Project Mars Emperor Titan - feet

The Mars emperor titan is now starting to take shape.  The most important part of this build with be the legs and feet as this will ultimately be carrying alot of weight considering the emperor titan has a cathedral literally as the top structure (estimating all the plastic will weigh upward of 20kgs).  I will be trying to hollow out or use as little volume to minimise the weight especially in the top structure).

The feet is cut out from egg grate and measures around 30cm (this is 21 egg grate squares from edge to edge)

I managed to find an australian seller of wooden balls called wood bits and bobs (http://woodbits.com.au).  For the feet joints, I will be using 2 x 2" wooden balls as the sockets.  This will be built up using egg grate and plastic card to ensure a tight socket joint.

Before making up the housing, I will be pre-drilling the wooden balls to allow some nuts to fit in first.  A forstner drill bit is handy to create a slot for the nut to fit in.

To make the legs strong I will be using threaded metal rods which will screw in the feet and hip joints and carry the load so to speak once the top structure is built.

Pics of the socket joint and threads in next post