3. Advice and Politics, 1919-1926 A National Aviation Policy.... 4. Tunnel Vision, 1919-1926.... The NACA's Role in War........ 8. What Price Victory, 1941-1945 ...... 9. The Writing on the Tunnel Wall, 1946-1950. The National Unitary Wind Tunnel Plan. 10. New Genius, Old Bottle, 1945-1950 ..... Director of the NACA............................ NACA appropriations by fiscal year: 1915-1935, 1936-1959. 476 Total NACA appropriations by fiscal year...... 477 NACA organization chart, 1958 (hypothetical).............................. 488 V-173 model in Langley full-scale tunnel, 1941; submarine model in same tunnel, 1950s...... 513 Air-return passage, Langley full-scale tunnel......... 516 Langley 5-foot free-flight tunnel ............ 517 Drawing of 19-foot pressure tunnel at Langley; model of F94F in test section.... 519 Langley 16-foot high-speed tunnel Page 520 522 525 528 Profile of a boundary layer. 529 Shadowgraph of transition from laminar to turbulent flow 530 Smoke-flow visualization of wing at varying angles of incidence..... 531 Separation of boundary layer 532 Transition from laminar to turbulent flow; maintenance of laminar flow. 534 |