Downwind glide foil — high aspect reference front wing

The other end of the hydrofoil range from the surf/pump wing: a high-aspect downwind glide wing, sized around a higher speed and a much lower design lift coefficient.

Put the two side by side and the trade is visible in the planform before any analysis runs — more span, less chord, and a section doing less work per unit area. That is the whole downwind argument: at 8 m/s you do not need the lift, you need the glide.

What to do with it

This is a reference design, not a recommendation. The useful exercise is to fork it, move the aspect ratio toward the wing you actually ride, and look at where the drag curves cross — they will cross, and the speed at which they do is the number that decides which wing is right for your water.

The polars above are foil.tools' own analysis of this model, not published performance data for the aircraft. They are AeroBuildup — strip theory with NeuralFoil sections — for the wing alone, so they exclude the fuselage, the undercarriage and everything else that makes a real aeroplane slower than its wing. Read them for how this shape behaves, and for comparison against the other wings here — not as a figure for the aircraft. Open it in the designer and run your own.