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Dual Cycle Operation of the Shaft Driven Lift Fan Propulsion System
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English
Abstract
Analysis and testing are used to show the feasibility of an innovative shaft driven lift fan propulsion system for supersonic STOVL aircraft. Dual cycle operation of the cruise engine makes it possible to convert some of the jet thrust to shaft horsepower for driving the lift fan. Operation of the propulsion system is described and it is analytically shown that the designs of the engine, drive shaft, and clutch are within the state of the art. A demonstrator engine and lift fan were assembled from available components and operated for almost 200 hours in a full size airframe model. Testing proved the feasibility of changing the engine cycle to drive the lift fan, and of rapidly transferring thrust back and forth between the engine and lift fan to provide pitch control. The durability of the mechanical drive system and flight weight gearbox were also demonstrated.
Authors
Citation
Bevilaqua, P., "Dual Cycle Operation of the Shaft Driven Lift Fan Propulsion System," SAE Technical Paper 962274, 1996, https://doi.org/10.4271/962274.Also In
References
- Jackson, R. “The Value of STOVL” Proceedings of the International Powered Lift Conference SAE Paper 962301 November 1996
- Driggers, H. Powers, S. Roush, R “Study of Aerodynamic Technology for Single Engine VSTOL Fighter/Attack Aircraft” February 1982
- Ward, B. Penrose, C. “The Hybrid Fan Vectored Thrust Engine” Aerospace Congress and Exposition SAE Paper 831496 October 1983
- Eshleman, J. “Large Scale Testing of the Lockheed Martin JSF Configuration” Proceedings of the International Powered Lift Conference SAE Paper 962296 November 1996