Determination of climbing ability
A 1923 technical report from the NASA Technical Reports Server, issued as a scanned aeronautical document on determining an aircraft's climbing ability. Its two pictures are plotted graphs rather than illustrations, aimed at engineers and flight researchers. The first graph plots altitude in metres against time in minutes as a smooth rising curve with marked data points and labelled intervals, while the second shows a similar time-versus-height curve with dashed guide lines. A designer might borrow the clean, sparse line-graph style with dashed grids and small circular data markers for diagram work.
