Low Orbit

Thunderbird 3 is a single-stage-to-orbit (SSTO) space vehicle, designed for space rescue and maintaining the systems and crew of the Thunderbird 5 space station, or so it says on the Thunderbirds wiki anyway. To a small boy sitting on the edge of the sofa back in 1965 it was super cool. Perhaps not as supercool as TB1 & 2 but certainly more so than TB4 and definitely TB5 both of which were pretty cool themselves anyway so the whole show was a cool fest' of vehicles complete with stuff being blown up :)