and GAS Bridge combined weight were only usable on low orbit missions, which were rescheduled with higher priority payloads. With payload and program limits set on the remaining Shuttle missions until the expected STS close-out in 2010, the GAS program was eliminated.

To assure that diverse groups would have access to space,NASA rotated GAS payload assignments among four major categories of users: educational, foreign, commercial, and U.S. government. GAS payloads had been reserved by foreign governments and individuals; U.S. industrialists, foundations, high schools, colleges and universities; professional societies; service clubs; and many others. Although persons and groups involved in space research obtained many of the reservations, a large number of spaces were reserved by persons and organizations outside the space community.

GAS requests were first approved atNASA Headquarters inWashington, D.C., by the director of the Transportation Services Office. At that point NASA screened the propriety and objectives of each request. To complete the reservation process for GAS payloads, each request was accompanied or preceded by the payment of$500. Approved requests were assigned an identification number and referred to the GAS team at theGoddard Space Flight Center inGreenbelt, Maryland, the designated lead center for the project. The GAS team screened the proposals for safety and provided advice and consultation on payload design. It certified that proposed payloads would be safe and would not harm or interfere with the operations of the space shuttle, its crew, or other experiments on the flight. The costs of any physical testing required to answer safety questions before launch were borne by the GAS customer.

There were no stringent requirements to qualify for participation in the GAS program. However, eachpayload was required to meet specific safety criteria, have been screened for its propriety, as well as being evaluated for its educational, scientific or technological objectives. These guidelines preclude commemorative items, such as medallions, that are intended for sale as objects that have flown in space.NASA'sSpace Shuttle program had specific standards and conditions relating to GAS payloads. Payloads were required to have fit into NASA standard containers and weigh no more than 200 pounds (91 kg). Two or more experiments could have been included in a single container if they fit while not exceeding weight limitations. The payload must have been self-powered, as experiments could not draw on the Shuttle orbiter's electricity. In addition, the crew's involvement with GAS payloads was limited to six simple activities (such as turning on and off up to three payload switches), due to the fact that crew activity schedules do not provide opportunities to either monitor or service GAS payloads in flight.

The cost of this unique service depended on the size and weight of the experiment. Getaway specials of 200 pounds (91 kg) and 5 cubic feet (0.14 m³) cost$10,000; 100 pounds (45 kg) and 2.5 cubic feet (0.071 m³), $5,000; and 60 pounds (27 kg) and 2.5 cubic feet (0.071 m³), $3,000. The weight of the GAS container, experiment mounting plate and its attachment screws, and all hardware regularly supplied by NASA was not charged to the experimenter's weight allowance.

The GAS container provided internalpressure, which could be varied from nearvacuum to about oneatmosphere. The bottom and sides of the container were alwaysthermally insulated, and the top may have been insulated or not, depending on the specific experiment. A lid that could be opened, or one with a window, may be required, and were offered as options at additional cost. The GAS containers were made ofaluminum, and the circular end plates are⁵⁄₈ inch (16 mm) thick aluminum. The bottom 3 inches (76 mm) of the container were reserved for NASA interface equipment, such ascommand decoders andpressure regulating systems. The container was a pressure vessel that could be evacuated before or during launch, or on orbit, and could be re-pressurized during re-entry, or on orbit, as required by the experimenter.

The getaway bridge, which was capable of holding 12 canisters, made its maiden flight onSTS-61-C. The aluminum bridge fit across the payload bay of the orbiter and offered a convenient and economic way of flying several GAS canisters.

• STS-7 -Pugas
• STS-40 -G-616 Cosmic Radiation Effects on Floppy Disks
• STS-47 -Project POSTAR
• STS-61-C - 1986: Vertical Horizons (G-481)
  • Ellery Kurtz, artist, and Howard Wishnow, Project Coordinator. An art conservation experiment on board theSpace ShuttleColumbia. Included in the canister as part of the experiment were four original oil paintings by Kurtz, and other artistic materials, in order to evaluate the effects of spaceflight on fine art materials.
• STS-91 - June 2, 1998 (G-743)^[5]

Reference for this table:^[6]

• Hitchhiker Program - program run by the same office as the GAS Program (SSPP)
• Space Shuttle

• NASA programs
• Space Shuttle program
• University of Michigan

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