Third Wire Productions Inc., (also known simply as Thirdwire or Third Wire), is a Corporation based in Austin, Texas, USA; it is an independent software development company founded in 1999 for the purpose of creating multimedia entertainment, such as flight-simulation and strategy games.
Third Wire is the developer of many computer games, including First Eagles: The Great War 1918 and Strike Fighters: Project 1. There are other products outside of the combat sim genre, a notable example of these projects is First Flight: The Wright Experience Flight Simulator, which is a Wright brothers' Flyer simulator for reenactors.
carts: (used on the runway to start/repair airplanes):
(the modeling was done in blender, texturing in gimp)
* you can see more angles/wires on flickr