You're going to find that for static testing of props in the 8 to 12 inch diameter range once you get much over a 4 inch pitch that the blades will stall and pull a large turbulent bubble with them. You'll actually hear the difference between examples with a 4, 5 and 6 inch pitch as all the 4's will operate unstalled, some of the 5's will stall while others don't and the 6 inch pitch props are all stalled when tested in the static mode. When in that mode the thrust per watt of input power drops radically due to much of the power being used to fight the drag instead of moving air.
Moving up to the 14 to 18 inch diameter range I found from static testing that the critical angle altered a little to up around 8 inch pitch for running unstalled with a 10 inch pitch being stalled again.
Such props can be used for strong climbing flight or for models that hover. But they tend to be too low an advance ratio for any sort of faster flying. For that you need higher pitch ratios. And to allow testing them you need to test in a flowing airstream or figure out some way of simulating a moving plane.
Perhaps mount the motor on a rotating arm which allows you to rotate at a suitable airspeed? Make the arm quite long so the air has a few seconds to calm down before the arm comes around again. A brake on the rotor shaft could allow you to simulate the aerodynamic drag of different airframes or air speed reduction due to different climb angles.