The Behavior of Conventional Airplanes in Situations Thought to Lead to Most Crashes
This is a 1931 NACA technical report, issued by the National Advisory Committee for Aeronautics, on how conventional airplanes behave in situations thought to precede most crashes. The first picture is a line graph of altitude in feet against time in seconds for several control-handling tests, and the second is a photographed page showing an instrument board with altimeter, data sheet and stop watches. A designer could take from them the clean, sparse charting style of early engineering reports and the dense, functional layout of a technical instrument panel.
