I've just installed the Accusim Core Update 1.3 on top of my WOP P-40 + Accusim installation. The update seems to have gone okay, with no errors returned or anything. However, after the update my P-40 now gains about 50-70 knots extra airspeed than it did at the same power settings before Accusim 1.3 was installed. In addition, I am having a HECK of a time slowing my P-40 down for landing approach after Accsusim Core Update 1.3.
Using manifold pressure settings of just over 10 inches and prop rpm at less than 1800, I can now barely slow her down to 180 knots in level, clean flight. I think something went wrong someplace.
Whatever the problem, it sure seems like the P-40 got extremely slippery after Accusim 1.3. I'm not sure if there is an isolated problem on my particular installation, or if there is a bug with the P-40 and the new core update not meshing correctly.
Also, I've only tested the AVG P-40B variants so far.