Preliminary investigation of rolling moments obtained with spoilers on both slotted and plain wings
A 1932 NASA technical report, a preliminary aeronautical research study on how spoilers on slotted and plain wings change rolling moment, written for aircraft engineers. Its pictures are engineering graphs of rolling-moment coefficient against angle of attack, with families of labelled curves for spoiler deflection and one wing cross-section sketch, useful to a designer for their clean plotted line styles and dense multi-series layouts.
