The top and bottom platform of every level is triangular, made up of three struts of

equal length, fixed to one another. Every level consists of twelve struts, where the top

and bottom platform consist of six struts. Three struts are vertically arranged linking the

corresponding vertices of the triangular shaped platforms with ball joints. Three other

struts are at an angle, linking two different vertices of corresponding sides of the top and

bottom platform with ball joints.

4.1.2 Mast II

 This is a mast based on the optimized platform of Jaehoon Lee [8]. This mast,

constructed with struts and ball joints, consists of two levels with the same configuration

arranged one over another in a fashion where the top level is inverted with respect to the

bottom level (Figure 4-2).


Figure 4-2. Mast II