Gulfstream HALO I Air Refuelers the Navy ordered the aircraft

the Navy ordered the aircraft while the Army decided to wait for the introduction of the improved Model 75 appearing in 1936

The Su-27 (NATO designation Flanker) is the front-line fighter aircraft designed by the Sukhoi Design Bureau

About the same time

It entered airline service in June 1948 and was popular with airlines serving smaller cities where traffic did not support a larger aircraft

Requires minor assembly (torpedo)

Gulfstream HALO I Air Refuelers the Navy ordered the aircraftHALO Gulfstream airplane model. The High ALtitude Observatory (HALO), is an instrumented Gulfstream IIb twin engine jet aircraft maintained by the United States Army Space and Strategic Defense Command as an optical data collection platform. Capable of operating above 50,000 feet, the HALO's diverse and flexible sensor suite has provided infrared, optical and ultraviolet data on numerous SDIO, NASA and DOD test programs. The HALO contains three