Burner (rocket stage)

[1][2] In September 1965, Air Force Space Systems Division announced the development of a new, low cost upper stage called Burner II, powered by Thiokol TE-M-364-2 engine.

In June 1967, the first Thor/Burner II vehicle successfully launched a pair of satellites to orbit.

[3] In the mid-1970s Burner II was also studied for use as an upper stage in combination with the Space Shuttle.

NASA managers choose other solutions for missions where upper stages were required.

The first launch failed with the second delivering a radiation research payload for the Space Test Program (P72-1 Radsat) using Burner IIA.