OK Kilwhang, here's an attempt by one retired AGE, I'm sure the intelligent one will be along sometime;
C130 wing area
1745 sq ft
Ice 1 cubic inch = 0.03 lbs
1 sq foot of Ice = 144 blocks = 4.32 lbs (per square foot at 1" thick)
4.32 lbs x 1745 = 7538.4 lbs or 3.365 tons.
At around 3.5 tons of extra weight, with a still decent fuel load plus freight, there's no wonder your climb stopped. Possibly assisted by profile drag and a total change in the aerofoil section. Hope that's near to correct.
Don Coyote, thanks for that. I ended my time as an AGE in 94, preceding the ice patches, thus the reason for my ignorance of them.
Smudge
