| Abstract | In view of the unusual nature of the air flow to be expected in this tunnel, when wind and fan streams interact, it was thought desirable to test models of various types of working section. In order to obtain maximum speed from the available power, a 10' x 15’ working jet was assumed, with the wing spanning the 10’ dimension, leaving a 10’ span x 7 1/2’ high jet above it, and the same below it. A 9’ chord wing was assumed, with a 3’ dia. fan in it. The tests described covered various configurations of working section, divided into two main groups, namely, open-jet and closed-tunnel working sections. |
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