Sikorsky Aircraft Corporation, Bridgeport, Connecticut
Specifications from Aero Digest, April, 1935:
• Thirty-seven place high-wing seaplane. ATC 544. Four P. & W. S5D-1G Hornet engines, 700 horsepower each.
Span 114 feet 2 inches. Length overall 67 feet 8 inches. Height overall 17 feet 4 inches. Wing area 1330 square feet. Power loading 13.57 pounds per horsepower. Wing loading 28.58 pounds per square foot.
Empty weight 21,945 pounds. Useful load 16,055 pounds. Payload 8060 pounds. Gross weight 38,000 pounds. Fuel capacity 1240 gallons. Oil capacity 74 gallons.
Maximum speed at sea level 180 miles per hour. Cruising speed at sea level 160 miles per hour. Landing speed 65 miles per hour. Service ceiling 16,000 feet. Rate of climb 1000 feet per minute. Cruising range 1200 miles.
Hull: two-step type, long stern, 9 water-tight compartments; structure consists of deep keel, widely spaced transverse frames and heavy stringers; metal structure, metal covered; anchor compartment in bow, next aft pilots’ compartment, third compartment for baggage and express, next four compartments accommodate 8 passengers each,. rearward of last passenger compartment are 2 lavatories, the eighth compartment contains the main entrance and accommodations for the steward. Wing ~ two-spar construction; compression struts, and stressed-metal skin covering on both sides of wing forward of rear spar; rear of rear spar fabric covered: hydraulically-operated flap of metal structure, fabric covered; flush-rivetting all over. Tail group: metal construction, fabric covered; horizontal surfaces, twin fins and rudder supported by hull and side struts. Fafnir bearings for all controls.
Standard equipment includes Exide battery, Pyle National navigation lights, General Electric landing lights, Hamilton Standard controllable-pitch propellers. Instruments by Kollsman, Pioneer, Lewis, General Electric, Sperry, Eclipse.