The Tennis Ball collection

Or: How to tell the story of the evolution of the torsion system by letting kids fire things a a wall to knock it down. Learning can be fun and destructice.

The oxybeles, the ballista, the inswinging ballista and the onager. All of them more portable than anything that came out of the middle ages. Hence i’m leaving my trebs behind for events next year.

These machines will be coming to a public event in Upper Hutt Feb 2011. Bring your kids and a quantity of money for the have a go range. Meanwhile in the main area I’ll be shooting with the larger machines. Or more to the point my crew will be, including my nieces who will be manning (girling?) Chucky next year. Possibly in Greek armour if I can find the money to make it up for them.

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