L.W.F. (Lowe, Willard and Fowler) built the J-2 (also known as the
Twin D.H.) as a two-engined development of the Airco D.H.4 for
the Air Mail Service. The single Liberty engine was removed from the
nose to created more room for mail and two 200 hp Hall-Scott L-6
engines were installed between the wings. The wing span was increased
by 10 ft 0.5 in (3.06 m) to 52 ft 6 in (16.00 m), creating a 108 sq.ft
(10 sq.m) increase of wing area. For directional control two extra
rudders were fitted. Twenty aircraft were built for the Post Office
and 10 for the USAAS, it was not successful and was quickly withdrawn
from service.
