TB2 meaning in Community ?

The Thunderbird machines are a series of vehicles imagined for the mid-1960s film and television Thunderbirds series, developed by Gerry Anderson. The released work began with the Supermarionation television series Thunderbirds and was followed by subsequent feature films Thunderbirds Are Go and Thunderbird 6 in 1965–68. The series featured a large variety of futuristic air, land and sea vehicles and machines, the majority of which were designed by special effects director Derek Meddings.

In the context of the series, most of the advanced machines appearing in the series belonged to the International Rescue organisation and were used during their rescues. These were known as the "Thunderbirds", of which there were five core machines and a variety of other rescue craft. It was after these that the series was named. In the series, all of the International Rescue vehicles were designed by the organisation's resident technical genius known as Brains.

The use of these models in Anderson's Supermarionation productions beginning with Supercar was a significant advance in television production. This dirt and wear was applied as a way of adding realism and countering the miniature models' toy-like appearance.