Seems there are many caveats to how AC performance is modeled in AH. There doesn't seem to be a "standard." For example, some are modeled if HO fuel was available in the field, others not for balance reasons.
The D11's in the field were not equipped with Hamilton "paddle blade" props from the factory but were equipped at airfields by representatives from Republic and by unit maintenance crews. This prop gave the D11 a significant boost in climb rate. Of course, this has been discussed on this forum several times. The fact remains, the Hamilton Standard prop is not modeled on the D11 in AH.