Retrofit
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Strange V(TO)L re-entry vehicle concept designed by General Dynamics under a NASA contract in 1966-67.
After a normal re-entry and a parchutal descent, lift-engines are started, parachute is jettisson, and the vehicle operate as a VTOL aircraft to accomplish a certain amount of ranging to a suitable touchdown point where it lands verticaly.
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770082994_1977082994.pdf
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19830071860_1983071860.pdf
After a normal re-entry and a parchutal descent, lift-engines are started, parachute is jettisson, and the vehicle operate as a VTOL aircraft to accomplish a certain amount of ranging to a suitable touchdown point where it lands verticaly.
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770082994_1977082994.pdf
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19830071860_1983071860.pdf
