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2017-11-20

  Article  

     
     
 

BOEING B-29 PERFORMANCES

 
     
  Copied from 6th Bomber Group and reproduced here for reasons of convenience  
     
  Back to:  B-29D Background  BB29H85 Supercastle  -  -  
     

The B-29 was one of the largest WWII bombers powered by 4 of the most powerful engines.  Over the course of the war, the 6th Bomb Group received almost 120 aircraft.  Most of these aircraft were standard B-29s.  The includes 32 B-29As and 2 B-29Bs

DIMENSIONS

POWERPLANT

Wingspan
Length
Height
141'03"
99'00"
27'09"
Wing area
Aspect ratio
Airfoil
1736 ft²
11.58
Boeing 117

Four Wright R-3350-41 Duplex Cyclone 18-cylinder air-cooled radial engines each with two General Electric turbo superchargers, delivering 2,200 hp for takeoff with an emergency rating of 2,300 hp at 25,000 ft.

RANGE - Published Figures OTHER BOMBERS
Ferry range (no bombs) 5,830 miles 5,065.nmi B-17G Flying fortress 3,750 miles 3260.nmi
Combat range (5,000 lbs bombs) 3,250 miles 2824.nmi B-24J Liberator 2,100 miles 1824.nmi
A-683 Lancaster MkIII 1,040 miles 904.nmi
WEIGHTS - Published Figures OTHER BOMBERS
Empty 69,000 lbs 40×500lb 20,000 lb B-17G Flying fortress 16×500lb 8000 lb
Loaded 137,000 lbs B-24J Liberator 8×500lb 4000 lb
A-683 Lancaster MkIII 28×500lb 14000 lb
Figure 79 - Weight and Balance Diagram

FUEL CAPACITY AND RANGE

Quantity Weight Range¹ Range¹

Regular wing tanks

5608.US gal

33648.lb

2480.miles

2155.nmi

Auxiliary center wing tanks

1332.US gal

7992.lb

590.miles

513.nmi

Standard total fuel load

6940.US gal

41640.lb

3070.miles

2667.nmi

Bomb bay tanks (2 × 640.US gal) ²

1280.US gal

7680.lb

565.miles

491.nmi

Maximum fuel load (combat)

8220.US gal

49320.lb

3635.miles

3158.nmi

Bomb bay tanks (2 × 640.US gal) ²

1280.US gal

7680.lb

565.miles

491.nmi

Maximum fuel load (ferry)

9500.US gal

57000.lb

4200.miles

3649.nmi

¹

Range will vary widely with bombload (see published figures below). The computation above assumes a fuel burn of 475 gph at 220 mph. This appears to correlate well with actual performance

²

Each long range tank held 640 gals. Each bomb bay could hold 2, for a total of 4 max. However, with 4, there was no room for bombs. Thus, you would only use 4 on a ferry flight and 2 on a bombing mission

On long-range missions, the planes carried auxiliary fuel tanks in the rear bomb-bay.  These are sometimes incorrectly described as "Tokyo Tanks".  However, the name was already used to describe B-17 long range tanks which ... never flew to Tokyo.

BOMBLOAD

-

-

-

Quantity

Unit Weight

Total Load

AN-M30

GP

-

-

80

100.lb

8000.lb

AN-M57

GP

-

-

56

250.lb

14000.lb

AN-M31

Demolition

-

-

56

300.lb

16800.lb

AN-M64

GP

-

-

40

500.lb

20000.lb

AN-M65

GP

-

-

12

1000.lb

12000.lb

AN-Mk1

Armor piercing

-

-

12

1600.lb

19200.lb

AN-M66

GP

-

-

8

2000.lb

16000.lb

AN-M56

Demolition

Light case

-

4

4000.lb

16000.lb

AN-M47A2

Incendiary

-

-

80

100.lb

8000.lb

AN-M19

Incendiary

-

-

56

220.lb

12320.lb

Mk 26

Mine

-

-

12

1000.lb

12000.lb

Mk 36

Mine

-

-

12

1000.lb

12000.lb

Mk 24

Mine

-

-

8

2000.lb

16000.lb

???

Photo-flash

(added)

-

3

100.lb

300.lb

M-19

Leaflets

-

-

 

?....lb

?....lb

DEFENSIVE

ARMAMENT

Quantity Gun Weight Ammunition

lb/500

Total Load

Turret #1

Upper forward

4 × M2/AN 84 lb 500 rpg

144 lb

912 lb

Turret #2

Upper rear

2 × M2/AN 84 lb 500 rpg

144 lb

456 lb

Turret #3

Lower forward

2 × M2/AN 84 lb 500 rpg

144 lb

456 lb

Turret #4

Lower forward

2 × M2/AN 84 lb 500 rpg

144 lb

456 lb

Turret #5

Tail

3 × M2/AN 84 lb 500 rpg

144 lb

684 lb

           

2964 lb

HYPOTHETICAL MISSION TO TOKYO

The following should give you a rough idea of the extent to which the Groups were pushing the envelope.  Normally, you compute the fuel needed to complete a mission with a safe reserve and then add enough bombs to safely stay within gross weight.  The aircraft will have a partial fuel load and a partial bomb load.

In the case of the B-29, the Groups kept adding more fuel and more bombs until they reached the maximum capacities of the aircraft.  There was nothing more to add.  And, yet, the planes still flew !

SUMMARY

Qty

Weight

Weight

Range

Weight

Empty

-

-

78800lb

-

Crew

-

11

200  lb

2200lb

-

Fuel load

Std

6940 US

6  lb

41640lb

3070 mi

Bombs

Max.

40×

500  lb

20000lb

-

Ammos

100 rpg

×13

0.3 lb

390lb

-

Totals

-

-

-

143030lb

3070 mi

Radius

Combat

-

-

-

1535.mi

Radius

Required

-

-

-

1465.mi

Fuel

Reserve

-

-

-

40.min

And for those preferring to see distances expressed in nautical miles:

SUMMARY

Qty

Weight

Weight

Range

Weight

Empty

-

-

78800lb

-

Crew

-

11

200  lb

2200lb

-

Fuel load

Std

6940 US

6  lb

41640lb

2667.nmi

Bombs

Max.

40×

500  lb

20000lb

-

Ammos

100 rpg

×13

0.3 lb

390lb

-

Totals

-

-

-

143030lb

2667.nmi

Radius

Combat

-

-

-

1224.nmi

Radius

Required

-

-

-

1273.nmi

Fuel

Reserve

-

-

-

40 min

Or in kilometres :

SUMMARY

Qty

Weight

Weight

Range

Weight

Empty

-

-

78800lb

-

Crew

-

11

200  lb

2200lb

-

Fuel load

Std

6940 US

6  lb

41640lb

4940 km

Bombs

Max.

40×

500  lb

20000lb

-

Ammos

100 rpg

×13

0.3 lb

390lb

-

Totals

-

-

-

143030lb

4940 km

Radius

Combat

-

-

-

2470.km

Radius

Required

-

-

-

2357.km

Fuel

Reserve

-

-

-

40.min

 
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