Status: Retired 1973.
|Trailblazer 1 American test vehicle. The rocket's first three stages would take the upper stage package to a 260 km apogee. The upper stage package was mounted upside-down in relation to the other stages. When it had reached the peak, the three upper stages fired in sequence, ramming the payload, a 13 cm sphere, into the atmosphere at orbital re-entry speeds.|
|Trailblazer 2 American test vehicle. NASA rocket designed for high-speed re-entry tests.|
|Trailblazer 2M American test vehicle. Five stage version for artificial meteorite launches consisting of 2 x Recruit strap-ons + 1 x Castor first stage + 1 x Skat second stage. The upper stage package consisted of 1 x Altair + 1 x Cygnus 15 + 1 x Cygnus 5|
NASA fired a four-stage solid-fuel Trailblazer rocket from Wallops Station, Virginia, in the first of a series of reentry tests. Two stages boosted the rocket to 167 miles; then the other two drove the nose cone down through the atmosphere at 14,000 miles per hour.