Basically a large static version of the Fustibalus (staff sling) it has no counterweight, but relies on the Crew to pull both down and back to launch the Missile, which makes it a traction operated weapon.
Perriers range from a small, one-person devices to ones pulled by many soldiers or even a team of horses. At any size the traction-powered Perrier was a quite effective weapon because it could be reloaded and fired relatively quickly.
The only Definition I can find for the word Perrier is this one;
|n.||1.||(Mil.) A short mortar used formerly for throwing stone shot.|
The Perrier is made from balsawood, a cocktail stick and two pins,
The two Crewmen come from the Zvezda Medieval Heavy Bombard set.
Even though the device looks big, I reckon two would be enough if the arm was balanced correctly it would, even loaded, only need a small amount of force to get it moving.
I´ve left it looking a bit rough and ready, not cutting off the planks flush with the main Support Frame.
Here´s a short Video of a Perrier being demonstrated at the Tower of London.
They are powering it with 4 People, two..one at each side and the other two right under the arm!! This means they have to duck down to avoid being hit with the pulling end of the arm!!
Better to do it like this lot.