Hi, I'm wondering if anyone uses this forum anymore, since the last topic date was such a long time ago…
Anyway, here's the plan so far. We are using pre-treated 4x4s for the frame, the base is 5' by 10', 12' high at the axle with a 16' sling arm. We found a good piece of 1 1/2 inch steel pipe that's 6', so we have enough to either cut down or keep some extra, depending, that we will be using for the axle. We will be using a 55 gallon drum filled with water for the counterweight.
What we are trying to figure out is the idea of using bearings for the axle to reduce the friction. Either by fitting a pipe around the axle at the sling arm and putting bearings in it, or fitting pipe around the ends of the axle and having the bearings there.
Our biggest question is, if we use bearings on the ends of the axle will the weight make it malfunction? Or if we put the bearings at the sling arm?
This is our first shot at making one of this size, we have made a small tabletop trebuchet but it doesn't compare to what this thing will be!
If anyone reads this, I really appreciate it.