NASA will continue to use N905NA to research reducing turbulence produced by larger aircraft.
This 747-100 was originally delivered to American Airlines in 1970 as N9668. In 1974, NASA took ownership and was converted to a Shuttle Carrier.
From NASA’s website, the features that distinguish the two SCAs from standard 747 jetliners are:
- Three struts with associated interior structural strengthening protrude from the top of the fuselage (two aft, one forward) on which the orbiter is attached.
- Two additional vertical stabilizers, one on each end of the standard horizontal stabilizer, to enhance directional stability.
- Removal of all interior furnishings and equipment aft of the forward No. 1 doors.
- Instrumentation used by SCA flight crews and engineers to monitor orbiter electrical loads during the ferry flights and also during pre- and post-ferry flight operations.
Thanks to SpeedBirdHD for taking and sharing this video.