Variable configuration track laying vehicle

A variable configuration track laying vehicle comprising a body, a series of wheels disposed at each side of said body and including a driving wheel rotatably mounted on said body adjacent to one of the ends thereof, a secondary wheel rotatably mounted on said body adjacent to the other end thereof and an auxiliary wheel movable relative to said body within a plane in which said driving wheel and secondary wheel are disposed, a loop of endless track extending around said driving, secondary and auxiliary wheels on each side of said body, means within said body for driving said driving wheel, and means for moving said auxiliary wheel relative to said body within said plane to vary the configuration of said loop of said endless track, said means for moving said auxiliary wheel including arm means comprising a first arm pivotally connected at one end to said body between said driving wheel and said secondary wheel and a second arm pivotally connected at one end to the other end of said first arm and rotatably supporting said auxiliary wheel at the other end of said second arm and means within said body for angularly moving said first arm relative to said body.