Lockheed C-69 Constellation

The Lockheed C-69 Constellation was a four engined, propeller-driven military transport aircraft developed during World War Two. 

Variants

XC-69

Unpressurized prototype version, One built.

C-69

Initial troop transport version, 13 built.

Seven others were under construction, but converted to L-049 airliners while still on the assembly line.

C-69A

Troop transport with a different internal layout than the C-69, None built

C-69B

Long range troop and cargo transport with a cargo door on the left, None built.

Company designation L-349.

C-69C

VIP transport version based on the initial C-69.

One built, Company designation L-549.

C-69D

VIP transport with different engines with extra oil and fuel tanks, None built.

XC-69E

Prototype XC-69 converted to use four Pratt & Whitney R-2800 radial engines in place of the original R-3350 for testing purposes.

Specifications

Crew

4

Length

95 ft 2 in (29.01 m)

Wingspan

123 ft (37 m)

Height

22 ft 5 in (6.83 m)

Wing area

1,650 sq ft (153 m2)

Airfoil

Root

NACA 23018

Tip

NACA 4412

Empty weight

50,000 lb (22,680 kg)

Max take-off weight

72,000 lb (32,659 kg)

Powerplant

4 × Wright R-3350-35 Duplex-Cyclone 18-cylinder air-cooled radial piston engines, 2,200 hp (1,600 kW) each

Propellers

3-bladed constant-speed propellers

Performance

Maximum speed

330 mph (530 km/h, 290 kn) at 10,000 ft (3,048 m)

Cruise speed

227 mph (365 km/h, 197 kn)

Range

2,400 mi (3,900 km, 2,100 nmi)

Service ceiling

25,030 ft (7,630 m).