Shipbucket

So, quick question:
When specs are given for the wingspan of a biplane, one who's wings are not of equal length, to which wing is it reffering? I'm pretty sure it's the longer upper wing, is this correct?

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"If people never did silly things nothing intelligent would ever get done." ~Ludwig Wittgenstein

The longer wing, which is (at least theoretically) not always the upper wing. And at that point, the technical term is "sesquiplane".

EDIT: Just for clarification, a "sesquiplane" is a plane with unequal span wings, not one where the bottom wing is specifically longer than the top. In practice as far as combat planes were concerned, they were an intermediary step between biplanes and monoplanes.

By very essence, it refers to those wings whose span is longer.

Thanks guys!

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"If people never did silly things nothing intelligent would ever get done." ~Ludwig Wittgenstein