Think Veeps is right - AN12s seems more likely. Hope to be wrong though.
Thought I heard the grind of the -22 the other day but was disappointed. Looking forward to another crockery rattling overflight, the lower (and more shards of smashed "porcelain" as I like to describe my cheapo plates) the better.
I like piston props best, but over the top turbines are all right too!