title wheel - tire, felly, spokes and wheel-nave
  parameter
    eps  4
    rad1 300            c wheel nave to tire
    rad2 25             c radius of tire
    rad5 [%rad1-%rad2] 
    sig [%rad2*3/(4*sqrt(2))]
    rad4 [%rad5*cos(80)] c outer radius of wheel nave
    rad3 20              c inner radius of wheel nave
    rad6 10
    wnl 40               c half length of wheel nave
    rad7 [%wnl*(%rad5-%rad3)/(%rad5-%rad4)];
c felly
  cylinder -1;1 289;1 9;
            [%rad1-%sig-%eps] 0 360 [-%sig] %sig 
  mate 1 thic 1 
  sfi -1;;;ts 0 0 0 0 0 1 [%rad1-%eps] 0 %rad2 
  endpart
c tire
  cylinder 1 2 6 7; 1 145; 1 2 6 7;
    [%rad1-%sig] [%rad1-%sig] [%rad1+%sig] [%rad1+%sig]
    0 360 [-%sig] [-%sig] %sig %sig
  mate 2 
  dei 1 2 0 3 4;;1 2 0 3 4;
  sfi -1 -4;;-1 -4;ts 0 0 0 0 0 1 %rad1 0 %rad2 
  endpart
c wheel nave
  cylinder 1 3; 1 37; 1 3;
    %rad6 %rad3 0 360 [-%rad7] %rad7
  mate 3 
  endpart
c start of global replication
  gct 1 rxy rz 10; lev 1 grep 0 1;; pslv 1   
c spoke plates
  cylinder 1 6; 1 37; -1; %rad3 %rad4 0 360 %wnl
  pb 1 0 0 1 0 0 z %rad7
  mate 3 
  endpart
c spokes
  beam 
  cy [%rad5*.5] 10 [%wnl*.5];
  cy %rad4  100 %wnl;
  cy %rad5  20 0;
  cy %rad4 -80 %wnl;
  cy %rad5   0 0;
  bm 2 3 3 4 1 1 ;
  bm 4 5 3 4 1 1;
  lct 8 rz 40;repe 8; lrep 0 1 2 3 4 5 6 7 8;
  endpart
c end of global replication
  pplv 

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