parts

I've been doing a lot of on-line research at sites like www.societyofrobots.com, www.mcmaster.com, and carlpisaturo.com and I'm still trying to decide exactly what types of materials I will use.  I want to use materials that are light weight, low cost, relatively easy to work with, and are able to resist the corrosive effects of the out-doors.  One of my main problems is that, when I look at the sheer variety of parts available on the Internet, I am very overwhelmed.  Often, at sites such as mcmaster, the specified tolerances for parts far exceed the requirements of a backyard slow-moving robo-tortoise and seem more suited for use in an outer space probe.  Perhaps, in the future, if I ever acquire the funds and desire to develop a space tortoise, I'll go in that direction, but, for now, I think I will need to consider an alternative source of relatively light weight materials.

One possible source of materials that I've been considering are two broken bicycles that I haven't gotten around to recycling.  It is possible that, with some ingenuity, I could obtain a significant portion of the parts that I need.  This is all still largely undecided, but I will update when I've made a selection.