Crew: Five, including pilot, co-pilot, flight engineer and 2 flight attendants
Capacity: Daytime seating for 33, nighttime capacity 25, in 16 berths and 9 reclining chairs
Length: 74 ft 4 in (22.66 m)
Wingspan: 107 ft 3 in (32.69 m)
Wing chord: 19 ft 0 in (5.79 m) at root and 9 ft 4.5 in (2.858 m) at tip rib
Height: 20 ft 9 in (6.32 m) at rudder
Undercarriage track: 295 in (7.5 m)
Wing area: 1,486 sq ft (138.1 m2)
Airfoil: NACA 0018 at root, NACA 0010 at tip
Wing dihedral: 4.5° from chord line
Wing incidence: 3.5° constant root to tip
Empty weight: 30,000 lb (13,608 kg) to 31,200 lb (14,200 kg) in overload condition.
Gross weight: 45,000 lb (20,412 kg)
Maximum load: 15,000 lb (6,800 kg), with 30 passengers, 650 lbs of baggage and 1,275 US gal (4,830 l; 1,062 imp gal)/5,750 lb (2,610 kg) of fuel,
Fuel capacity: 1,275 US gal (4,830 l; 1,062 imp gal) normal, carried within the wings. Overload up to 1,800 US gal (6,800 l; 1,500 imp gal)
Fuel consumption: 200 US gal (760 l; 170 imp gal)/hr
Oil capacity: 100–180 US gal (380–680 l; 83–150 imp gal)
Powerplant: 4 × Wright GR-1820-G105A Cyclone air-cooled radial engines with two-stage superchargers, 1,100 hp (820 kW) each @ 2400rpm for sea level takeoff, reduced to 900 hp (670 kW) @ 2300rpm at 17,300 ft (5,300 m)
Propellers: 3-bladed Hamilton Standard all-metal Hydromatic constant-speed propellers, 11 ft 6 in (3.51 m) diameter
Performance
Maximum speed: 250 mph (400 km/h, 220 kn) at 16,200 ft (4,900 m)
Cruise speed: 222 mph (357 km/h, 193 kn) at 19,000 ft (5,800 m) & 75% power
Minimum control speed: 70 mph (110 km/h, 61 kn) with flaps
Takeofff run: 1,800 ft (550 m)
Landing run: 2,050 ft (620 m)
Range: 1,300 mi (2,100 km, 1,100 nmi) at 19,000 ft (5,800 m) & 75% power
Service ceiling: 23,800 ft (7,300 m) , reduced to 18,000 ft (5,500 m) when on three engines
Cruising altitude: 15,000–20,000 ft (4,600–6,100 m)
Absolute ceiling: 25,200 ft (7,700 m)
Rate of climb: 1,200 ft/min (6.1 m/s) initial, from sea level
Wing loading: 30 lb/sq ft (150 kg/m)
Power loading: 12.5 lb/hp (7.6 kg/kW) take off, 10.25 lb/hp (6.23 kg/kW) cruise
300
Original unpressurized 35,200 lb (16,000 kg) proposal with seating for 16-24 passengers which began as a four-engined Boeing 247.
PAA-307 or S-307 Strato-Clipper
Designation for three aircraft built for Pan Am under ATC 719. Visible external differences included engine cowlings without cowl flaps. Four 1,100 hp (820 kW) Wright GR-1820-G102A Cyclone engines were fitted, with single-speed superchargers. Crew of six. Strato-Clipper was Pan Am’s name for the type.
SA-307B
Designation for five aircraft built for T&WA under ATC 726. These differed externally from the Pan Am aircraft in having large external flap actuators. Four 1,100 hp (820 kW) Wright GR-1820-G105A Cyclone engines were fitted, with two-speed superchargers. Crew of five.
SB-307B
Designation for one uncertified aircraft built for Howard Hughes.
C-75
Five Trans World SA-307Bs were impressed into the USAAF. The cabin pressurization was removed to save weight, and the external flap actuators replaced.
SA-307B-1
The C-75s were overhauled and updated with modified B-17G wings (with 307 wing slots) and larger tailplanes mounted further aft. 1,200 hp (890 kW) Wright GR-1820-G205A Cyclone engines were fitted, along with B-29 electrical systems.
307C
50 passenger development with more powerful versions of the same Cyclone engines, boosted to 1,350 hp (1,010 kW). Boeing wanted $267,230 + 13,000 per engine (or $319,230) but development was cancelled in favour of the 377 Stratocruiser, based on the B-29.
316
Airliner project developed from the XB-15 with pressurized cabin similar to that used on the Stratoliners, offered to KLM as a larger Stratoliner but not followed through with.
322
Development of 307 with similar fuselage but with a mid-mounted wing and a nosewheel, as a bomber. Eventually evolved into the B-29.
