load mass 
12.2    18.2
14.6    17.5
15.8    7.22
25.3    30.6
38.6    6.66
76.4    6.14
163     5.21
182     .502
415     .611
446     .630
628     .427
377     .011
770     .012
1446    .006
1012    .002