1. Theodore von Karman with Lee Edson, The Wind and Beyond (Boston: Little Brown, 1967), pp. 267-68. See also H. H. Arnold, Global Mission (New York: Harper, 1949), pp. 532-33; Arnold to von Karman, 7 Nov. 1944, NASA History Office.
2. As quoted by Thomas A. Sturm, The USAF Scientific Advisory Board: Its First Twenty Years, 1944-1964 (Washington: USAF Historical Division Liaison Office, 1967), p. 2.
3. Arnold, Global Mission, p. 530.
4. Eugene M. Emme, Aeronautics and Astronautics: An American Chronology of Science and Technology in the Exploration of Space, 1915-1960 (Washington: NASA, 1961), p. 46.
5. Robert Schlaifer, "Development of Aircraft Engines" (Boston: Harvard Univ., 1950); reprinted in Development of Aircraft Engines and Fuels (Elmsford, NY: Maxwell Reprint, 1970), pp. 321-508. Schlaifer gives an excellent account of aircraft gas turbine developments from origins through World War II.
6. Ibid., pp. 457-61; also Durand committee files, NASA History Office.
7. The original XP-80 was built to use a British jet engine, which Schlaifer, "Development of Aircraft Engines," p. 475, identifies as a de Haviland Goblin; Emme, Aeronautics ana Astronautics: An American Chronology, p. 47, identifies it as a Halford engine. The time for building the XP-90 came from an interview with C. L. Johnson and B. R. Rich, Lockheed California Co., Burbank. 2 May 1974.
8. Arnold, Global Mission, p. 544.
9. Schlaifer, "Development of Aircraft Engines," p. 321.
10. Telephone interview with Robert E. Littell, Falls Church, VA, 20 Aug. 1973.
11. James Phinney Baxter, 3d, Scientists against Time (Cambridge: MIT Press, 1946), p. 15; John E. Burchard, ed., Rockets, Guns and Targets, in the Office of Scientific Research and Development series, Science in World War II (Boston: Little, Brown, 1948), p. 5.
12. Alexis W. Lemmon, Jr., "Fuel Systems for Jet Propulsion" (Washington: Navy, 1945).
13. Ibid., p-18.
14. Ibid., p. 27.