Difference between revisions of "21 inch Mk.20 Bidder (533 mm)"

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(History: Added some history from the development of the mk20 bidder)
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== History ==
 
== History ==
''Examine the history of the creation and combat usage of the weapon in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Weapon-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>.''
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The Mark 20 Bidder was designed around the 1950s. It was intended to become the designated torpedo for both new submarines and surface ships. The Mark 20S was intended to equip the submarines, while the Mark 20E was to be used on surface ships. Both types of torpedoes was passive-seeking battery powered. However, the Mark 20S was smaller than the Mark 20E. The S had a single-speed setting at 20 knots, while the E had a dual-speed mode for target search and attack. The velocity of the E was, respectively, 15 knots and 24 knots. At 15 knots the torpedo had a range of 18000 m, while when running in attack mode at 24 knots it had a range of 5500 m.
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The torpedo was to be equipped on the Rothesay and Whitby ([[HMS Blackpool]]) class frigates, and some of these ships had torpedo tubes fitted and was ready to receive them. However, due to problems with the programming of the torpedo, the weapon was never fitted nor used by any of these classes. Some years after, the Mark 20E was proposed for the Leander class destroyers, but that consideration was eliminated in the 1960s.
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The Mark 20S remained operational in the submarine service up until the 1980s.
  
 
== Media ==
 
== Media ==
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== See also ==
 
== See also ==
 
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
 
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
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* ''reference to the article about the variant of the weapon;''
 
* ''reference to the article about the variant of the weapon;''
 
* ''references to approximate analogues by other nations and research trees.''
 
* ''references to approximate analogues by other nations and research trees.''
  
 
== External links ==
 
== External links ==
''Paste links to sources and external resources, such as:''
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https://en.wikipedia.org/wiki/British_21-inch_torpedo#Mark_20_Bidder<nowiki/>{{Torpedoes}}
* ''topic on the official game forum;''
 
* ''other literature.''
 
 
 
{{Torpedoes}}
 
  
 
[[Category:Naval special armaments]]
 
[[Category:Naval special armaments]]

Revision as of 14:35, 9 April 2024

Description

Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.

Vehicles equipped with this weapon

General info

Tell us about the tactical and technical characteristics of the torpedo.

Effective damage

Describe the type of damage produced by this type of torpedo (high explosive, splash damage, etc)

Comparison with analogues

Give a comparative description of torpedoes that have firepower equal to this weapon.

Usage in battles

Describe situations when you would utilise this torpedo in-game (vehicle, pillbox, base, etc)

Pros and cons

Pros:

  • Very long travel distance

Cons:

  • Slow torpedo
  • No Torpedo mode to influence distance and speed.
  • Small warhead size

History

The Mark 20 Bidder was designed around the 1950s. It was intended to become the designated torpedo for both new submarines and surface ships. The Mark 20S was intended to equip the submarines, while the Mark 20E was to be used on surface ships. Both types of torpedoes was passive-seeking battery powered. However, the Mark 20S was smaller than the Mark 20E. The S had a single-speed setting at 20 knots, while the E had a dual-speed mode for target search and attack. The velocity of the E was, respectively, 15 knots and 24 knots. At 15 knots the torpedo had a range of 18000 m, while when running in attack mode at 24 knots it had a range of 5500 m.

The torpedo was to be equipped on the Rothesay and Whitby (HMS Blackpool) class frigates, and some of these ships had torpedo tubes fitted and was ready to receive them. However, due to problems with the programming of the torpedo, the weapon was never fitted nor used by any of these classes. Some years after, the Mark 20E was proposed for the Leander class destroyers, but that consideration was eliminated in the 1960s.

The Mark 20S remained operational in the submarine service up until the 1980s.

Media

Excellent additions to the article would be video guides, 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 weapon;
  • references to approximate analogues by other nations and research trees.

External links

https://en.wikipedia.org/wiki/British_21-inch_torpedo#Mark_20_Bidder

Torpedoes
USA 
450 mm  Mk.7
533 mm  Bliss-Leavitt Mk.1 · Mark 35 · Mk.8 · Mk.8-3 C/D · Mk.15 · Mk.16
569 mm  Mk.13 · Mk.13-6 · Mk.13-6 Case
Germany 
324 mm  Mark 44
450 mm  C/06D · LT 1A/1 · F5W · F5b
500 mm  G7 · G6c
533 mm  G7a · Seal DM2A1
600 mm  H/8
USSR 
400 mm  SET-40 · SET-72
450 mm  Pattern 1910 · Pattern 1912 · 45-36NU · 45-36AN · 45-36MAN
533 mm  53-38 · 53-39 · 53-56 · 53-57 · 53-65 · SET-53M · SET-65
Britain 
450 mm  R.G.F. Mark VI** · Mark XII · Mark XV
533 mm  Mark I · Mk.IV · Mk.V · Mk.VIII · Mk.IX · Mk.IX** · 21 inch Mk.20 Bidder
Japan 
324 mm  Mark 46
450 mm  Type 2 · Type 38 No.2 B · Type 43 · Type 44 No.2 · Type 91 Model 2 · Type 91 Model 3
533 mm  Type 6 · Type 43 (1910) · Type 54 Model 3 · Type 72 Model 1 · Type 89
610 mm  Type 8 No.2 · Type 90 · Type 93 Model 1, Mod 2 · Type 93 Model 3
Italy 
450 mm  F200/450 · S.I.170/450X5,25 · W.200/450X5,75 · Whitehead A 110/450
533 mm  S.I.270 · S.I. 250/533,4X7,5 Tipo A · S.I. 270/533,4X7,2 Tipo I · S.I. 270/533X6.84 Tipo L · S.I. 270/533,4X7,2 Tipo M
France 
400 mm  1926DA
450 mm  1909R
550 mm  L3 · Model 1919V · Model 1923DT
Sweden 
450 mm  m/38 · m/41
  † = Aerial torpedo
‡ = Aerial and ship-launched torpedo