Engineering Division TW-1

The Engineering Division TW-1 was an American two-seat training biplane designed by the United States Army Engineering Division, only two were built and the type did not enter production.

Design and development
Two prototypes of the TW-1 were built powered by a 230 hp Liberty 6. The second aircraft was tested at McCook Field, (given the McCook designation P-200) and subsequently modified with a 350 hp Packard 1A-1237 engine but no others were built.