Douglas DC-1
Technical Specifications

First Flight: July 1, 1933
Number Built: 1 as proto-type for TWA (test-bed for DC-2)
Length: 60 feet 
Wing Span: 56 feet 
Height: 16 feet 
Max Take-Off Wt.: 17,500 lbs. 
Max Landing Wt.: N/A
Empty Wt.: 11,140 lbs.
Max Cruising Speed: 212 mph   184 kts
Normal Cruising Speed: 190 mph   165 kts
Stall Speed: N/A
Service Ceiling: 23,000 feet
Fuel Capacity: 510 US gallons 
Range: 1000 miles 
Fuel Type: 87 octane
Fuel Consumption: 97 gph both flight plan burn
Engines: 2 Wright Cyclone SGR-1820-F 
rated @ 710 HP each
Seating: 12 Passengers
Crew: 2 Pilots and 1 Flight Attendent
Engine Specifications
 Wright Cyclone SGR-1820-F
Type: 9 cylinder air cooled radial
Length: 47.69 inches
Bore: 6.125 inches
Stroke: 6.875 inches
Displacement: 1820 cubic inches
Compression Ratio: 6.8 to 1
Dry Weight: 1365 lbs.
Ignition: Scintilla S9LU-5
Fuel Grade: 87 octane
Carburation: Stromberg PD12
Performance: 710 HP, geared 16:11 @ 1950 rpm @ 8000 ft