Hey - I was there! (Nut Tree Airport, I,m from AmCan).

That is, as previously noted, Rudy Frasca's FlugWerk 190, but it is powered by an R2800 C series (split nose case), maybe a CB16? Couldn't see the tag. I believe it is the only one so powered. It's using a standard Ham Stan hub with carved down blades (no idea which blades they started with). Note the lower fuselage/cowl line, looks like the 2800 is just a little large compared to the 801 and ASh 82 versions as the lower cowl seems bulged a bit (the regular Flugwerk cowl is just a bit goofy in several ways anyway). Did you notice the string of oil coolers inside the cowling? As to the three blade prop, at least one of the replicas that are using the ASh-82 (this was used on the La5/7, ironic, eh?) are staying with (temporarily?) the four blade prop (cut down a bit, maybe?) that it comes with from the IL-14 since a failure of Flugwerk's custom three blade prop assembly (one blade went to negative pitch apparently) led to a ditching of a plane in Europe recently.