N.A.C.A. Control Position Recorder
This is a 1922 technical report from the National Advisory Committee for Aeronautics, issued by the NASA Technical Reports Server collection, documenting a control position recorder for aircraft testing. The photograph shows a close view of the apparatus: a white-painted upright housing with a crank handle on top, a dark mechanical unit at left, and a pedestal with a knurled knob, with numbered leader lines marking parts 2 through 5. A designer might take from it the plain, utilitarian look of early instrument photography, with sepia tones, precise numbered callouts, and bare industrial surfaces.
