Foil (fluid Mechanics)
A foil is a solid object with a shape such that when placed in a moving fluid at a suitable angle of attack the lift (force generated perpendicular to the fluid flow) is substantially larger than the drag (force generated parallel the fluid flow). If the fluid is a gas, the foil is called an airfoil or aerofoil, and if the fluid is water the foil is called a hydrofoil.
Read more about Foil (fluid Mechanics): Physics of Foils, Basic Design Considerations
Famous quotes containing the word foil:
“Within his crib is surest ward,
This little babe will be thy guard,
If thou wilt foil thy foes with joy,
Then flit not from this heavenly boy.”
—Robert Southwell (1561?–1595)