Model airplanes mounted on what appears to be a miniature trolley system give the “orders of the day” to the army’s flying cadets at Glendale, Calif. Capt. H. C. Claiborne, chief instructor, devised the three-dimensional method of illustrating formation flights. The tiny planes are fixed to wire tracks over a table map of airport and city, and before the cadets go aloft for maneuvers they see the planes arranged in the military formation they are to follow.