Hi guys,

I am looking to build a couple props this year using steel tube that when powered with a pneumatic will move.

I'd like this to be about the height of a chair then jump up to about 7' tall.

Does anyone have a website that will be a starting point for the design of the 4 link design to get the math and angles for me.

I have seen a couple that i can drag the mechinisum to see its movement.

Thanks Guys!