Tests of Nacelle-Propeller Combinations in Various Positions with Reference to Wings III : Clark Y Wing - Various Radial-engine Cowlings - Tractor Propeller
This is a 1933 NASA technical report, issued through the NASA Technical Reports Server, on wind-tunnel tests of engine nacelles and propellers mounted at various positions relative to a Clark Y wing, covering several radial-engine cowling shapes and a tractor propeller. The pictures show the model setups in the test section, with a wooden wing model on stands, a nacelle and propeller in front of a large wind-tunnel fan, and a row of photographs comparing cylinder and cowl variations. A designer could take from them the stark, documentary look of early aeronautical test photography, with its grid of tall windows, plain wooden supports, and pale grey tones.
