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2017-11-20

BACKGROUND NOTES

 
     
 

BOEING  B-29  and  B-50  Superfortress

 
     
  The story which did happen ... outside Atlantic Air Combat  
     
  See also :  B-29H Background - Main
 P2B-2 Background
 Tu-4B Background
 KJ-1A Background
 KC-97 Background - Main
 C-97A.Background
 B-377 Background
B-29A Performances
BB29H85. Summary - also covering
P2B3S90 TP04B10 TP04W75
M097M30 K097M40 377F100
Related page :  BB29H85.Supercastle
 P2B3S90.Supercastle
 TP04B10.Bust
 TP04W75.Maze
 K097M30.Astrotanker
 M097M30.Astrolifter
 377F100.Astroliner
 
 

INTRODUCTION

The Boeing B-29 Superfortress was a WWII piston engined heavy bomber.  Deployed in the Pacific theatre it infamoulsy entered history for dropping atomic bombs on Hiroshima and Nagasaki.  The type saw action again during the Korean war and briefly served with the RAF.  More importantly, the Soviet Union reverse-engineered the design which entered production as the Tupolev Tu-4

Variants

Among the many variants, experimental and developement airframes, the following are of particular interest :
B-29 Original production variant
B-29A Different wing and 4 guns in a streamlined upper forward turret.  Used in the Korean war and by the RAF as the Washington B Mk 1.
B-29B Designed for low level raids on Japan.  Defensive guns removed but in the tail where the 20mm gun gave way to a 3rd .50cal gun.
B-29C A variant to be powered by an improved version of the Wright R-3350 engine - none were built
B-29D Improved variant with P&W R-4360-35 engines.   Initially designated XB-44, it lead the way to the similarly powered B-50 series.
RB29J Also designated F-13A, a few airframes modified to photo-reconnaissance.  Served till the mid '50s with the 91th SRW (Yokota AB).
SB-29 A version adapted for air-sea rescue.  16 airframes modified to carry a droppable self-righting A-3 lifeboat under the fuselage
WB-29 Weather reconnaissance aircraft
P2B Four airframes acquired by the USN as patrol bombers (P2B-1S).  These were B-29-95-BW 45-21789 as #84028, B-29.... as #84029, B-29-95-BW 45-21791 as #84030, and B-29-90-BW 44-87766 as #84031.  BuNo 84030 and 84031 were later modified into ASW platforms and redesignated P2B-2S.
XB-39 A single prototype powered by four water-cooled 2,600 hp Allison V-3420-17 24 cylinders Vee type engines - Photo
B-50A

A continuation of the XB-44 programme  -  Earmarked for nuclear bombing (initially referred to as the B-29D).

RB50B

Out of the 45 B-50B produced, 44 were converted to the photo-reconnaissance role under the designation RB-50B. The RB-50B featured four camera stations (supporting a total of 9 cameras), weather reconnaissance instruments, and extra crew members housed inside a capsule installed in the rear bomb bay. The RB-50B was capable of being refuelled by the British-developed hose refuelling system, and could carry a 700-gallon auxiliary fuel tank under each wing.  These aircraft were later further modified, still for reconnaissance duties but these conversions are beyond the scope of this limited summary.

B-50C

An attempt to squeeze the best from the B-29 design with yet more powerful engines (R-4360-51VDT).  No B-54A were manufactured.

B-50D

Final variant.  Could be refueled in flight through the boom system developped by Boeing

 C-97

A military transport based on an enlarged fuselage - see : KC97 Background

KC-97

An aerial refuling tanker iteration of the above - see : KC97 Background

B-377

A luxurious civilian airliner

Tu-4

The Soviet reverse-engineered the B-29 bomber as the Tu-4.  It first flew in 1947 and served till the early 1960s.  Key variants :

Tu-4A: conventional bomber Tu-4A: capable of carrying the early Soviet nuclear bombs
Tu-4K: carrying the KS-1 Komet anti-shipping missile Tu-4R: photo-reconnaissance aircraft

Tu-4?: 10 aircrafts donated to China; re-engined with Kuznetzov

AI-20K turboprop in 1966, the last was retired in 1988

KJ-1A: a Chineese attempt to produce an AEW platform based on

a re-engined Tu-4.  (1967-1971)

Historical

  Role

QTY

Aircraft

Name

1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967
 

-

  BB

2513

B-29

Superfortress

1943 195+                        
 

-

  BB

1119

B-29A

Superfortress

1943 195+                        

UK

  BB

  84

B-29A

Superfortress

1950 1954                        
 

-

  BB

311

B-29B

Superfortress

1945 195+                        
 

-

  BB

60

B-50A

Superfortress

1948 1954                        
 

-

  [PR]

45

RB-50B

Superfortress

1949 1955                        
 

-

  BB

  29

B50C/B54

Ultrafortress

// canx                        
 

-

  BB

222

B-50D

Superfortress

1949 1955                        
 

-

  (...)

xxx

B-50D

Superfortress

1955 1965 > > > > > > > > > 1965    

Historical

  Role

QTY

Aircraft

Name

                       
 

-

  BB

847

Tu-4

Bull

1949 1959 > > > 1959                
 

-

  BB

xxx

Tu-4A

Bull

195+ 1960 > > > > 1960              
 

-

  BB

xxx

Tu-4K

Bull

195+ 1961 > > > > > 1961            
 

-

  [PR]

xxx

Tu-4R

Bull

195+ 1962 > > > > > > 1962          

China

  BB

  12

Tu-4

Bull

1953 1988 > > > > > > > > > > > >

Atlantic Air Combat™

Aircraft

Name

1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967

USA

AF BB

~

BB29H85

Supercastle

1948 1955

USA

AF BB

~

P2B3S90

Supercastle

1945 195+

UK

AF BB

~

P2B3S90

Supercastle

1950 1954

USSR

AF BB

~

TP04B10

Bust

1949 1961 > > > > > 1961

USSR

AF AEW

~

TP04W75

Maze

~ > > > > > >

THE B-29 IN ATLANTIC AIR COMBAT™

The type is represented mainly to please afficionados.  If a few aircraft lingered on a little longer in ancillary duties, it was obsolete and retired from service by the late fifties.  It will be present in AAC™ with the following operators under the following designations :

BB29H85 Supercastle Bomber
ASS
ASW
  a fictional variant mixing a lengthened B-50D with "R4370.51" engines, mimicking the ill-fated R-4360-51VDT.  A higher payload but a MTOW similar to the B-50D.  In AAC™, the type is actually a sequel of the KC097M40.
  combines the conventional bomber role with secondary anti-shipping ahd ASW duties
P2B3S90 Supercastle Bomber
ASS
ASW
  a fictional interpretation of the B-29A, standing for the iconic bomber.  While carrying a USN type designation, thus standing for the real P2B-2S, in bomber mode it will stand for the B-29A used by the RAF
TP04B10 Bust Bomber
ASS
    pretty much the inspiring design with the same longer fuselage as the BB29H85 and a slightly different defensive weapons arrangement.
ASW   combines the conventional bomber role with secondary anti-shipping ahd ASW duties
TP04W75 Maze AEW     a fantasy based on the work carried out in China in the late sixties, but here associated with the standard Soviet variant of the bomber

Designation in Atlantic Air Combat™

With numerical chronology in mind, a designation around "B-29" was favoured against any around "B-50" :

Boeing                 Fåker    
B345-1 B-29 Supefortress             F-345-1 P2B3S90 Supercastle
  B-29A "                  
  B-29B "                  
  B-29C (not built)                  
  B-29D   B345-2 B-50A Supefortress            
  B-29E     B-50B "            
  B-29F     B-50C   B345-3 B-54A (not built)      
  B-29G     B-50D Supefortress            
  B-29H     B-50E         F-345-3 BB29H85 Supercastle
Tupolev                 Tepanev    
Tu-4 (B-4) Bull             Te-4B TP04B10 Bust
Tu-4A "                  
Tu-4D Transport "                  
Tu-4K a/ship "                  
Tu-4R Recon "                  
 KJ-1 AEW -             Te-4P TP04W75 Maze

Fuel Capacity

The B-29 fuel system consisted of connected tanks in the wings, including the wing central box, for an alleged total capacity of 6803 US gal.  Up to four additional 640 US gal fuel tank could fill the bomb bays.  Then Mr Baugher refers to a total of 6878 US gal, and the authors of the 6th Bomber Group page to 6940 US gal....  The value of the below summary is thus very questionable.
B-50 It could still take the additional 640 US gal bomb bay tanks, and both the RB-50B and B-50D could carry a pair of 700 US gal drop tanks under the outer wing pylons (or a pair of 4,000 lb bomb for that matter)
C-97 the transport variant had a somewhat increased fuel capacity, with 700 US gal underwing drop tanks for later variants
KC-97G the 700 US gal drop tanks were replaced by J-47 jet auxiliary engines on the KC-97L - fuel cells on the upper and lower decks
B-377 same basic fuel capacity as the C-97, even if a few of them had addtional outer wing tanks

Aircraft

Total

B-29

Superfortress 1320 1415 1333 1415 1320

6803.US

bay tank 640 640 640 640

9363.US

B-29A

Superfortress 1389 1415 1333 1415 1389

6941.US

2780.nmi

bay tank 640 640 640 640

9501.US

5213.nmi

B-50D

Superfortress 1389 1415 1333 1415 1389

6941.US

4163.nmi

drop tank

bay tank 700 640 640 640 640 700

10901.US

5006.nmi

C-97G

Stratolifter 1770 1520 1210 1520 1770

7790.US

3650.nmi

drop tank

700 700

9190.US

4306.nmi

KC-97G

Deck 492 492 492 492 492 492 492 492 492 3936.US

drop tank

Stratotanker 1770 1520 1210 1520 1770

7790.US

Deck 238 700 238 238 238 238 238 238 238 238 700

1904.US

15030.US

B-377

Stratocruiser 1770 1520 1210 1520 1770

7790.US

4000.nmi

B-377+

Stratocruiser 180 1770 1520 1210 1520 1770 180

8150.US

4185.nmi

Defensive Weapons

Tail Turret : if all sources agree on the number of gun turrets, conflicting information has been collected for the B-50D tail turret with a graphic representation showing a quad gun arrangement, very different from the usual twin .50 cal machine guns and single Colt M2 20mm cannon or triple .50 cal machine guns layout.  As there is only a single gun type per turret in Atlantic Air Combat™, this apparent discrepency will be disregarded, even more so as the 20mm tail gun was soon abandoned in favour of a third .50 cal machine gun, B-29 and B-50 alike.

Lower Forward Turret : it seemed it was stored in a rear facing position in order to clear the nose wheel doors, and was positioned in a forward facing position in order to allow the front bomb bay doors to open.  In AAC, this lead to a purposedly lengthened forward fuselage imagined for the sole purpose to avoid this constraint, and the replacement of the 23mm guns on the TP04B10 with .50cal guns standing for the Berezin BZT.  This said, these forward positioned gun turrets are likely to be fixed, and their content assimilated as forward firing guns.

Gun Types : the B-29/B-50 were equipped with 750 rpm firing M-2/AN .50cal guns, and the Tu-4 was donned with 600 rpm NS-23 cannons.  For the purpose of the game, these guns are traded for 1200 rpm "ANM3" and 800 rpm "NR23" respectively

          In AAC           In AAC           In AAC  

B-29A

 Fwd

4×50cal M2/AN 4×50cal ANM3

Rear

2×50cal M2/AN 2×50cal ANM3

 Tail1

2×50cal M2/AN 3×50cal ANM3

P2B3S

 Fwd

2×50cal M2/AN 2×50cal ANM3

Rear

2×50cal M2/AN 2×50cal ANM3

 Tail2

1×20mm M2

B-50D

 Fwd

4×50cal M2/AN 4×50cal ANM3

Rear

2×50cal M2/AN 2×50cal ANM3

 Tail1

2×50cal M2/AN 3×50cal ANM3

BB29H

 Fwd

2×50cal M2/AN 2×50cal ANM3

Rear

2×50cal M2/AN 2×50cal ANM3

 Tail2

1×20mm M2

Tu-4A

 Fwd

2×23mm NS-23 2×23mm NR23

Rear

2×23mm NS-23 2×23mm NR23

 Tail1

2×23mm NS-23 2×23mm NR23

TP04B

 Fwd

2×23mm NS-23 2×50cal BZUT

Rear

2×23mm NS-23 2×23mm NR23

Weights in general

Atlantic Air Combat™ does not care much about weights as it only slightly affects aircraft behaviour (acceleration, inertia).  Weights are set in order for the game AI to calculate these which in effect makes different aircrafts behave differently.  For instance the notion is used to determine the take-off run, or actually verify that the preset values are reasonably consistent with reference data.  Then, weights don't impact range nor speed.

This said, however numerous the cheats, we at AAC™ nevertheless try our best to keep them within reason or plausible if you prefer.

The BB29H85 is thus loosely based on the Boeing B-50D without respecting the background data as internal and/or external loads may be different while the TP04B10 refers more closely to the B-29A/TU64.

Based on the data collected and assembled in the main table below, this is sor sort of "weight check list".  And please remember, it's only a fantasy...

B-50D       BB29H85 (Fantasy)    
Weight - empty   80 609 lb Weight - empty   80 609 lb
Crew 11   2 200 lb Crew 11   2 200 lb
 Pilot 200 lb/@ 200 lb -  Pilot 200 lb/@ 200 lb -
 Co-Pilot 200 lb/@ 200 lb -  Co-Pilot 200 lb/@ 200 lb -
 Bombardier 200 lb/@ 200 lb -  Bombardier 200 lb/@ 200 lb -
 Navigator 200 lb/@ 200 lb -  Navigator 200 lb/@ 200 lb -
 Engineer 200 lb/@ 200 lb -  Engineer 200 lb/@ 200 lb -
 Radar 200 lb/@ 200 lb -  Radar 200 lb/@ 200 lb -
 Radio 200 lb/@ 200 lb -  Radio 200 lb/@ 200 lb -
 Gunners 200 lb/@×4 800 lb -  Gunners 200 lb/@×4 800 lb -
- - - - - - - -
Fuel - 7790.US 6 lb/US gal - 46 740 lb Fuel - 7790.US 6 lb/US gal - 46 740 lb
Guns - Ammunition - 1 947 lb Guns - Ammunition - 1 872 lb
 Top Fwd 500 rpg×4 720 lb -  Top Fwd 500 rpg×4 720 lb -
 Top Rear 500 rpg×2 288 lb -  Top Rear 500 rpg×2 288 lb -
 Belly Fwd 500 rpg×2 288 lb -  Belly Fwd 500 rpg×2 288 lb -
 Belly Rear 500 rpg×2 288 lb -  Belly Rear 500 rpg×2 288 lb -
 Tail .50cal 500 rpg×2 288 lb -  Tail .50cal 500 rpg×2 288 lb -
 Tail 20mm 100 rpg×1 75 lb -  Tail .50cal 500 rpg×1 144.lb -
- - - - - - - - - -
Load Bay - - 20 000 lb Load Bay - - 24 000 lb
Load Pylons 700.US×2 5131 lb 10 262 lb Load Pylons 700.US×2 5131 lb 10 262 lb
Load HVAR - - - Load HVAR - - -
Weight Total - - 166 889 lb Weight Total - - 165 683 lb
Weight MTOW - - 173 000 lb Weight MTOW - - 173 000 lb

B-29/B-50 Internal Bomb Carrying Capacity

Bomb

Nominal

Notes

-

Qty Total

Bomb

Nominal

Notes

-

Qty

Total

M30

108.lb

general purpose

-

80

8640.lb

Mk33

1100.lb

demolition

-

12

13200.lb

M-47A2

100.lb

incendiary

-

80

8000.lb

MK-1º

1600.lb

armor piercing

-

12

19200.lb

M-38

100.lb

practice

-

 

.lb

Mk10

1850.lb

sea mine

-

8

14800.lb

M-47

100.lb

smoke

-

 

.lb

M-66

2000.lb

general purpose

-

8

16000.lb

M-57

250.lb

general purpose

-

56

14000.lb

Mk24

2000.lb

sea mine

-

8

16000.lb

M-31

300.lb

demolition

-

56

16800.lb

M-56

4000.lb

demolition

-

4

16000.lb

M-64ª

500.lb

general purpose

-

40

20000.lb

M-66

2000.lb

general purpose

-

8

16000.lb

M-19

500.lb

incendiary

-

40

20000.lb

?....

11780.lb

demolition

Pumpkin

1

11780.lb

M-58º

500.lb

semi-a.piercing

-

40

20000.lb

Mk-1

10300.lb

nuclear

Little Boy

1

8900.lb

M-62º

600.lb

armor piercing

-

 

.lb

Mk-3

10300.lb

nuclear

Fat Man

1

10300.lb

M-32

600.lb

demolition

-

32

19200.lb

Mk-4

10850.lb

nuclear

-

1

10850.lb

Mk29

650.lb

depth charge

-

 

.lb

Mk-5

3100.lb

nuclear

-

1

6200.lb

Mk13

1050.lb

sea mine

-

12

12600.lb

Mk-6

8000.lb

nuclear

-

1

8000.lb

Mk26

1100.lb

sea mine

-

12

13200.lb

T-10

12000.lb

(oversized)

Tall Boy

1

12000.lb

Mk36

1130.lb

sea mine

-

12

13560.lb

VB13

12000.lb

(oversised)

Tarzon

1

12000.lb

M-65

1000.lb

general purpose

-

12

12000.lb

Fuel

4480.lb

640 US gal

640 lbs empty

4

17920.lb

ª

AAC™ "standard"

º

not in AAC™

¹

-

²

-

³

-

M00

general purpose

M00

incendiary

M00

sea mines

1000 lb bomb in a 1000lb/2000lb mixed load

M00

armor piercing

M00

smoke bomb

M00

depth charge

overload position

M00

semi-armor piercing

M00

demolition

M00

nuclear bomb

standard position

B-29/B-50 External Bomb Carrying Capacity

Bomb

Nominal

Outer Inner B-29A  UNDERWING   PYLONS Inner Outer [T]

Total

M13

1000 lb

-

T-10 Tall Boy and/or VB13 Tarzon bombs were dropped during the Korean war

It is assumed lighter loads could also be carried (never did in practice)

- 2

2000 lb

M65

1000 lb

- - 2

2000 lb

M66

2000 lb

- - 2

4000 lb

M56

4000 lb

- - 2

8000 lb

T10/VB13

12000 lb

- - 2

24000 lb

Bomb

Nominal

Outer Inner B-50D  UNDERWING   PYLONS Inner Outer [T]

Total

M13

1000 lb

-

Located outboard the engines, the underwing pylons were tailored for 700 USgal drop tanks but coud take a bomb up to a 4,000 lb AN/M-56

- 2

2000 lb

M65

1000 lb

- - 2

2000 lb

M66

2000 lb

- - 2

4000 lb

M56

4000 lb

- - 2

8000 lb

B-29/B-50/Tu-4  vs  BB29H85/TP04B10  BOMB LOADS

The B-29 and B-50 were equipped with two bomb bays, the exact dimensions of which were not retrieved nor the internal layout applying to small or medium bombs.  The FD scale graphics below are thus based on general information rather than dimensional data.  A pressurized tunnel was traversing the aircraft above the bomb bays, allowing in-flight transfer of crew between the forward and rear compartments.  The aft bay seemed to have been somewhat shorter in length and smaller in height.

For AAC™ purposes, a common length of 13'03" is adopted and the internal layouts are the fruit of both research and imagination.  As usual, reasonably verified information is shown in blue, guesstimates in black, and fanstasy/cheats appear in dark red.  As the design is serving with three different operators, some loadouts/weapons might be specific to an operator.

Bombs

AN/M-64

40× verified

number

AAC™

Bombs

Mk064

48× cheated

number

Addtional Bomb Bay Fuel Tanks
Both the B-29 and B-50 could be take up to 4 bomb bay fuel tanks of 640 US gallons each, usually limited to two carried in the rear bay, associated with a bomb load up front.  In the absence of factual data, the loaded weight is arrived at as follows : 640×6 lb/US gal + 640 lb = 4480 lbs with 640 llb for an empty tank being guesstimated using the rule of the thumb.

4× 640.US Ferry
4× 4480.lb 17920.lb

AAC™

Ferry 2560.US
4× 4480.lb 17920.lb

2× 640.US +M32
18× 600.lb 10800.lb

AAC™

Fuel +Mk032
18× 600.lb 19760.lb

100 lb - 250 lb Bombs

Bombs M30
80× 100.lb 8000.lb

AAC™

  Mk030
80× 100.lb 8000.lb

Bombs 50FAB44
80× 60.kg 10560.lb

AAC™

  44B05
80× 132lb 10560.lb

Bombs M57
56× 250.lb 14000.lb

AAC™

  Mk057
56× 250.lb 14000.lb

Bombs 100FAB44
56× 100.kg 12320.lb

AAC™

  44B10
56× 220.lb 12320.lb

500 lb Bombs

Bombs M64
40× 500.lb 20000.lb

AAC™

  Mk064
40× 500.lb 20000.lb

Bombs  
- 250.kg -

AAC™

  44B25
40× 550.lb 22000.lb

750 lb Bombs
Neither the B-29 nor the B-50 were ever scheduled to carry M117 bombs - it is imagined for the purposes of the game.  The closest Soviet equivalent is the streamlined 272 kg 250FAB62.

Bombs M117
× 750.lb -

AAC™

  Mk117
22× 750.lb 16500.lb

Bombs 250FAB62
× 272.kg -

AAC™

  62B27
22× 600.lb 13200.lb

1000 lb Bombs
In terms of occupied volume, it seems possible to add a third layer, increasing the number of 1000 lb bombs to 24.  As the maximum loadout of the BB29H85 is raised to 24,000 lb for game purposes, it might be adopted.

Bombs M65
16× 1000.lb 16000.lb

AAC™

  Mk065
16× 1000.lb 16000.lb

Bombs  
- 500.kg -

AAC™

  44B50
16× 1100.lb 17600.lb

2000 lb  Bombs & Sea Mines
The B-29 dropped mines during the war but of unknown type.  General information refer to the 1,000 lb Mk26 and Mk36, and to the 2,000 lb Mk24.  The contemporary Mk10-9 shown below was an initial assumption before reference to the above mentioned types were found - it is maintained.  Soviet mines of the time are a mystery, and the "SMD99" is thus a fantasy.

2000 lb Guided Bombs
The AAC™ VB040 and 44V90 are mimicking the VB-4 Razon of Korean war vintage

Bombs M66
8× 2000.lb 16000.lb

AAC™

VB040 Mk066
2000.lb 16000.lb

Bombs  
- 900.kg -

AAC™

44V90 44B90
2000.lb 16000.lb

Mines Mk10-9
1850.lb 14800.lb

AAC™

  SM109
1850.lb 14800.lb

Mines  
- 900.kg -

AAC™

  SMD99
2000.lb 16000.lb

3000 lb Bombs
Neither the B-29 nor the B-50 were ever scheduled to carry M118 bombs - it is imagined for the purposes of the game, and one of the reasons the maximum bomb load of the "BB29H85" has been pushed up to 24,000 lbs.  The closest Soviet equivalent was a 1.5 ton demolition bomb, known in AAC™ as 54K15.

Bombs M118
- 3000.lb -

AAC™

  Mk118
8× 3000.lb 24000.lb

Bombs -
- 1500.kg -

AAC™

1550.kg 54K15
3400.lb 13600.lb

4000 lb/4750 lb Bombs  &  4000 lb Betty  Depth Charges
The M56 demolition bomb is often referred to as a "4,000 lb" bomb, while some source mention an actual weight of 4,750 lbs (with 3721 lb of explosive filling), and this highter mass is retained for AAC™ purposes.

The Mk90 Betty  was a 1250 lb depth charge tipped with a 2kt nuclear warhead.  In AAC™, the shell is used to imagine a 4,000 lb conventional depth charge carrying 2,860 lb of explosive which may also be used as a conventional bomb - see also ASW Weapons further below

Bombs M56
4× 4000.lb 16000.lb

AAC™

  Mk056
4750.lb 19000.lb

Depth   Mk90
- 1250.lb -

AAC™

  DC090
4× 4000.lb 16000.lb

British 4000 lb Demolition Bombs
Typical of the British raids over Germany during WWII were the "high capacity" demolition bombs.  It is imagined that the RAF worked it out when they used the 80+ B-29A on load during the early fifties.

Bombs HC-4000
3930.lb 15720.lb

AAC™

  HC040
3930.lb 15720.lb

6750 lb Bombs
The Soviet Union had its own range of very heavy demolition bombs, among them a 3 tons bomb

Bombs -
- 3070.kg -

AAC™

  54K30
6750.lb 13500.lb

British 8000 lb Demolition Bombs
Typical of the British raids over Germany during WWII were the "high capacity" demolition bombs.  It is imagined that the RAF worked it out when they used the 80+ B-29A on load during the early fifties.

Bombs HC-8000
7860.lb 15720.lb

AAC™

  HC080
7860.lb 15720.lb

12000 lb Bomb - Pumpkin
The B-29 is sadly remembered for having dropped fission bombs on Hiroshima (Mk1) and Nagasaki (Mk3).  The Mk3 was later replaced by bombs of decreasing weight and increasing yield but of similar shape and size.

A lesser known weapon was the Pumpkin  bomb, a Mk3 Fat Man shell filled with 6,300 lb of explosive.  During the war, 49 of these were dropped from an altitude of 30,000 ft against Japanese factories (509th CG combat missions of July 20, 23, 26 and 29, and August 14 1945).  A single bomb was carried in the forward bay.

In AAC™ this bomb is known as the 13T13 and the number of any of these bombs is increased to two.  In the USSR, the closest equivalent was a 5 tons demolition bomb.

Mk3 Mk4
Mk5 Mk6

Bomb   Mk3
1× 10300.lb 10300.lb

AAC™

  13T13
2× 11780.lb 23560.lb

Bomb -
- 5250.kg -

AAC™

  54K50
11550.lb 23100.lb

12000 lb Bomb - Pumpkinsky
In 1949, the USSR detonated their first atomic bomb, the RDS-1, and the type entered Soviet Air Force service in 1951.  To keep things simple, the RDS-1 was roughly equivalent in size, weight and yield and general appearance to the US Mk3.  The type was later replaced by the RDS-3/4/5, all part of the Tu-4A arment, although details are lacking on these.  For AAC™ purposes, a 120kt RDS-2 has been imagined.   Presumably a single bomb was carried.

While the Soviet Air Force already had several very heavy bombs available, it is imagined that not only the Fat Man  was copied, but also the Pumpkin  bomb.  Like the BB29H85, the TP04B10 may carry a pair of either.

RDS-1 RDS-1
RDS-2 RDS-2

Bomb   RDS1
1× 5000.kg 11003.lb

AAC™

  51K54
2× 5400.kg 23800.lb

British Nuclear Weapons
As both the US and Soviet nuclear weapons have been mentioned, it would be unfair not to mention the British one.  It is assumed the MC-Mk2 was already available and fitted the loaned B-29As.

Bombs   MCMk1
1750.lb 7000.lb

AAC™

Raft.10  LR-10
1750.lb 7000.lb

Liferafts - 10 or 15 persons
Either in the real world or in Atlantic Air Combat™, any aircraft with a bomb/weapons bay is able to carry liferafts and AAC's Supercastle/Bust  will be no exception.  Both the LR-10 (10 persons) and the LR-15 (15 persons) are examined but only one type will be retained for game purposes.  With a "life rescuing" capacity of 440 persons for the LR-10 against 240 persons for the LR-15, the former should be favoured.

Liferaft ##
44× 10  440 

AAC™

Raft.10  LR-10
44× 100.lb 4400.lb

Liferaft ##
24× 15  360 

AAC™

Raft.15  LR-15
24× 150.lb 3600.lb

ASW Weapons
With the exception of the two USN P2B-2S (BuAe No 84030 and 84031), neither the Boeing B-29/B-50 nor the Tupolev Tu-4 was ever used to track submarines.  But as both the Boeing B-17 and Consolidated B-24 were, it is imagined the BB29H85, P2B3S90 and TP04B10 are all fully equipped for ASW purposes, including internally carried 16 sonobuoys.

Depth Mk17
- Torpedo Mk34
16× 40.lb Sonobuoy
24× 340.lb DC017
2× 1150.lb ASW34

Depth Mk11
- Torpedo Mk30
16× 40.lb Sonobuoy
24× 320.lb DC011
2× 650.lb ASW30

Depth PLAB250
- Torpedo TT-4
16× 40.lb Sonobuoy
24× 550.lb DCB25
2× 840.lb ASWT4

EXTERNAL LOADS

Several B-29As were modified to carry a pair of 12,000 lb Tallboy  bombs under the wings (close to the fuselage), and Boeing even tested the carrying of a pair of 22,000 lb Grand Slam  bombs.  At least a single airframe was modified to carry either a Grand Slam  or even a 44,000 lb Cloud Maker  in a semi-recessed manner under the fuselage, althoug other sources mention a single 13,000 Tarzon bomb carried that way .  Operationally, a few of these (a radio guided variant of the Tallboy) were dropped during the Korean war.  The B-50D was carrying a pair of 700 US gallons drop tanks, outboard of the engines.  These could allegedly give way to a pair of "4,000 lb" bombs, even if that would impact negatively on range (the motive for the presence of these drop tanks in the first place).  Resting on the above, the BB29H85 might do the same, either inboard and/or outboard, disregarding the semi-recessed carrying under the fuselage.

A variant of the Tupolev Tu-4 Bull  had pylons between the engines tailored for the carrying of a pair of 6,600 lb KS-1 Komet, a nuclear tipped stand-off anti-shipping missile ressembling a scaled down MiG-15.  In AAC™, the Komet is represented by a similarly looking missile loaded wth a 600 kg (1322 lb) conventional warhead.  By extension, AAC's TP04B10 may carry a pair of them, as well as other loads, up to the 6,750 lb "54K30" demolition bomb.

Lighter Bombs
Neither the B-50 nor the Tu-4 are documented to have externally carried any other weapons than those mentioned above, but in AAC™ lighter bombs might be considered, as well as mines, depth charges, etc.

Anti-Shipping Torpedoes
The B-29/B-50 never carried torpedoes, nor its Soviet cousin.  Then, in AAC™, anti-shipping torpedoes are scheduled for two purposes :
attack large shipping convoys, a rehearsal of WWII events
special purpose, the details of which are hidden from the public at this time

With the BB29H85/TP04B10 able to fly slow, players might be tempted to try and manoeuvre such a large aircraft to deliver these torpedoes, either in the open seas or ... in other circumstances.  The weapons at stake are :
ASSTA : a SU aircraft launched anti-shipping torpedo, mimicking the 2,100 lb 4556NT
ASS13 : a US aircraft launched anti-shipping torpedo, mimicking the WWII vintage Mk13
AUM21B : a 3,800 lb jet propelled torpedo carrying anti-shipping missile, mimicking the equivalent AUM-N-2 Petrel

HVAR Rockets
If the B-29 never carried rockets, several "heavy" aircrafts did, especially in the maritime patrol role.  So HVAR rockets are another fantasy weapon considered for the Supercastle/Bust  in the context of anti-shipping and anti-submarine warfare.

SPECIFICATIONS SUMMARY
      TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
      Bust Bull Superfortress Superfortress Superfortress Superfortress Supercastle
9           4 4 7 4 7 4 7 4 7 4 7 4 7 4 7
Length - - 101'02" 99'00" 99'00" 99'00" 99'00" 99'00" 101'02"
Span - - 141'03" 141'03" 141'03" 141'03" 141'03" 141'03" 141'03"
Height - - 27'09" 27'09" 27'09" 32'08" 32'08" 32'08" 32'08"
Wing area W×H - 1720.ft² 1741.ft² 1736.ft² 1720.ft² 1720.ft² 1720.ft² 1720.ft²
Fuselage Ø W×H - 9'06" 9'06" 9'06" 9'06" 9'06" 9'06" 9'06"
ENGINES TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
Engine-1:ID Piston × 4 SH.SH73T ASh-73TK R3350.57 R4360.35 R4360.35 R4360.35 R4370.51
Engine-1:Pwr1a Military hp 2400.hp 2400.hp 2200.hp 2800.hp 2800.hp 2800.hp 3500.hp
Engine-1:Pwr1b Military lbf // // // // // // 400.lbf
Engine-1:Pwr2a extra hp // // 2300.hp 3500.hp 3500.hp 3500.hp 4300.hp
Engine-1:Pwr2b extra lbf // // // // // // 491.lbf
Engine-1:Prop Diam - 16'07" 16'07" 16'07" 16'07" 16'07" 16'07" 16'07"
AVIONICS TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
Avionics: Radar ID BPU04 ?... AN/APQ-13 AN/APQ-24 AN/APQ-24 AN/APQ-24 ABQ24
Avionics: Warn ID TPU03 ?... AN/APG-15 AN/APG-15 AN/APG-15 AN/APG-15 ATG03
FEATURES TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
Engine-1: Reverse - no no no YES YES YES YES
In-flight refuel Boom - no no no no no YES YES
CREW TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
Crew - Q 11 11 11 11 13 11 11
Pilot Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Co-Pilot Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Bombardier Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Navigator Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Engineer Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Radar Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Radio Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Gunner - Ctrl Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Gunner - Left Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Gunner - Right Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Gunner - Tail Egress Q 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail 1 Bail
Photo - 1 Egress Q - // - // - // - // 1 Bail - // - //
Photo - 2 Egress Q - // - // - // - // 1 Bail - // - //
INTERNAL WEAPONS TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
Recce.Pack Inbuilt Q - // - // - // - // 5 cams - // - //
Gun.T.:Top Fwd Q 23mm 23mm 4× .50cal 4× .50cal 4× .50cal 4× .50cal 4× .50cal
Gun.T.:Top Aft Q 23mm 23mm .50cal .50cal .50cal .50cal .50cal
Gun.T.:Belly Fwd Q 23mm 23mm .50cal .50cal .50cal .50cal .50cal
Gun.T.:Belly Aft Q 23mm 23mm .50cal .50cal .50cal .50cal .50cal
Gun.T.:Tail Gun-1 Q 23mm 23mm .50cal .50cal .50cal 3× .50cal 3× .50cal
Gun.T.:Tail Gun-2 Q - // - // 20mm 20mm 20mm - // - //
FUEL TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
Fuel:Internal Standard US 6803.US 6803.US 6941.US 6941.US 6941.US 6941.US 6941.US
Fuel:Extra Pylon US 2×700.US 2×Volume ?... - - 2×700.US 2×700.US 2×700.US
Fuel:Total RED. SUP US 120% 8203.US 100% 6803.US 100% 6941.US 100% 6941.US 120% 8341.US 120% 8341.US 120% 8341.US
WEIGHTS & LOADS TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
Weight:Empty - - 73900 lb 81240 lb 71360 lb 81050 lb 81050 lb 80609 lb 80609 lb
Drop tank 700 lb/@ - 2 1400.lb 2 1400.lb - // - // 2 1400.lb 2 1400.lb 2 1400.lb
Crew: 200 lb/@ - 11 2200.lb 11 2200.lb 11 2200.lb 11 2200.lb 13 2600.lb 8 1600.lb 11 2200.lb
Gun.T.:Top Fwd rpg 400 1120.lb 400 1120.lb 500 576.lb 500 576.lb 500 576.lb 500 576.lb 500 576.lb
Gun.T.:Top Aft rpg 400 1120.lb 400 1120.lb 500 288.lb 500 288.lb 500 288.lb 500 288.lb 500 288.lb
Gun.T.:Belly Fwd rpg 400 1120.lb 400 1120.lb 500 288.lb 500 288.lb 500 288.lb 500 288.lb 500 288.lb
Gun.T.:Belly Aft rpg 400 1120.lb 400 1120.lb 500 288.lb 500 288.lb 500 288.lb 500 288.lb 500 288.lb
Gun.T.:Tail Gun-1 rpg 400 1120.lb 400 1120.lb 500 432.lb 500 288.lb 500 288.lb 500 432.lb 500 432.lb
Gun.T.:Tail Gun-2 rpg - // - // - // 100 75.lb 100 75.lb - // - //
Sub-Total-0 Basic - 81700 lb 89040 lb 75332 lb 85953 lb 85453 lb 84081 lb 84681 lb
Sub-Total-1 Fuel:AvGas US 85% 34698.lb 100% 40818.lb 100% 41646.lb 100% 41646.lb 100% 41646.lb 100% 41646.lb 100% 41646.lb
INTERNAL LOAD OPTIONS TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
Bombs: M-30 100 lb - - - - - 80 8000.lb 80 8000.lb - - 80 8000.lb 80 8000.lb
Bombs: M-57 250 lb - - - - - 56 14000.lb 56 14000.lb - - 56 14000.lb 56 14000.lb
Bombs: M-31 300 lb - - - - - 56 16800.lb 56 16800.lb - - 56 16800.lb - -
Bombs: M-64 500 lb - - - - - 40 20000.lb 40 20000.lb - - 40 20000.lb 48 24000.lb
Bombs: M-65 1000 lb - - - - - 16 16000.lb 16 16000.lb - - 16 16000.lb 24 24000.lb
Bombs: Mk-1 1600 lb - - - - - 12 19200.lb 12 19200.lb - - 12 19200.lb 12 19200.lb
Bombs: M-66 2000 lb - - - - - 8 16000.lb 8 16000.lb - - 8 16000.lb 8 16000.lb
Bombs: 44B90 2000 lb - 8 16000.lb 6 13200.lb - - - - - - - - - -
Bombs: M-56 4750 lb - - - - - 4 16000.lb 4 16000.lb - - 4 16000.lb 4 16000.lb
Bombs: Mk3 10300 lb - - - - 1 10300.lb 1 10300.lb - - 1 10300.lb 2 20600.lb
Bombs: RDS-1 11000 lb 2 22000.lb 1 11000 lb - - - - - - - - - -
Bombs: 54K50 11550 lb - 2 23100.lb - - - - - - - - - - - -
Bombs: Pumkin 11780 lb - - - - - 1 11780.lb 1 11780.lb - - 1 11780.lb 2 23560.lb
Bombs: 51K54 11900 lb - 2 23800.lb - - - - - - - - - - - -
Mines : Mk10 1850 lb - - - - - 8 14800.lb 8 14800.lb - - 8 14800.lb 8 14800.lb
Sub-Total-2 Internal - 23800.lb 13200.lb 20000.lb 20000.lb 0.lb 20000.lb 24000.lb
EXTERNAL LOADS TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
HVAR: R1 R3 R5 R7 Port 4 200.lb - - - - - - - - - - 4 560.lb
Pylons:W5:Wing Outer Port - - - - - - - - - 4900.lb - 4900.lb - 4900.lb
Pylons:W3:Wing Central Port - 6750.lb - 6600.lb - - - - - - - - - -
Pylons:W1:Wing Inner Port - - - - - 12000 lb - - - - - - - 12000 lb
Pylons:W2:Wing Inner Stb - - - - - 12000 lb - - - - - - - 12000 lb
Pylons:W4:Wing Central Stb - 6750.lb - 6600.lb - - - - - - - - - -
Pylons:62:Wing Outer Stb - - - - - - - - - 4900.lb - 4900.lb - 4900.lb
HVAR: R2 R4 R6 R8 Stb 4 200.lb - - - - - - - - - - 4 560.lb
Sub-Total-3a External Fuel // // // // 9800.lb 9800.lb 9800.lb
Sub-Total-3b External Max 13500.lb 13200.lb 24000.lb // 9800.lb 9800.lb 33800.lb
Sub-Total-3c External HVAR 400.lb // // // // // 1120.lb
EXTERNAL LOAD OPTIONS TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
Bombs: M-56 4750 lb - - - - - - - - - - - 2 9500.lb 4 19000.lb
Bombs: 54K30 6750 lb - 2 13500.lb - - - - - - - - - - - -
Bombs: T-10 12000 lb - - - - - 2 24000.lb - - - - - - 2 24000.lb
Missl. : KS-1 6600 lb - 2 13200.lb 2 13200.lb - - - - - - - - - -
Fuel   : 700.US 4900 lb - 2 9800.lb 2 9800.lb - - - - 2 9800.lb 2 9800.lb 2 9800.lb
WEIGHT & LOADS SUMS TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
INTERNAL ONLY Basic - 81700 lb 89040 lb 75332 lb 85953 lb 85453 lb 84081 lb 84681 lb
Sub-Total-1 Fuel:AvGas US 85% 34698.lb 100% 40818.lb 100% 41646.lb 100% 41646.lb 100% 41646.lb 100% 41646.lb 100% 41646.lb
Sub-Total-2 Internal   23800.LB 13200.lb 20000.lb 20000.lb 0.lb 20000.lb 24000.lb
Sub-Total-3a External Fuel - - - - 9800.lb 9800.lb 9800.lb
Weight:Total - - 140198.lb 143058.lb 136978.lb 147599.lb 136899.lb 155527.lb 160127.lb
Weight:MTOW - - 140200 lb 140200 lb 135000.lb 168700.lb 170400 lb 173000 lb 173000 lb
WEIGHTS & LOADS SUMS TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
EXTERNAL MAX Basic - 81700 lb 89040 lb 75332 lb 85953 lb 85453 lb 84081 lb 84681 lb
Fuel:Int.AvGas US×6.00 US 100% 40818.lb 93% 37961.lb 83% 33879.lb // // // // // // 100% 41646.lb
Sub-Total-3b External Max 13500.lb 13200.lb 24000.lb // // // 33800.lb
Weight:Total - - 136018.lb 140201.lb 133211.lb // // // 160127.lb
Weight:MTOW - - 140200 lb 140200 lb 133500.lb 168700.lb 170400 lb 173000 lb 173000 lb
PERFORMANCES TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85
Speed: Rotation F35×1.1 knot 100.kn - - - - - 100.kn
Speed: Takeoff F35×1.2 knot 115.kn - - - - - 115.kn
Speed: Max   knot 300.kn 301.kn 310.kn 340.kn 340.kn 343.kn 375.kn
Speed: Cruise   knot 190.kn - 191.kn 204.kn 204.kn 212.kn 210.kn
Speed: Appr. F35×1.4 knot 145.kn - - - - - 160.kn
Speed: Stall F00 knot 90.kn - 91.kn 118.kn 118.kn 120.kn 120.kn
Speed: Stall F15 knot 85.kn - - - - - 130.kn
Speed: Land F35 knot 80.kn - - - - - 105.kn
Speed: Stall F35 knot 75.kn - - - - - 80.kn
Climb.rate ft/min   910.ft/min 910.ft/min 900.ft/min 2225.ft/min 2225.ft/min 2225.ft/min 2285.ft/min
Ceiling - ft 37000.ft 36700.ft 33600.ft 37000.ft 37000.ft 36650.ft 43000.ft
TakeOff Run - ft 6420.ft - - 5940.ft 5940.ft 6420.ft 6420.ft
Landing Run Brakes ft 3000.ft - - - - - 3000.ft
Landing Run Reverse ft // - - - - - 1500.ft
Range:Ferry Fuel Extra nmi // - 5213.nmi - - 5006.nmi //
Range:    ,   0lb Payload nmi - 4865.nmi 4544.nmi 4544.nmi -
Range:  5,000lb Payload nmi - 3475.nmi - - -
Range:  6,000lb Payload nmi 3355.nmi 3250.nmi - - -
Range:10,000lb Payload nmi 85%=2852.nmi - 2780.nmi 3810.nmi 3810.nmi 4163.nmi 4163.nmi
Range:20,000lb Payload nmi - 2667.nmi - - -
Range:25,000lb Payload nmi - 2551.nmi - - -
      TP04B10 Tu-4 B-29A B-50A RB-50B B-50D BB29H85

The B-29 Range
Most of the range information above comes from articles published by Joe Baugher, with one from the 6th Bomber Group page.  According to the latter, a range of 2667 nautical miles was achievable with a 20,000 lb payload.  Some of the data provided differ from the ones used on this page (empty weight), and while reference is made to a reduced amount of ammunitions for the 13 guns, the take-off weight arrived at for the  hypothetical Mission to Tokyo is way above the alleged 133,500 lb MTOW generally published for the B-29/B-29A.   Not to mean it's incorrect, but one has to assume the USAAF then had extra long runways at Tinian...

Anyway, the 2667.nmi mentioned for a 20,000 lb payload, associated with Mr Baugher's and other details, gives the following guesses:

B-29  RANGE PAYLOAD : Empty bays 10×500 lb 20×500 lb Ferry Flight 20×500 lb+Fuel 40×500 lb 2×12000 lb
Weight:basic Empty   78,800.lb 78,800.lb 78,800.lb 78,800.lb 78,800.lb 78,800.lb 78,800.lb
Weight:ammos 100rpg 13 429.lb 429.lb 429.lb 429.lb 429.lb 429.lb 429.lb
Weight:crew 200lb/@ 11 2200.lb 2200.lb 2200.lb 2200.lb 2200.lb 2200.lb 2200.lb
Weight:bay tanks Empty 640 - // - // - // ×4 2560.lb ×2 1280.lb - // - //
Weight:fuel std 6941.US 6lb 41646.lb 41646.lb 41646.lb 41646.lb 41646.lb 41646.lb 41646.lb
Weight:fuel 640.US 6lb - // - // - // ×4 15360.lb ×2 7680.lb - // - //
Payload     // 5000.lb 10000.lb // 10000.lb 20000.lb 24000.lb
Weight: Take-off   123075.lb 128075.lb 133075.lb 140995.lb 142035.lb 143075.lb 147075.lb
Range @191 kn   4865.nmi 3475.nmi 2780.nmi 5213.nmi 3272.nmi 2667.nmi 2551.nmi
Flight time @191 kn h 25.47 18.19 14.55 27.29 17.13 13.96 13.88
Fuel:volume Total US 6941.US 6941.US 6941.US 9501.USgal 8221.USgal 6941.US 6941.US
Fuel:consumption USgal/h   273 382 477 348 480 497 500

Range In Atlantic Air Combat™

Rule-0 : a reference range on internal fuel is adopted, usually referring to the carrying of an average payload at cruise speed.  In AAC™, range is not affected neither by payload nor drag nor altitude.  It may however be affected by the amount of fuel carried, either by the addition of drop or weapons bay tanks or by a reduced amount of internal fuel compensating for extra-heavy payload.  It will be affected by the actual power setting used by the player.  The reference range is thus an indicative AAC™ value only.

Rule-1 : The more fuel the more range, proportionally.  If an aircraft goes 1150 nmi with 380 USgal of fuel, it will go 2300 nmi with 760 USgal or if 3 × 400 USgal drop tanks were added : 380+1200=1580 US gal ÷ 380 = 4.158 × 1150 nmi = 4781.58 ~ 4780 nmi
Comment-1 : this is not intended to match reality and is usually applied to fuel volume/mass variations.
Comment-2 : has the advantage to give an aircraft's SFC or ASFC (aircraft specificic fuel consumption) - an AAC™ fantasy approach

Rule-2 : The more fuel the more range, diferentially.  Example for a 1150 nmi range aircraft on 380 USgal to which 3 × 400 USgal are a added : 3 × 400.USgal = 1200 × 0.66 = 792 +380 = 1172 ÷ 380 = 3.084 × 1150 nmi = 3546.84 ~ 3550 nmi.
Comment : this still doesn't match reality but may mimize unrealistic results

When applied to the above background data, Rule-1 gives the following result for the various AAC™ B-29/B-50/Tu-4 based designs :

RANGE Historic   TP04B10 Tu-4   B-29A P2B3S90   B-50A   B-50D BB29H85
    Fuel 6803.US Fuel 6803.US Fuel 6941.US Fuel 6941.US Fuel 6941.US Fuel 6941.US Fuel 6941.US
Range:Ferry Extra Fuel nmi - - 120% - 137% 5213.nmi - - 120% - 120% 5006.nmi - -
Range:    ,   0lb Payload nmi 100% 100% - 100% 4865.nmi 100% 100% 4544.nmi 100% - 100%
Range:  5,000lb Payload nmi 100% 100% - 100% 3475.nmi 100% 100% - 100% - 100%
Range:  6,000lb Payload nmi 100% 3355.nmi 100% 3355.nmi 100% 3250.nmi 100% 100% - 100% - 100%
Range:10,000lb Payload nmi 100% 100% - 100% 2780.nmi 100% 2780.nmi 100% 3810.nmi 100% 4163.nmi 100% 4163.nmi
Range:20,000lb Payload nmi 100% 100% - 100% 2667.nmi 100% 100% - 100% - 100%
Range:24,000lb Payload nmi 100% 100% - 100% 2651.nmi 100% 100% - 100% - 100%
RANGE AAC™   TP04B10 Tu-4   B-29A P2B3S90   B-50A   B-50D BB29H85
US : bay tanks US : drop tanks Fuel 6941.US Fuel 6803.US Fuel 6941.US Fuel 6941.US Fuel 6941.US Fuel 6941.US Fuel 6941.US
Range:Fuel load 6941.US nmi 100% 3355.nmi 100% 3355.nmi 100% 2780.nmi 100% 2780.nmi 100% 3810.nmi 100% 4163.nmi 100% 4163.nmi
Range:2×640US +1280.US nmi 118% 3959.nmi 118% - 118% - 118% 3280.nmi 118% 4912.nmi 118% - 118% 4912.nmi
Range:2×700US +1400.US nmi 120% 4026.nmi 120% - 120% - 120% 3336.nmi 120% 4996.nmi 120% - 120% 4996.nmi
Range:4×640US +2560.US nmi 137% 4596.nmi 137% - 137% - 137% 3809.nmi 137% 5703.nmi 137% - 137% 5703.nmi
Range:2US+2US +2680.US nmi 139% 4663.nmi 139% - 139% - 139% 3864.nmi 139% 5787.nmi 139% - 139% 5787.nmi
Range:2US+4US +3960.US nmi 157% 5267.nmi 157% - 157% - 157% 4365.nmi 157% 6536.nmi 157% - 157% 6536.nmi
 
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