Many of Langley Laboratory's early experiments focused on ways to reduce aircraft drag. One method was to place a cowling or covering over the engine cylinder heads, much like the hood over the engine of a car. By the end of September 1928, wind tunnel tests of cowling #10 showed a dramatic reduction in drag.
Many of Langley Laboratory’s early experiments focused on ways to reduce aircraft drag. One method was to place a cowling or covering over the engine cylinder heads, much like the hood over the engine of a car. By the end of September 1928, wind tunnel tests of cowling #10 showed a dramatic reduction in drag.Image Credit: NACA