The Evolution TPS engine is a good engine. It comes with a 10.5x4 three blade prop, three blade spinner, and a flywheel drive washer. If purchased separate from the plane it will also have a standard drive washer. Most people switch to a two blade prop and spinner when they brake the included three blade model. I broke mine on my first landing on my own. A APC 10x7, two inch spinner and standard drive washer worked well for me. The 10 inch prop gave me a little more ground clearance over an 11 inch prop.

The Evolution .45 has an A on the head, the .40NT has 40 on the head and the .46 has 46 on the head.