The T.T.A. (Twin Tractor Type A) was derived from the projected T.T. due to the non-avaiability of the R.A.F.4A
powerplants. Two 120 hp Beardmore powerplants.
The T.T. (Twin Tractor) was a local defence two-seat
biplane. The gunner was located in the nose had an unobstructed field of fire in the forward hemisphere for two free-mounted
Lewis guns. The pilot had a single Lewis gun firing aft. Dual controls were fitted for emergency use. Four 150 h.p R.A.F.4a