In the transonic region an air foil's speed may increase by say 2%, but the increase in drag (in the transonic region) may be 8%.

A 60-inch air foil spanned the rear deck.

The sword is not an air foil.

And the guns are popping, and the swords and clubs are swinging, and the air foils are flickering in the darkness.

"Like the air foil," Bordi suggests, drawing one and examining it.

First as a design problem, shaping the air foil, then as an analysis problem, to detail the aerodynamic performance of the design.

Scubapro, a company based in Rancho Dominguez, Calif., has a fin whose blade is shaped like an air foil.

This,Ako'i, is one of the old air foils.

Unlike a Formula One car, which is prohibited from having movable spoilers, the Enzo uses speed-sensitive air foils and a rear spoiler to increase downforce at speed.

Most distinctively, the car's lower lip - a little like the hinged wings of a Vought Corsair fighter plane - echoes the front air foil of Ferrari's Formula One car.