EDIT- Smart reserve wing loading measurements - Edit

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The old PIA canopy measuring method measured chord in a straight line from trailing edge to top leading edge. That method was quick and easy on rectangular canopies, but awkward and inaccurate on tapered canopies.

Performance Designs uses a simpler method that only measures the bottom skin. The PD method always produces smaller areas than the same canopy measured by PIA methods. IOW PD canopies always “fly ten percent bigger” than PD’s size numbers suggest. Several other manufacturers eventually adopted PIA’s method.

So that might explain why Aerodyne publishes miss-matched numbers.

Smarts also have more reinforcing tapes in their tails.

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