title: Sikorsky S-45
text: # Sikorsky S-45
  
  The Sikorsky S-45 was a proposed double-deck transoceanic flying boat originally designed in 1938 by Sikorsky Aircraft for Pan Am. The high wing monoplane featured a single-step hull with a triple-tail and was to be powered by six Wright R-3350 Duplex-Cyclone engines which were being developed at the time. The aircraft would have competed with the Boeing 314 but no examples of the S-45 were ever manufactured.
  
  ## Specifications
  
  Data from Global Security
  
  General characteristics
  
  * Capacity: 100 passengers
  * Length: 155.5 ft (47.4 m)
  * Wingspan: 236 ft (72 m)
  * Height: 25.75 ft (7.85 m)
  * Wing area: 4,670 sq ft (434 $m^2)$
  * Empty weight: 34,930 lb (15,844 kg)
  * Gross weight: 87,000 lb (39,463 kg)
  * Powerplant: 6 × Wright R-3350 Duplex-Cyclone Air-cooled 18-cylinder radial engines, 2,500 hp (1,900 kW) each
  
  Performance
  
  * Cruise speed: 200 mph (320 km/h, 170 kn)
  * Range: 5,000 mi (8,000 km, 4,300 nmi)
  