Development of Borsic®-Aluminum Composite Fan Blades for Supersonic Turbofan Engines PUBLIC ACCESS

[+] Author Affiliations
W. J. Schulz

Air Force Materials Laboratory, Wright-Patterson AF Base, Dayton, OH

J. A. Mangiapane, H. Stargardter

Pratt & Whitney Aircraft, East Hartford, CT

Paper No. 71-GT-90, pp. V001T01A090; 13 pages
  • ASME 1971 International Gas Turbine Conference and Products Show
  • ASME 1971 International Gas Turbine Conference and Products Show
  • Houston, Texas, USA, March 28–April 1, 1971
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7982-5
  • Copyright © 1971 by ASME


The development of BORSIC®-Aluminum fan blades for elevated temperature application in gas-turbine power plants has been successfully demonstrated. These fan blades are over 40 percent lighter than the titanium blades currently in use. In addition, the high modulus of the reinforcement allows fan blades to be designed without partspan shrouds which will result in a 1 percent increase in fan efficiency. A full set of blades (36) fabricated by diffusion bonding were assembled in a rotor and tested in an aeromechanical rig with both a clean inlet and a distortion inlet at ambient inlet temperature as well as with a heated inlet to produce a blade temperature of 430 F. Total running time was 30.3 hrs, eight of which were at or above design speed. The rig ran for 0.5 hrs at design speed with a blade temperature of 430 F. No severe vibratory stresses were encountered with either a clean inlet or a 2E distortion screen.

Copyright © 1971 by ASME
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