Doc, you make a good point, one peice of information is invalid by itself,, you need to know the whole packag
I have run many LA 46 engines, some or the airframes, let me think, Brodak P-40 ARF at 54 oz,, my Gee Bee ( based upon a P-40 Brodak wing) 51 oz, a P-40 Q model ( hmm a trend, based on a brodak P-40 ARC at 59 gulp oz, an Oriental at 43 oz, Pat Johnstons Shark 35, ( not sure but really light)
On all of these, the same combo seemed to work very well,
.275 venturi, Powermaster 10 x 22 ( 50% castor 50% synth oil) ST needle valve assem, APC 12.25 x 3.75 prop. Launch about 9600 to 9800 rpm and smile! In all fairness, Pat replicated the APC in wood on his birds but he started with the APC. Its a very solid combination at altitudes from sea level to 2800 feet and temps up to and over 100 degrees. Its my go to prop on any LA 46 setup.