The transport plane is a double folding wing aircraft and examples of this can be seen on several of the planes at Camp McCarran. This fold-wing design would most likely allow for easier storage of the aircraft in hangars and on the runway. While still functioning before the Great War the planes could most likely serve several dozen passengers per trip comfortably, possibly more, possibly less.
Several can be found at the New California Republic base in Camp McCarran, as well as Searchlight Airport. Another can be found just south of Nipton Road Pit Stop crashed into a basin, half submerged in the desert. There is also another crashed airliner at Zion Canyon.
The transport plane appears in Fallout: New Vegas.