Ok, some co-ordinates from the specimen loadsheet for 737-800
according to our ops part b......
Therefore the following data can be used (crudely) to plt fwd limit, with index units scale across top of chart and gw
down the side....
gw 60t = 6 units
70t = 10
75t = 18
79t = 31
The forward limit is a steep gradient until near MTOW where it flattens off, hence the jump from 18 to 31 units.
and aft limit....
60t = 80 units
65t = 84 units
70t = 94 units
75t = 88 units
79t = 62 units
and again with the aft limit at MTOW 79t the aft trim range is considerably reduced, and at mtow 79T the mac range on the trim graph runs from 16% to 25%, but between 79t and 72t the mac runs from 25% to 34% mac.
I tried to incorporate said chart onto this post but my computer skills are somewhat remedial....!
rgds FH