Shuttle Endeavour inside Mate-Demate Device at Kennedy Space Center
Ben Cooper  /  LaunchPhotography.com via collectSPACE.com
Space shuttle Endeavour is “soft mated” to the Shuttle Carrier Aircraft (SCA) inside the Mate-Demate Device at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida on Sept. 14.
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updated 9/15/2012 4:18:52 PM ET 2012-09-15T20:18:52

For the last time in space shuttle history, a NASA orbiter has been mounted to the top of a jumbo jet to be flown to its next destination.

For shuttle Endeavour, now sitting piggyback atop the space agency's modified Boeing 747 Shuttle Carrier Aircraft (SCA), its next and final mission is to become a museum exhibit. The spacecraft, flying aboard the aircraft, will leave at sunrise on Monday from the Kennedy Space Center in Florida for Los Angeles, where it is destined for display at the California Science Center (CSC).

"It is the youngest of our fleet, it's our baby," said Stephanie Stilson, NASA's flow director for orbiter transition and retirement, as she discussed Endeavour's soon departure. "We are letting go of our baby and turning her over to California."

Endeavour was built in the wake of the loss of space shuttle Challenger in 1986. It flew 25 missions, many to support assembly of the International Space Station, before being retired in June 2011.

Ben Cooper  /  LaunchPhotography.com via collectSPACE.com
The nose landing gear of space shuttle Endeavour is lifted during operations to raise the shuttle for securing to the Shuttle Carrier Aircraft (SCA) on Sept. 14. The shuttle is inside the Mate-Demate Device at the Shuttle Landing Facility.

Last mate
To prepare Endeavour for its ferry flight to the West Coast, NASA technicians on Friday towed the shuttle from where it was temporarily parked inside its former launch assembly building to the runway where it last returned from space. Arriving at Kennedy's Shuttle Landing Facility in the pre-dawn hours, Endeavour was moved into a gantry-like steel structure known as the Mate-Demate Device (MDD) to be paired with the 747 SCA. [Gallery: Endeavor Mated to Carrier Aircraft]

"We are a little bit sad that this will be the last time that we're doing this," Stilson told reporters covering the mating operations. "There were definitely some tears this morning during the rollover from the Vehicle Assembly Building to the Mate-Demate Device, especially from those who have worked on Endeavour for a long period of time."

Over the course of several hours, the 155,000-pound (70,000-kilogram) shuttle was attached to a metal sling and hoisted 90 feet into the air so that the carrier aircraft, known by its tail number as NASA 905, could be towed in underneath it. Endeavour was then lowered onto the back of the jetliner, such that three ports on its underbelly aligned with the attachment points protruding from the 747's upper fuselage.

The two craft were "soft-mated" by mid-afternoon. On Saturday, technicians will work to "hard mate" the connection, securing bolts that will hold the two vehicles together in flight. The air- and space-craft combo will exit the MDD on Sunday morning in preparation for their final departure on Monday.

Final flight
The space shuttle era's final ferry flight will take Endeavour on a cross-country tour. In addition to performing low passes while flying over several NASA facilities, the carrier aircraft and its orbiter passenger will make planned stops in Houston and El Paso in Texas, and at Edwards Air Force Base in southern California before finally landing at Los Angeles International Airport (LAX) on Sept. 20.

The journey, and its pre-departure preparations, are subject to both weather and operational constraints and could be delayed or changed, NASA officials advised.

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Once on the ground in Los Angeles and without a corresponding Mate-Demate Device at LAX, Endeavour will be hoisted off the SCA using two large cranes and positioned onto a modified NASA overland transporter. On Oct. 12, the shuttle will begin a two-day road trip to the California Science Center, moving through the streets of Inglewood and L.A. on a 12-mile (19-kilometer) journey to its new home.

The California Science Center will open the new Samuel Oschin Space Shuttle Endeavour Display Pavilion on Oct. 30.

Follow collectSPACE on Facebook and Twitter @collectSPACE and editor Robert Pearlman @robertpearlman. Copyright 2012 collectSPACE.com. All rights reserved.

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Photos: Month in Space: January 2014

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