Engine Limits
Maximum Continuous35 in Man. Press.
2450 RPM
Takeoff Power (ONE MINUTE)40.5 in Man. Press.
2400 RPM
Airspeed Limits (Indicated Air Speed) (from Aircraft Spec A-593)
Level flight or climb185 MPH
Glide or dive216 MPH
Flaps extended 0 to 20 degrees135 MPH
Flaps extended over 20 degrees90 MPH
Performance (from documentation)
Maximum Operating Speed (6000 feet)197 MPH
Cruising Speed (6000 feet, .60 power)152 MPH
Initial climb 700 FPM
Time to 5000 feet7.1 minutes
Time to 10000 feet14.9 minutes
Service Ceiling 18,900 feet
Absolute Ceiling 20,900 feet
Power plant, 4 P&W Twin Wasp R-1830 motors, 850 hp (1000 hp takeoff)3400
hp
Experimental results:
Cruise speed at 1950 rpm, 27 in man press, (.502 power) at 8000 feet
Duration 29 hours, range 3850 miles137 MPH
Cruise speed at 2100 rpm, 31 in man press, (.62 power) at 8000 feet
Duration 23 hours, range 3500 miles152 MPH
Cruise speed at 2250 rpm, 35 in man press, (.70 power) at 8000 feet
Duration 19 hours, range 3100 miles165 MPH
Max speed at 2450 rpm, 41 in man press, (.90 power) at 8000 feet
Duration 14 hours, range 2600 miles187 MPH
Landing Speed (40 deg flaps)67 MPH
Fuel flow per engine to achieve 23 hours duration (10% reserve)
250 pounds per hour
Takeoff time 35 seconds
Takeoff distance (normal temp)3000 ft
Aircraft characteristics (from documentation)
Wing loading weight per square ft 25 lbs
Weight per hp 20 lbs
Wing area2780 sq. ft
Wing span149 ft 0 in
Length87 ft 7 in
Tread of wheels, outside27 ft 9 in
Chord, maximum29 ft
Dihedral3 degrees
Incidence4.5 degrees
Mean Aerodynamic Chord256 in
Span of tail planes45 ft
Prop diameter11 ft 6 in
Crew 10
Armament6 machine guns in 6 turrets
(.30 or .50 cal)
Bomb load 4 x 2000 lb max;
2500 lbs for 3400 mile range
Empty weight37,309 lbs
Gross weight65,068 lbs
Maximum weight70,706 lbs
NOTE: For explanations of speeds used on this tab, see "V-speeds" in the
Learning Center Glossary.
