74:. He applied at the Bell Labs but was not accepted and opted for his second choice Langley. His knowledge of complex analysis was key to current airfoil design techniques at the time. He quickly became one of the leading scientists at the Langley Research Center due to his work with optimizing airfoils using a variable density wind tunnel that could operate with high
78:. He was also officially the head of the Variable Density Wind Tunnel Division from 1928-1939. He and his colleagues were able to significantly reduce the turbulence in the wind tunnel, which led to a better understanding of boundary development around airfoil sections. A better knowledge of boundary layer growth then led to an optimization scheme for low-drag
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propagating over an airfoil using
Schlieren photography. In 1935, he was invited to the now famous fifth Volta conference on aerodynamics titled "High Velocities in Aviation". There, he gave a presentation on high-speed wind tunnels and his Schlieren images which exposed the technology to the rest
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E. N. Jacobs, K. E. Ward, & R. M. Pinkerton 1933 The characteristics of 78 related airfoil sections from tests in the variable-density wind tunnel, NACA Report No. 460.
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in 1958) from the 1920s to the 1940s. He was responsible for advancing many fields in aerodynamics, dealing particularly with
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aircraft referred to "Jake's Jeep", but this work was canceled by the NACA. He retired at an early age of 42 in 1944.
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airfoils. This optimization scheme produced the NACA 4-digit airfoils that led to faster aircraft like the
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