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Propfan Test Assessment (PTA): Flight test reportThe Propfan Test Assessment (PTA) aircraft was flown to obtain glade stress and noise data for a 2.74m (9 ft.) diameter single rotation propfan. Tests were performed at Mach numbers to 0.85 and altitudes to 12,192m (40,000 ft.). The propfan was well-behaved structurally over the entire flight envelope, demonstrating that the blade design technology was completely adequate. Noise data were characterized by strong signals at blade passage frequency and up to 10 harmonics. Cabin noise was not so high as to preclude attainment of comfortable levels with suitable wall treatment. Community noise was not excessive.
Document ID
19900002422
Document Type
Contractor Report (CR)
Authors
Little, B. H. (Lockheed Aeronautical Systems Co. Marietta, GA, United States)
Bartel, H. W. (Lockheed Aeronautical Systems Co. Marietta, GA, United States)
Reddy, N. N. (Lockheed Aeronautical Systems Co. Marietta, GA, United States)
Swift, G. (Lockheed Aeronautical Systems Co. Marietta, GA, United States)
Withers, C. C. (Lockheed Aeronautical Systems Co. Marietta, GA, United States)
Brown, P. C. (United Technologies Corp. Windsor Locks, CT., United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1989
Subject Category
AIRCRAFT PROPULSION AND POWER
Report/Patent Number
NASA-CR-182278
LG89ER0026
NAS 1.26:182278
Funding Number(s)
CONTRACT_GRANT: NAS3-24339
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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