appeared on anything but experimental or racing
             aircraft. The greatest spurs of technological advancement were racing and record breaking.
             Races such as the Pulitzer Trophy landplace races (U.S. only) and the Schneider Trophy
             Seaplance races (international, but most heavily involved were Italy, the U.K. and the U.S.A.)
             caused the development of high-output engines, advanced aerodynamics, and public enthusiasm
             and awareness in aviation matters. (Batchelor, p42-56)
             Record breaking got airplanes flying faster, farther, and higher. Aircraft built specifically
             for record-breaking were no good for other things because they were a small, optimized plane, but
             ...