PPRuNe Forums - View Single Post - Concept Tri-Jet Airliner, need advice/aid
Old 14th October 2010 | 19:42
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Mad (Flt) Scientist
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From: La Belle Province
Such charts certainly exist; such parametric studies usually form the basis fort initial designs at the very early stages, before people start to spend serious amounts of money. But they are rather closely held trade secrets obviously (at least the ones OEMs have developed)

The problem with using these parametric methods for a more modern design is that they depend greatly on a large enough set of data to make the parameterization valid. As aircraft programmes have got fewer with each generation, there's less and less data to work with. But they are still better than nothing. "Benchmarking" is basically the same thing, and is used all the time as a sanity check for designs.
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