Quote:
Originally Posted by Snalios
Its not that hard to believe, considering that lexan weights more then aluminum.
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Polycarbonate (Lexan) weighs about half as much as the same size piece of aluminum. However, it is not nearly as stiff. To achieve a similar stiffness (which is necessary in things like arms, chassis, etc.) you're going to end up at around the same weight as if you did it with aluminum, maybe even a little heavier. The weight in this robot probably went towards making it stiff enough for the rigors of competition (drivetrains that flex are not fun).