This is a model of the Greek -- Roman portable Ballista. This was an element of artillery
in the ancient and classical armies. The two wing-like extensions are the ends of the
bow and the bow string is drawn back along the tal end of the machine. The tension is
provided by skiens of horse hair and silk loops twisted which perform the project of the
heavy dart. This model can shoot a dart in a shallow ark for a distince of approximently
35 feet.
In this picture you can see the two twisted skiens (white) and the upright locking rod which holds the onager in the loaded position. The firing trigger is the small green and white rod extending from the bottom of the weapon base.
Onager (Catapult) The Onager was used to throw rocks against a castle or fortification wall. The orange arm is propelled by two loops of twisted skiens which when twisted tightly will eturn the arm and its ball rapidly against the upright and its cushion. This model which is about 9" long will catapult the wooden ball about 25-30 feet
Mantlet
This is a protection device for use in the field to protect the workers operating the siege machines.
Many of these were built and were moved into position to protect the soldiers and workers who were
an important part of the siege.