BOEING XB-15
REFERENCE INFORMATION

For standard procedures, see the Checklists tab.  

Total Flight Simulator aircraft weight with full fuel  

68,900 lbs

Fuel capacity (4 tanks)

4200 gals
(25200 lbs)

NOTE: To adjust fuel load, on the Aircraft menu, click Fuel and Load.
 

VS - Stalling Speed no flaps

80 MPH

VSO - Stalling Speed in Landing Configuration  

65 MPH

VY - Best Rate-of-Climb Speed (sea level)

.75 power, 750 FPM

120 MPH


VR - Rotation Speed
Standard temperature, sea level pressure altitude  

68,000 lbs  
10 deg flaps

87 MPH


V2 - Minimum Climb Speed
Standard temperature, sea level pressure altitude  

68,000 lbs  

100 MPH

 

Engine Limits

Maximum Continuous - 850 hp

41 in Man. Press.

2450 RPM

Takeoff Power (ONE MINUTE) - 1000 hp

45 in Man. Press.

2550 RPM

 

Airspeed Limits (Indicated Air Speed)

Level flight or climb

197 MPH

Glide or dive

216 MPH

Flaps extended 0 to 20 degrees

135 MPH

Flaps extended over 20 degrees

90 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 feet

7.1 minutes

 

Time to 10000 feet

14.9 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 miles

137 MPH

Cruise speed at 2100 rpm, 31 in man press, (.62 power) at 8000 feet

Duration 23 hours, range 3500 miles

152 MPH

Cruise speed at 2250 rpm, 35 in man press, (.70 power) at 8000 feet

Duration 19 hours, range 3100 miles

165 MPH

Max speed at 2450 rpm, 41 in man press, (.90 power) at 8000 feet

Duration 14 hours, range 2600 miles

187 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 area

2780 sq. ft

Wing span

149 ft 0 in

Length

87 ft 7 in

Tread of wheels, outside

27 ft 9 in

Chord, maximum

29 ft

Dihedral

3 degrees

Incidence

4.5 degrees

Mean Aerodynamic Chord

256 in

Span of tail planes

45 ft

Prop diameter

11 ft 6 in

 

Crew

10

Armament

6 machine guns in 6 turrets

(.30 or .50 cal)

Bomb load

 4 x 2000 lb max;

 

2500 lbs for 3400 mile range

Empty weight

37,309 lbs

Gross weight

65,068 lbs

Maximum weight

70,706 lbs

NOTE: For explanations of speeds used on this tab, see "V-speeds" in the Learning Center Glossary.