\\ «.. . ....::>..... . ~ 0«' Constl"uc.t -t'rom '28 ~ClIuje sheet -11-- ,//~ ~ ~/ metal y;'?\i ,- rACINCr +; . = --- I ~ / ~=4 ~--=- = =-..:=-_------ '24" --/F ~ hi 6'1 ~- I / \ \ / / <>~O~ ':J\:J' \ \ / \ / L-/ / - - 1=4 I "«'~ ~ .... 1>< - - - - -47-/- - - - - - - - Fig. 4 Permanent model collar pattern / --,LI \ Fig. 5 Parts of permanent model ready for assembly Drawn by D. Hubbell