The second prototype MB-3 with the original tail

A Boeing-built MB-3A with the final enlarged fin.

The Thomas-Morse MB-3A in its definitive form.

Thomas-Morse abandoned the MB-9 before it could be submitted for USAAS evaluation.

Thomas-Morse abandoned the MB-9

The sole example of the MB-2 was modified to this twin-bay form after first being flown with single-bay wings.

The TM-23 completely rebuilt for submission to the USAAS.

The TM-23 as first tested in 1924

Last of the Thomas-Morse fighters, the XP-13 was flown with the Curtiss H-1640 engine and then with P & W Wasp (shown).

Last of the Thomas-Morse fighters, the XP-13 was flown with the Curtiss H-1640 engine (shown) and then with P & W Wasp.