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High Altitude Performance of High Bypass Ratio Engines - an Airframe Manufacturer's Point of View
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English
Abstract
The traditional method of determining the net thrust of an engine in cruise is explained. It is shown to result in a satisfactory net thrust uncertainty for jet and low bypass ratio engines but to be unsuitable for high bypass ratio engines. A redefinition of net thrust results in a new thrust determination method, called continuity method, which yields acceptable levels of net thrust uncertainty. The new method no longer requires supporting tests in a simulated altitude facility. The question is raised whether in future programs the demonstration of guaranteed cruise performance of an engine should not be carried out in flight tests rather than in an altitude test facility.
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Citation
Bouwer, D. and Schott, G., "High Altitude Performance of High Bypass Ratio Engines - an Airframe Manufacturer's Point of View," SAE Technical Paper 690652, 1969, https://doi.org/10.4271/690652.Also In
References
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