Now you have to define what a Bipe is. . . Is a T-Canalizer a second wing? There are some radical designs out there with lifting surfaces all over the place. . . ugh.
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Perhaps instead of measuring Weight, we should measure the Volume of an airplane. Should be easy enough with a 2M by 2M hot tub full of water . . . each contestant submerges their airplane and then measure how much was displaced. . .
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I better add one of these really, really quickly. . . ->
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ORIGINAL: Mike Wiz
So the spirit of the rule is to keep the planes from getting too big. Makes sense. Maybe a better rule would make bipes carry a smaller wing span.