I was reading an article about the 2 of the 3 cores arriving by barge from Decatur at CCAFS and it noted that the two would be the Starboard and center cores.
This made me wonder what differences in the core stages might exist. That is, do they build the three cores differently for a Delta 4 Heavy launch?
I know one of the critiques for the Delta 4 performance wise is that the mount points for the solid rocket boosters apparently are heavy, and are there on every launch, even those not using it. Somehow Atlas V differs in its mounting of solid boosters that does not carry a similar penalty.
So does the center core require additional structure to attach a core to either side, or is it already built into all the common core boosters?
My ultimate question that I am looking to get answered is: Are the CBC modules in a three core Delta 4 Heavy interchangeable?