The minimum requirement for achieving {HEAD ~ a three dimensionally rigid connection} using {TAIL ~ just three sheet flexures} is that no two sheet flexures be coplanar 
The minimum requirement for achieving { HEAD ~ a three dimensionally rigid connection } using { TAIL ~ just three sheet flexures } is that no two sheet flexures be coplanar
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH