Probably the earliest projectile throwing device used by man, the simple
sling acted as an extension of the thrower's arm resulting in a mechanical
advantage that increased projectile range and speed.
The sling consists of two cords and a flexible pouch. With a projectile
placed in the folded pouch, the loose ends of both cords are held in one
When ready, the thrower draws back his arm and swings the sling up and
forward. Just before apex, the thrower releases one cord, opening
the pouch and sending the projectile on a ballistic path.
In trained hands, the sling was very accurate. Although best known for
its role in the story of David and Goliath, slings were used by most, if
not all, ancient armies. The Egyptian, Greek and Roman armies used slings
in combat. <<
The staff sling was a logical advancement over the sling. Using a single
pole, or staff, in place of two cords, the staff sling allowed for heavier
projectiles and an increased rate of fire.
One end of the staff sling’s pouch is fixed to the staff, while the
other end is free. The free end has a hole, or loop, slipped over a pin
extending from the end of the staff, or notch cut into the staff.
The pin is bent, or the notch cut, so as to allow the free end of the pouch
to slip off at the proper angle releasing the projectile.
Invention of the staff sling was instrumental in the development of
ancient torsion catapults and eventually,
The torsion catapult , or onager as
it is also known, is the combination of a simple sling and a large staff
sling, or arm, powered by a bundle of twisted cord , or skein.
The onager allowed the Romans to employ fairly large projectiles at
relatively long range. It fired not only solid projectiles, but also a
form of grapeshot made from smaller stones baked in a clay ball.
Introduced in the twelfth century, the trebuchet
was a major advancement in warfare. Like the onager , the trebuchet employed
the advantages of both the simple sling and staff sling , but used the
energy of a falling weight to throw massive projectiles great distances.
The trebuchet was used primarily as a siege weapon for attacking fortifications.
Because of their enormous size, trebuchets were built at the siege site,
using local materials, if available.
Sling Weapons - Sling , Staff
Sling , Catapult and Trebuchet
The Evolution of Sling Weapons from the Simple Sling to the Trebuchet