FAB-50 (50 kg)

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Description

The FAB-50 (50 kg) is a 50 kg Soviet general purpose high explosive bomb. FAB is an acronym for fugasnaya aviatsionnaya bomba (фугасная авиационная бомба) or high explosive bomb. FAB bombs are generally followed by the numbers representing the bomb’s weight in kilograms. Russian iron bombs typically utilise circular ring airfoils to stabilise the bombs during freefall differing from the fins rather than box fins utilised on western type general purpose bombs.

FAB bombs typically functioned with a single nose fuze, a single tail fuze or both which then served as a redundant trigger if the nose fuze failed. Soviet bombs are generally dark grey as the primary overall colour and typically are marked with designation weight in kilograms (e.g. FAB-50), fuze type, explosive or chemical filler and the number of auxiliary boosters (only found on bombs 250 kg or heavier). The tail fin will also include markings, such as year of manufacture, lot number produced from and factory number.

Data for FAB-50 (50 kg) bomb
Metric Imperial
Overall Length 93.6 cm 36.9 in
Body Diameter 21.9 cm 8.6 in
Filling Weight 24 kg 52.9 lb
Total Weight 64 kg 141 lb
Fuse Type Nose x
Fuse Type Tail
Explosive Filling TNT

Vehicles equipped with this weapon

Vehicles equipped with this weapon
Fighters 
I-15  I-15 WR · I-15 M-22 · I-15R · I-15bis
I-153  I-153 M-62 Chaika · Zhukovsky's I-153-M62 · I-153P Chaika
I-16  I-16 type 18 Ishak · I-16 type 24 Ishak · I-16 type 27 Ishak · I-16 type 28 Ishak
La-5  La-5 · La-5F · La-5FN
La-7  La-7 · Dolgushin's La-7 · La-7B-20
LaGG-3  LaGG-3-11 · LaGG-3-23 · LaGG-3-35 · LaGG-3-66
P-40  ▂P-40E-1 Kittyhawk
Yak-1  Yak-1 · Yak-1B
Yak-7  Yak-7B
Attackers 
IL-2  IL-2 (1941) · IL-2 (1942) · IL-2-37 · IL-2M type 3 · IL-2M "Avenger" · IL-2M (1943)
IL-10  IL-10 · IL-10 (1946)
Su-2  BB-1 · Su-2 (M-82) · Su-2 MV-5 · Su-2 TSS-1
Su-6  Su-6 (AM-42) · Su-6 (M-71F)
Tandem MAI  Tandem MAI
Bombers  ▂B-25J-30 Mitchell · DB-3B · IL-4 · MBR-2-M-34 · Pe-8 · Po-2
  Yer-2 (M-105) · Yer-2 (M-105) TAT-BT · Yer-2 (M-105R) LU-MV-2B · Yer-2 (M-105R) TAT-BT
Jet bombers  Tu-14T

General info

FAB-50 bombs are constructed one of two ways, either forged or welded. The forged version is a bomb body which is a single unit of forged steel, the nose shape is ogival, the midsection is cylindrical, and the aft section is conically tapering to where the base adapter is located in which the tail unit is attached[1]. This bomb was not designed to be utilised with a tail fuze. The tail unit of the forged bomb is of box construction and is held into place to the base of the bomb with a spanner lock nut. This version of the bomb has a striking resemblance to U.S. AN-M general purpose bombs of similar weights. A single suspension band is fitted to the bomb allowing fitting to either bomb bay shackles or external payload pylons.

Welded FAB-50 bombs are two forged steel sections of tear-drop shape which are fused just aft of where the suspension band is fitted. Like the forged bomb, the rear section is conical while the nose of the bomb is ogival which concludes at the fuze adapter. The base of the bomb has a threaded extension which the tail unit is attached and held with a locking nut. Also, like the forged bomb, the welded version cannot be fitted with a tail fuze. The tail assembly for the welded bomb consists of a cone which has four fins either welded or riveted along with four struts which act as supports for the fins through riveting. To allow the welded bombs to be fitted to an American bomb shackle (B-25J-30 and P-40E-1 specifically), an additional suspension band is added to the bomb for a total of two suspension bands[2].

Effective damage

The Soviet bombs featured in War Thunder are composed of straight TNT explosive filling, which was the preferred filling when it came to the larger FAB bombs, especially during peacetime when the explosives would be in storage for a long duration. A tell-tale sign of bombs using TNT is the black smoke which is produced from the oxygen-deficient explosion of TNT when detonated with a tetryl booster.

Typical crater size created from a FAB-50 bomb measured approximately .3 - .6 m in depth and 1.8 – 2.7 m[3] in diameter with a fragmentation radius of upwards of 68.6 meters.

FAB-50 (50 kg) damage table Metric Imperial
Max armor penetration high explosive action 79 mm 3.11 in
Radius of destruction of armored vehicle 2.1 m 6.89 ft
Radius of fragment dispersion 68.6 m 225 ft

Comparison with analogues

Comparable bombs to FAB-50 (50 kg)
Name Mass Explosive mass Explosive Armor Pen. Destruction radius Frag radius
AN-M30A1 100 lb 24.5 kg Amatol 79 mm 2.1 m 67.3 m
SC50JA 50 kg 25 kg Fp.60/40 80 mm 2.1 m 70.1 m
Type 97 Number 6 60 kg 23 kg TNT 78 mm 2.1 m 67 m
Type 94 GPHE 50 kg 19.6 kg TNT 74 mm 1.8 m 62.5 m
GP 50 58 kg 25 kg TNT 80 mm 2.1 m 70.1 m
D.T. No.2 55.7 kg 19.9 kg TNT 73 mm 2.1 m 67.4 m
G.A.M.Mn 50 50 kg 28.5 kg TNT 82 mm 2.4 m 77.1 m

Usage in battles

The FAB-50 (50 kg) is the lightest of the FAB series of bombs allowing it to be used between a wide range of fighters, attackers and bombers. The FAB-50 is a small bomb. However, it should not be discounted as it excels in use with low-level attacking or bombing aircraft. Even fighters which may carry one or two of these bombs can effectively take out a soft vehicle or AAA gun as a secondary target. Bombers which can carry a greater quantity can make short work of vehicle convoys or AAA clusters where blast radii will overlap and compound the damage inflicted to enemy targets. Unless these bombs are being dropped on a base, high altitude bombing of vehicles or AAA targets becomes very inaccurate, because the vehicles will have a chance to scatter or due to altitude and dropping of the bombs, the landing rate will be very wide between bombs and likelihood that most will miss the target.

Pros and cons

Pros:

  • Small bomb, can be outfitted on fighter aircraft
  • Bombing aircraft less likely to be hit by splash damage when low-level bombing (realistic and simulator battles)
  • Great bomb for disabling enemy aircraft capturing runways of domination maps

Cons:

  • Limited damage if dropped singly
  • Less effective when used at high altitude ( > 3,000 m)
  • Increased weight and drag, decrease the overall performance of aircraft

History

The Soviets had varying types of bombs, fuzes and fillers which they employed between 1939 and 1945. Early bombs used through 1942 were pre-war stock which was considered crude in design and manufacture, especially due to relying on unskilled labour and shortage of supervisory personnel in the manufacturing process. With old stock dwindling, a new effort was put into refining the design, manufacture and ballistic quality of the newer bombs.

While the Soviet bombs in War Thunder feature TNT filler, other fillers were used during the war in bombs such as the smaller FAB bombs (100 kg and under) typically used a 78% picric acid and 22% Dinitronapthalene mixture, similar to the Mélinite-Mononitro-nitronaphtaline (M.Mn) or Trimonite used by the French in their G.A.M.Mn 50 (50 kg) bombs. Other mixtures used by the Soviets include included 80/20 TNT/Ammonium Nitrate, 50/50 TNT/Ammonium Nitrate and 80/20 TNT/Dinitronapthalene.

Media

An excellent addition to the article would be a video guide, as well as screenshots from the game and photos.

See also

Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:

  • reference to the article about the variant of the cannon/machine gun;
  • references to approximate analogues by other nations and research trees.

External links

Paste links to sources and external resources, such as:

  • topic on the official game forum;
  • encyclopedia page on the weapon;
  • other literature.


Bombs
USA 
100 lb  AN-M30A1
250 lb  AN-M57 · LDGP Mk 81
500 lb  AN-M64A1 · LDGP Mk 82
750 lb  M117 cone 45 · M117 cone 90
1,000 lb  AN-M65A1 · AN-M65A1 Fin M129 · LDGP Mk 83
2,000 lb  AN-M66A2 · LDGP Mk 84
Germany 
10 kg  SD10C
50 kg  SC50JA
250 kg  SC250JA
500 kg  SC500K
1,000 kg  SC1000L2
1,400 kg  PC 1400 X (Fritz X)
1,800 kg  SC1800B
USSR 
25 kg  AO-25M-1
50 kg  FAB-50
100 kg  FAB-100 · OFAB-100
250 kg  FAB-250M43 · OFAB-250-270
500 kg  FAB-500 · FAB-500M-54
1,000 kg  FAB-1000
1,500 kg  FAB-1500M-46
3,000 kg  FAB-3000M-46
5,000 kg  FAB-5000
Britain 
250 lb  G.P. 250 lb Mk.IV
500 lb  G.P. 500 lb Mk.IV · H.E. M.C. Mk.II
1,000 lb  G.P. 1,000 lb Mk.I · M.C. 1000 lb Mk.I
4,000 lb  H.C. 4,000 lb Mk.II
Japan 
Army 
50 kg  Type 94 50 kg
100 kg  Type 94 100 kg
250 kg  Type 92 250 kg
500 kg  Type 92 500 kg
Navy 
60 kg  Type 97 №.6
250 kg  №.25 Model 2 · Type 98 №.25
500 kg  №.50 Model 2 · Type 2 №.50 Model 1 GP(SAP)
800 kg  №.80 Model 1 · Type 99 №.80 AP
Foreign 
750 lb  JM117 cone 45
Italy 
50 kg  GP 50
100 kg  GP 100 · SAP 100
250 kg  GP 250
500 kg  GP 500
800 kg  GP 800
France 
50 kg  G.A.M.Mn 50 · D.T. №.2 · Type 61C
100 kg  100 №.1
200 kg  200 №.1
500 kg  500 №.2