RE: Help with S52A ASP 2-Stroke Glow Engine
I have used APC 12x4's and 12.25 x 3.75's on mine...should be a good prop for that engine and airframe combination too.
The 12 x 4 is lighter and puts less load on the engine...would be ok for break-in. Mine revs to 14,000+ with a Tower muffler.
Mine likes a warmer plug...so I would suggest the A5 if that's the one that's most convienient for you. (I use Fox std. long in mine )