Centre of Pressure on Triangular Plane Gliders at Small Angles of Incidence

Abstract

MAY I direct the attention of those interested in aërodynamics to the fact that the centre of pressure on a triangular plane glider (apex forward) at a small angle of incidence (angle of attack), say 5° to 10°, lies almost exactly at the centre of the lengtri? The good gliding qualities of the ordinary paper arrow (folded from a square or rectangular piece of paper with its e.g. necessarily central) point to this conclusion, which may be further tested by the following form of glider.