The Pratt & Whitney R-1830 Twin Wasp is an American air-cooled radial aircraft engine. It displaces 1,830 cu in (30.0 L) and its bore and stroke are both 5.5 in (140 mm). The design traces its history to 1929 experiments at Pratt & Whitney on twin-row designs. Production began in 1932 and it was widely used during the 1930s.
R-1830 mounted on the left wing of an ex-military Douglas C-47
RAF Dakota's Twin Wasp out for servicing
Pratt & Whitney R-1830 "Twin Wasp" (sectioned)
Short Sunderland
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The Short S.25 Sunderland is a British flying boat patrol bomber, developed and constructed by Short Brothers for the Royal Air Force (RAF). The aircraft took its service name from the town and port of Sunderland in North East England.
Bunk area
The FN13 rear turret of a Sunderland of No 210 Squadron at Oban, August 1940. The Sunderland was the first RAF flying boat to be fitted with power-operated gun turrets.
A mooring compartment was situated in the nose of the Sunderland, containing anchor, winch, boat-hook and ladder. The front turret was designed to slide back, enabling the crew to secure the aircraft to a buoy, as demonstrated here.