Only two were constructed, with the second being accepted by the Navy for service as an observation aircraft.

[1] In response to a requirement by the U.S. Navy for light floatplanes capable of being launched off catapults by ships underway, the Gallaudet Aircraft company began development of the "D-4", based on the earlier Gallaudet D-1.

The prototype crashed as result of a failed elevator control during flight testing on 19 July 1918, killing the pilot, Lt. Arthur Souther.

[3] Data from American Combat Planes, p. 118 [1]General characteristics Performance Armament

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