View Single Post
  #9  
Old 08-11-2007, 08:03 AM
Roger Davis's Avatar
Roger Davis
Registered User

Roger Davis is offline
 
Join Date: Nov 2004
Location: Sydney
Posts: 300
5mm would be ample. Strength across the diameter is not a function of wall thickness.
Foundry sand/Refractory sand ,close enough to the same thing.
Pyramid rightway up, but truncated. Picture the Giza pyramid with a plateau or mesa on top.
Reply With Quote