The Boeing C-137 Stratoliner is a retired VIP transport aircraft derived from the Boeing 707 jet airliner used by the United States Air Force. Other nations also bought both new and used …

Initial orders were placed for two aircraft, designated EC-137D, as test beds to evaluate the two competing radars. As the test beds did not need the same 14-hour endurance demanded of …

Feb 9, 2021 · An Air Force Flight Test Center test team began series of airworthiness evaluations of an EC-137D at the Boeing facility in Seattle, Washington. The EC-137D was a Boeing 707 …

3 days ago · The Boeing E-3 Sentry is the West's principal AWACS platform. The EC-137D prototype first flew on February 5, 1972, followed by the E-3A first flight on October 31, 1975. …

Boeing EC-137D (E-3A) Description Notes: Boeing 707 with extended fuselage and JT3D-3B engines used to provide airborne command, control, and communications for uncincsoc.

Jun 13, 2020 · In this U.S. Air Force Aerospace Defense Command News Digest (No. 91), likely from 1972, viewers see the tests conducted on a Boeing EC-137D Sentry (later named the …

Apr 25, 2016 · The EC-137D designation was reserved for related Early Warning and Control System (EWAC) aircraft prototypes and numbered two. These then evolved under the E-3A …

Boeing won the contract in 1970, which specified construction of two initial "EC-137D" machines, modified from 707-320B jetliners taken off the production line, retaining the passenger …

Feb 7, 2018 · The US designed E-3D Sentry AEW.Mk 1 is an airborne early warning (AEW) and command and control aircraft in British service, but what does that mean? The Sentry monitors …

Trials of competing Hughes and Westinghouse radars were held using a pair of rebuilt Boeing 707-320Bs, which were designated EC-137D. The first EC-137D flew on February 5th 1972. …