The propeller that comes with the Hobbico NexSTAR is NOT a Master Airscrew propeller. It is a purposely designed glass-filled nylon 11x5 propeller that, tested under the same conditions with the same fuel (15%wildcat) and engine(OS 46 FXi), delivers more static thrust than the APC 11x5. The main tool used for design was the momentum-blade theory. The NexSTAR prop delivers 6lb-11oz of thrust and the APC 5lb-14 oz. Anyone should be able to verify this by doing a simple propeller test.