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Full scale technology demonstration of a modern counterrotating unducted fan engine concept. Engine testThe Unducted Fan (UDF) engine is an innovative aircraft engine concept based on an ungeared, counterrotating, unducted, ultra-high-bypass turbofan configuration. This engine is being developed to provide a high thrust-to-weight ratio power plant with exceptional fuel efficiency for subsonic aircraft application. This report covers the successful ground testing of this engine. A test program exceeding 100-hr duration was completed, in which all the major goals were achieved. The following accomplishments were demonstrated: (1) full thrust (25,000 lb); (2) full counterrotating rotor speeds (1393+ rpm); (3) low specific fuel consumption (less than 0.24 lb/hr/lb); (4) new composite fan design; (5) counterrotation of structures, turbines, and fan blades; (6) control system; (7) actuation system; and (8) reverse thrust.
Document ID
19900000733
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Date Acquired
September 6, 2013
Publication Date
December 1, 1987
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NASA-CR-180869
NAS 1.26:180869
Accession Number
90N10049
Funding Number(s)
PROJECT: RTOP 535-03-01
CONTRACT_GRANT: NAS3-24210
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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