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Shows mechanical performance of a gear-driven fan in a VTOL wing, highlighting design effectiveness.
A 12 inch diameter gear driven fan, having a gross disc loading of about 450 Ib/ft² , was installed in a wing for wind tunnel studies on the fan inlet. The mechanical arrangements of the fan and drive, which included a turbine mounted at one end of the wing, are described. Preliminary mechanical testing was carried out in the Engine Laboratory, after which the wing and fan were installed in a 10' x 20' wind tunnel for aerodynamic studies. Problems relating to oil seals and oil leakage are discussed. About 20 hours of running were completed on the rotating machinery. A strip inspection of components then showed them to be in good condition.
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Levy et al. (1967) studied this question.
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