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Keywords: Cost index
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Journal Articles
Aircraft Engineering and Aerospace Technology: An International Journal (2014) 86 (6): 591–598.
Published: 30 September 2014
... is derived. To enable optimum economics operations, a cost index (CI) derivation is introduced for a variety of hybrid-electric concepts to consider the additional time-related cost. The application of COSAR and of the CI is demonstrated for cruise optimisation of a hybrid-electric retrofit aircraft concept...

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