Engineering Division TW-1 explained

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 2300NaN0 Liberty 6. The second aircraft was tested at McCook Field, (given the McCook designation P-200) and subsequently modified with a 3500NaN0 Packard 1A-1237 engine but no others were built.

References

Bibliography

• Book: Andrade, John . U.S. Military Aircraft Designations and Serials since 1909 . 1979 . Midland Counties Publications . Hinckley, Leicestershire, UK . 0-904597-22-9.