Word: laminar
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Dates: during 1939-1939
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...during the past year. Approximately one-half the drag, i.e., the speed-killing characteristic, of the modern airplane is caused by its wings. Most of the wing drag is caused by air friction along the surface which, as the plane speeds through the air, changes from a smooth or laminar flow near the leading edge to a tumbling, churning turbulence farther back on the wing...
NACA's engineers have succeeded in designing a wing which has laminar flow over virtually its entire surface. The result: reduction of the wing drag by about...