Photograph: rear view of the engine and tail boom of a Maurice Farman Longhorn training aircraft, standing in a grass airfield, with two canvas hangars in the background right, 1917-1918 (c).
A Royal Flying Corps mechanic stands, resting one hand against the engine housing, probably at a training airfield within a commandeered racecourse. 
From an album containing 96 photographs relating to Lt William Charles Carter who served in the Artists’ Rifles The London Regiment from 1913 and 13 Sqn Royal Flying Corps 1917-1918.