The vire is a type of feature of Arbalète, intended for a military use with the Middle Ages. Approaching the Dondaine by the reinflated shape of its barrel, it is characterized some by the helicoid provision of its empennage. That Ci imposes to him during its flight a rotation around its axis, which increases its capacities of perforation of armours and causes (coupled with the use of points with barbelures) of the terrible wounds.

See too

• Square of crossbow
• Dondaine