After finding the APC data chart I have been using it for all the APC props seems like good ball park data.
I have a MA 5.5x4 will try for speed with the GS V12RR could do 120mph with it.
Engine system is 214g with pipe and prop / spinner.
Next project is to build a plane for the 10 to 15 size aluminum case engines.
Kris you should try the APC 6.3x4 nice robust prop and should make good thrust with the Picco. Perhaps 24k static with 15% nitro.