Results from a test of a 2/3-scale V-22 rotor and wing in the 40- by 80-Foot Wind TunnelA test of a 0.658-scale V-22 rotor and wing was conducted in the 40- by 80-Foot Wind Tunnel at Ames Research Center. The principal objectives of the test were to measure the wing download in hover for a variety of test configurations, and rotor performance in forward flight. Also, a limited amount of data on rotor performance in vertical climb were acquired. This paper presents the results from the test with predictions from appropriate analytical methods. A new method for presenting and interpreting wing surface pressure data in hover is described, and this method shows that the wing flap can produce substantial lift loads in hover. The rotor performance in vertical climb was underpredicted by CAMRAD/JA and by the free wake analysis EHPIC. A simple momentum theory is presented which provides good predictions of rotor performance in forward flight.
Document ID
19920031708
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Felker, Fort F. (NASA Ames Research Center Moffett Field, CA, United States)