[1] In 1963, the Soviet government held a request for proposal among the aircraft design bureaus.

In 1974, the Ministry of Aviation Industry (Soviet Union) ordered work suspended on the T-4 project, which was officially scrapped on 19 December 1975.

The aircraft's droop nose lowered to provide visibility during takeoff and landing.

A periscope was used for forward viewing when the nose was retracted, and could be employed at speeds of up to 600 km/h (370 mph).

Aircraft "101" is on display at the Central Air Force Museum in Monino near Moscow.