Hitchhiker Experiments
Hitchhiker experiments were housed in canisters or attached to mounting plates. The Hitchhiker canister came in two varieties--the Hitchhiker Motorized Door Canister and the Sealed Canisters. The Hitchhiker Motorized Door Canister had mechanical interfaces nearly identical to a GAS canister and could accommodate a customer payload of up to 160 pounds (72.6 kilograms). This canister allowed a payload to be exposed directly to the environment of space.
The Sealed Canister, without a door, could accommodate a customer payload up to 200 pounds (90.7 kilograms). The payload in this canister was sealed in an atmosphere of nitrogen or air.
Experiments attached to mounting plates could be placed on the vertical plate, a 25 inches (63.5 centimeters) by 39 inches (99.1 centimeters) mounting surface for up to 200 pounds (90.7 kilograms) of customer hardware. A larger mounting plate measured 50 inches (127 centimeters) by 60 inches (152.4 centimeters). This plate, available for use on the side-mount carrier, was for larger experiments or hardware requirements. Customer hardware mounted on plates may have needed additional customer-provided thermal control provisions, such as heaters or blankets.
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