Nine-cylinder single-row supercharged air-cooled radial engine. 1200 hp Wright R-1820-97 Engines on the port side wing of 'Nine O Nine', a flying B-17G Flying Fortress WW-II bomber from the CollinsFoundation.org at the Fargo Air Museum for the quot;Wings Of Freedomquot; tour.
It would orginally have Hamilton Standard 3-bladed propellers are hydromatically controlled with constant-speed and full feathering provisions. Adjustment of the propeller governors is accomplished individually by cable controls from the cockpit. Feathering and unfeathering is accomplished hydraulically by an electric motor-driven pump mounted on the forward side of the firewall in each engine nacelle.