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Ducted Propulsors-Progress in the United Kingdom
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English
Abstract
The concept of the Ducted Propulsor as a quiet propulsive device is relatively new and, because of this, there is a justifiable demand to see evidence that the claims made can be met.
Over the last two years, Dowty Rotol have done a considerable amount of test work and have amassed measured data on thrust, noise, efficiency, cowl drag and windmilling drag. The main part of the paper is devoted to presenting these data in order to answer affirmatively and convincingly the aircraft designers' question-will it work?
To preface this, the paper reiterates the case for the Ducted Propulsor, the idea of which was introduced some time ago. Briefly, it meets the noise regulations predicted to 1980 and beyond, it is lighter than the equivalent Quiet Propeller and costs less. The performance characteristics are about the same but the propulsor affords the aircraft designer more flexibility. Furthermore, it helps to reduce exhaust pollution.
Finally, the paper outlines the current program of work to build and test a fully integrated ducted propulsor power plant.
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Citation
Davis, D., "Ducted Propulsors-Progress in the United Kingdom," SAE Technical Paper 750534, 1975, https://doi.org/10.4271/750534.Also In
References
- Galloway T.L. Mayo M.G. Rohrbach C. Waters M.H. “Shrouded Fan Propulsors for Light Aircraft.” Paper 730323 SAE National Business Aircraft Meeting Wichita April 1973
- Metzger F.B. Worobel R. “New Low Pressure-Ratio Fans for Quiet Business Aircraft Propulsion.” Paper 730288 SAE National Business Aircraft Meeting Wichita April 1973
- Carvey D. Lucas G.G. “A Possible Solution for Spark Ignition Engine Pollution.” Paper D.18 Symposium on the Environment and Transport Technology Loughborough University September 1973
- Lakshminarayana B. “Methods of Predicting the Tip Clearance Effects in Axial Flow Turbomachinery.” Journal of Basic Engineering September 1970