STS SRBs and MPTA-ET
Beneath Pathfinder, one of the orbiter test vehicles, is the Main Propulsion Test Article External Tank (MPTA-ET). This tank was used inconjunction with several main engine tests. Attached to the MPTA-ET are two Shuttle Rocket Booster (SRB) casings, which had previously been prepared to launch polar-orbit missions from Vandenberg Air Force Base.
- Engineering Test Articles
- STS SRBs and MPTA-ET
- US Space & Rocket Center, Huntsville, Alabama