it is...
and apparently we have the oldest working one in Warwick Castle
/re-enactment blog
(
Chorizowagon Came wandering back on,
Wed 18 Oct 2006, 13:10,
archived)
my brother made one out of lego
it was about a meter tall, launched 3" diameter stones at a variable angle and dented a door
(
UltimateStoat thanks you for helping him help you help us all,
Wed 18 Oct 2006, 13:43,
archived)