On Feb 19, 2:15 pm, "weasel"
Looks like a 9-cylinder Wright R-1820 Cyclone (G?) rather severely cut-
away.

(wouldn't bet the farm on it tho')

Wes

My bad-

Yes, it's an R-2800, Pratt&Whitney 18 cylinder radial.
(It would've been nice if the second row was visible!!)

Wes