The Effect on Performance of a Cutaway Center Section
This is a 1928 NACA technical note from the National Advisory Committee for Aeronautics, issued in the United States for engineers and aircraft designers, on how a cutaway center section in a biplane wing affects climb performance and forward vision. Its pages are plain engineering graphs of altitude against time and horsepower curves, plus two side-profile diagrams of blind-angle fields of view from the cockpit of a Vought VE-7 and a Boeing PW-9. A designer might take from them the clean, labelled line-graph style of early aviation engineering and the simple wedge diagrams showing sight lines from a cockpit.
