February 27, 2013
That classical physics can be easily extended to produce results originally derived by Einstein's general theory of relativity, but with ordinary concepts of space and time, in shown in this concise paper written by Theodore Theodorsen, the head theorist at N.A.C.A. (forerunner of NASA) in the heady days when aeronautics evolved from a very primitive art into a full-fledged science. A physicist, and long-time skeptic about Einstein theory, he sought and developed explanations to replace those involving curved spacetime
and abstract mathematical fields. In essence, Newtonian theory is modified by only a "quantum" change to yield Einstein's results. (Appendices added 27-2-13)We are very grateful to Muriel T. Williams for presenting us with her father's manuscript.