liberty6

This is the Dayton-Wright RB-1 Racer, built to compete in the 1920 Gordon Bennett Cup (like the Verville-Packard R-1 Racer also in the most recent posting of Bain photos). It is still extant as an exhibit at the Henry Ford Museum. See: en.wikipedia.org/wiki/Dayton-Wright_Racer

"Dismantled and shipped to France, the RB-1 was flown by Howard Rinehart in the 28 September 1920 race, but was forced to withdraw after a cable failure prevented full retraction of the gear/flap mechanism,"
en.wikipedia.org/wiki/Dayton-Wright_Racer
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I can't see much resemblance to a DH-4 in this aircraft.. :-). It is a L.W.F. J-2 which was ordered by the US Post Office after the war. Twenty built and I believe this includes the 10 reported as built for the US Army as Twin DH-4. Those final contracts are very difficult to be sure about. Never seen any of these in anything but US Mail markings. Stig

This shot is fuzzy and is from a poor angle to show the similarities, but the wing was the same, but lengthened, the fuselage had a nose cone added in place of the Liberty, and the fin and rudder were the same, but had two additional rudders added, on each side on top of the elevators. It was initially flown with two Hispano-Suiza V-8 engines but these were quickly replaced with two Hall Scott L-6 inline engines of lower power.

Frank Clarke standing next to a Fokker D.VII powered by a Hall-Scott L6 (Liberty L6) engine.