The first launch of the " Shuttle Carrier Aircraft 905"
- a converted Boeing 747-123 passenger aircraft
- with the Space Shuttle " Enterprise" attached to its back took place in 1977 During five test flights the space shuttle was disconnected from the SCA 905 in order to test the flight & landing characteristics of the orbiter The " Enterprise" landed of its own accord after its approach glide By the end of the Space Shuttle program the American National Aviation & Space Agency (NASA) had conducted more than 220 "piggy backmissions" with the SCA 905 During its last missions the " Discovery" the " Enterprise" & the " Endeavour" were transferred to various museums On 17 March 2012 SCA 905 landed at Dulles International Airport with the Space Shuttle " Discovery" The Space Shuttle is now on permanent display in the " National Air & Space Museum" in Washington Model kit contain 119 pieces Model kits are designed for children aged 10 years & upwards Measures 489 cm in length & it has 422 cm span width