Was looking up c of g on certain loaded railcars; example, found that a UP loaded center beam ( I assume lumber) was 97, close to the max allowed of 98. Could not find c of g listed of locomotives, maybe this is not a relative statistic. Would think their c of g would be rather low, given their heavy frame and trucks.
I recall seeing a UP document where the CG of the 800 series steam locomotives was 84 inches ATR. They were concerned about the CG being that high. I do not know what the typical diesel loco CG is, but I would guess 50 inches ATR or less.
So CG on full-height doublestack cars is supposed to be at least 12 feet below the top of the load?
If UP 4-8-4 CG was 84 inches above rail, that was probably typical for steam? Nothing unusual about them.
When doing dynamic modeling of locos at EMD, we used crankshaft height as an approximation of CG height. For an SD40-2 that is about 83.5" with new wheels.
Dave
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