Here's some sneak peek bits of our trebuchet. A video *should* be coming, as well as more pics.
It used an ~ 4.5 kg cinder block as its counter-weight, and could hurl a baseball 30-50 feet (averaged around 45 ft) at around 30 mph. The whole thing (arm attached) is about 7 ft tall. The axle is a steel bar going through a pair of bearings on either side supporting beam.
It is pretty darn sweet :)
Hopefully more to come later.
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