The Bent Wingtips That Save Billions in Fuel

The Bent Wingtips That Save Billions in Fuel

Sit in a window seat over the wing of almost any modern airliner and you will see it: the wingtip, instead of ending in a clean point, bends sharply upward into a fin. It looks like a small design flourish. It is not. That upturned tip is quietly one of the most...
Le jet avec ses ailes à l'envers

Le jet avec ses ailes à l'envers

Roll the X-29 onto its back and the wings look wrong. Not damaged, not folded for storage — just backwards. Where every other jet on the ramp sweeps its wings rearward like an arrowhead, the X-29 sweeps them forward, the tips reaching out ahead of the roots as...