Benjamin Franklin-class submarine: Difference between revisions

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{{short description|Submarine class of the United States Navy}}
{{short description|Submarine class of the United States Navy}}
{{Use dmy dates|date=November 2020}}
{{Use dmy dates|date=November 2020}}
{|{{Infobox ship begin}}
{{Infobox ship
{{Infobox ship image
|section1={{Infobox ship/image
|Ship image=USS Benjamin Franklin (SSBN-640).gif
|image=USS Benjamin Franklin (SSBN-640).gif
|Ship caption={{USS|Benjamin Franklin|SSBN-640|6}}
|image_caption={{USS|Benjamin Franklin|SSBN-640|6}}
}}
}}
{{Infobox ship class overview
 
|Name=''Benjamin Franklin'' class
|section2={{Infobox ship/class overview
|Builders=*[[General Dynamics Electric Boat|Electric Boat]], CT (6)
|name=''Benjamin Franklin'' class
*[[Newport News Shipbuilding]], VA (4)
|builders=*[[General Dynamics Electric Boat|Electric Boat]], CT (6)
*[[Mare Island Naval Shipyard]],<ref name="Conways p612">Gardiner and Chumbley 1995, p.612.</ref> CA (2)
          *[[Newport News Shipbuilding]], VA (4)
|Operators={{naval|United States}}
          *[[Mare Island Naval Shipyard]],<ref name="Conways p612">Gardiner and Chumbley 1995, p.612.</ref> CA (2)
|Class before={{sclass|James Madison|submarine|4}}  
|operators={{naval|United States}}
|Class after={{sclass|Ohio|submarine|4}}
|class_before={{sclass|James Madison|submarine|4}}  
|Subclasses=
|class_after={{sclass|Ohio|submarine|4}}
|Cost=
|subclasses=
|Built range=1963–1967<ref name="Conways p612"/>
|cost=
|In service range=
|built_range=1963–1967<ref name="Conways p612"/>
|In commission range= 1965–2002<ref>{{cite web |url=http://www.navsource.net/archives/08/06idx.htm |title=''Benjamin Franklin'' class |website=NavSource}}</ref>
|in_service_range=
|Total ships building=
|in_commission_range= 1965–2002<ref>{{cite web |url=http://www.navsource.net/archives/08/06idx.htm |title=''Benjamin Franklin'' class |website=NavSource}}</ref>
|Total ships planned=
|total_ships_building=
|Total ships completed=12
|total_ships_planned=
|Total ships cancelled=
|total_ships_completed=12
|Total ships active=
|total_ships_canceled=
|Total ships laid up=
|total_ships_active=
|Total ships lost=
|total_ships_laid_up=
|Total ships retired=12
|total_ships_lost=
|Total ships preserved=
|total_ships_retired=12
}}
|total_ships_preserved=
{{Infobox ship characteristics
}}
|Hide header=
 
|Header caption=
|section3={{Infobox ship/characteristics
|Ship type=[[Nuclear submarine|Nuclear-powered]] [[ballistic missile submarine]]
|hide_header=
|Ship displacement=Surfaced: {{convert|7325|LT|t|0|lk=in|abbr=on}}
|header_caption=
|type=[[Nuclear submarine|Nuclear-powered]] [[ballistic missile submarine]]
|displacement=Surfaced: {{convert|7325|LT|t|0|lk=in|abbr=on}}
Submerged: {{convert|8251|LT|t|0|lk=in|abbr=on}}<ref name="FriedmanSubs1">{{cite book | last = Friedman | first = Norman | title = U.S. Submarines Since 1945: An Illustrated Design History | publisher = [[United States Naval Institute]] | year = 1994 | location = [[Annapolis, Maryland]] | pages = 199–203, 244 | isbn = 1-55750-260-9 }}</ref>
Submerged: {{convert|8251|LT|t|0|lk=in|abbr=on}}<ref name="FriedmanSubs1">{{cite book | last = Friedman | first = Norman | title = U.S. Submarines Since 1945: An Illustrated Design History | publisher = [[United States Naval Institute]] | year = 1994 | location = [[Annapolis, Maryland]] | pages = 199–203, 244 | isbn = 1-55750-260-9 }}</ref>
|Ship length={{convert|425|ft|m|abbr=on}}<ref name="FriedmanSubs1"/>
|length={{convert|425|ft|m|abbr=on}}<ref name="FriedmanSubs1"/>
|Ship beam={{convert|33|ft|m|abbr=on}}<ref name="FriedmanSubs1"/>
|beam={{convert|33|ft|m|abbr=on}}<ref name="FriedmanSubs1"/>
|Ship draft={{convert|28|ft|6|in|m|abbr=on}}<ref name="FriedmanSubs1"/>
|draft={{convert|28|ft|6|in|m|abbr=on}}<ref name="FriedmanSubs1"/>
|Ship depth=
|depth=
|Ship power=
|power=
|Ship propulsion=*1 × [[S5W]] [[Pressurized water reactor|PWR]]
|propulsion=*1 × [[S5W]] [[Pressurized water reactor|PWR]]
*2 geared [[steam turbine]]s ({{convert|15000|shp|abbr=on}}),
            *2 geared [[steam turbine]]s ({{convert|15000|shp|abbr=on}}),
*1 shaft<ref name="FriedmanSubs1"/>
            *1 shaft<ref name="FriedmanSubs1"/>
|Ship speed=*{{convert|16|kn|abbr=on}} surfaced
|speed=*{{convert|16|kn|abbr=on}} surfaced
*{{convert|21|kn|abbr=on}} submerged<ref name="FriedmanSubs1"/>
        *{{convert|21|kn|abbr=on}} submerged<ref name="FriedmanSubs1"/>
|Ship range=
|range=
|Ship endurance=
|endurance=
|Ship test depth={{convert|1300|ft|m}}<ref name="FriedmanSubs1"/>
|test_depth={{convert|1300|ft|m}}<ref name="FriedmanSubs1"/>
|Ship complement=Two crews of 14 officers and 126 enlisted<ref name="FriedmanSubs1"/>
|complement=Two crews of 14 officers and 126 enlisted<ref name="FriedmanSubs1"/>
|Ship sensors=
|sensors=
|Ship EW=
|EW=
|Ship armament=*16 [[Polaris missile|Polaris A3]] or [[UGM-73 Poseidon|Poseidon C3]] or [[UGM-96 Trident I|Trident I C4 missiles]]
|armament=*16 [[Polaris missile|Polaris A3]] or [[UGM-73 Poseidon|Poseidon C3]] or [[UGM-96 Trident I|Trident I C4 missiles]]
* 4 × [[American 21-inch torpedo|21-inch (533 mm)]] [[torpedo tube]]s, 13 [[torpedoes]]<ref name="FriedmanSubs1"/>
          * 4 × [[American 21-inch torpedo|21-inch (533 mm)]] [[torpedo tube]]s, 13 [[torpedoes]]<ref name="FriedmanSubs1"/>
|Ship notes=
|notes=
}}
}}
}}
|}
The '''''Benjamin Franklin'' class''' of [[United States Navy|US]] [[ballistic missile submarine]]s were in service from the 1960s to the 2000s. The class was an evolutionary development from the earlier {{sclass|James Madison|submarine|4}} of fleet ballistic missile submarine.  Having quieter machinery and other improvements, it is considered a separate class. A subset of this class is the re-engineered 640 class starting with {{USS|George C. Marshall|SSBN-654|6}}. The primary difference was that they were built under the new SUBSAFE rules after the loss of {{USS|Thresher|SSN-593|6}}, earlier boats of the class had to be retrofitted to meet SUBSAFE requirements.  The ''Benjamin Franklin'' class, together with the {{sclass|George Washington|submarine|5}}, {{sclass|Ethan Allen|submarine|5}}, {{sclass|Lafayette|submarine|5}}, and ''James Madison'' classes, comprised the "[[41 for Freedom]]" submarines that were the Navy's primary contribution to the [[nuclear deterrent]] force through the late 1980s. This class and the ''James Madison'' class are combined with the ''Lafayette''s in some references.
The '''''Benjamin Franklin'' class''' of [[United States Navy|US]] [[ballistic missile submarine]]s were in service from the 1960s to the 2000s. The class was an evolutionary development from the earlier {{sclass|James Madison|submarine|4}} of fleet ballistic missile submarine.  Having quieter machinery and other improvements, it is considered a separate class. A subset of this class is the re-engineered 640 class starting with {{USS|George C. Marshall|SSBN-654|6}}. The primary difference was that they were built under the new SUBSAFE rules after the loss of {{USS|Thresher|SSN-593|6}}, earlier boats of the class had to be retrofitted to meet SUBSAFE requirements.  The ''Benjamin Franklin'' class, together with the {{sclass|George Washington|submarine|5}}, {{sclass|Ethan Allen|submarine|5}}, {{sclass|Lafayette|submarine|5}}, and ''James Madison'' classes, comprised the "[[41 for Freedom]]" submarines that were the Navy's primary contribution to the [[nuclear deterrent]] force through the late 1980s. This class and the ''James Madison'' class are combined with the ''Lafayette''s in some references.


Latest revision as of 17:46, 3 November 2025

Template:Short description Template:Use dmy dates Template:Infobox ship The Benjamin Franklin class of US ballistic missile submarines were in service from the 1960s to the 2000s. The class was an evolutionary development from the earlier Template:Sclass of fleet ballistic missile submarine. Having quieter machinery and other improvements, it is considered a separate class. A subset of this class is the re-engineered 640 class starting with Template:USS. The primary difference was that they were built under the new SUBSAFE rules after the loss of Template:USS, earlier boats of the class had to be retrofitted to meet SUBSAFE requirements. The Benjamin Franklin class, together with the Template:Sclass, Template:Sclass, Template:Sclass, and James Madison classes, comprised the "41 for Freedom" submarines that were the Navy's primary contribution to the nuclear deterrent force through the late 1980s. This class and the James Madison class are combined with the Lafayettes in some references.

Design

The Benjamin Franklin-class submarines were built with the Polaris A-3 ballistic missile, and in the early 1970s were converted to carry the Poseidon C-3 missile. During the late 1970s and early 1980s, six boats were further modified to carry the Trident I (C-4) missile, along with six James Madison-class boats. These were Benjamin Franklin, Simon Bolivar, George Bancroft, Henry L. Stimson, Francis Scott Key, and Mariano G. Vallejo.[1]

In response to the loss of Template:USS in April 1963, this class was designed to SUBSAFE standards and its equipment was similar to the Template:Sclass fast attack submarines (SSNs). Previous US SSBNs except the George Washington class had equipment similar to the Template:Sclass SSNs.

This class can be distinguished by the fairwater planes' location halfway up the sail; the Lafayettes and James Madisons had the fairwater planes in the upper front portion of the sail.

Two submarines of this class were converted for delivery of up to 66 SEALs or other Special Operations Forces each. In the early 1990s, to make room for the Template:Sclass ballistic missile submarines within the limits set by the SALT II strategic arms limitation treaty, the ballistic missile tubes of Template:USS and Template:USS were disabled. Those boats were redesignated special operations attack submarines and given attack submarine (SSN) hull classification symbols. They were equipped with dry deck shelters to accommodate SEAL Delivery Vehicles or other equipment.[1]

Fate

The Benjamin Franklins were decommissioned between 1992 and 2002 to comply with SALT II treaty limitations as the Template:Sclass SSBNs entered service, for their age, and because of the collapse of the Soviet Union.[1] USS Kamehameha was decommissioned on 2 April 2002, the last ship of the Benjamin Franklin class to be decommissioned.[2]

The sail of George Bancroft is preserved at the Naval Submarine Base King's Bay, Georgia. James K. PolkTemplate:'s sail is on display at the National Museum of Nuclear Science & History[3] in Albuquerque, New Mexico. Mariano G. VallejoTemplate:'s sail is preserved at Mare Island, California, where she was built. The sail of Lewis and Clark is on display at the Patriot's Point Maritime Museum in Charleston, South Carolina.

Boats in class

List of Benjamin Franklin-class submarines[1]
Name Hull no. Builder Laid down Launched Commissioned Decommissioned FateTemplate:Efn-lg
Template:USSTemplate:NbspTemplate:Efn-lg SSBN-640 General Dynamics Electric Boat 25 May 1963 5 December 1964 22 October 1965 23 November 1993 disp. 1995
Template:USSTemplate:NbspTemplate:Efn-lg SSBN-641 Newport News Shipbuilding and Drydock Co. 17 April 1963 22 August 1964 29 October 1965 8 February 1995 disp. 1995
Template:USS SSBN-642 Mare Island Naval Shipyard 2 May 1963 16 January 1965 10 December 1965 2 April 2002 disp. 2003
Template:USSTemplate:NbspTemplate:Efn-lg SSBN-643 General Dynamics Electric Boat 24 August 1963 20 March 1965 22 January 1966 21 September 1993 disp. 1998
Template:USS SSBN-644 Newport News Shipbuilding and Drydock Co. 29 July 1963 21 November 1964 22 December 1965 27 June 1992 disp. 1996
Template:USS SSBN-645 General Dynamics Electric Boat 23 November 1963 22 May 1965 16 April 1966 8 July 1999 disp. 2000
Template:USS SSBN-654 Newport News Shipbuilding and Drydock Co. 2 March 1964 21 May 1965 29 April 1966 24 September 1992 disp. 1994
Template:USSTemplate:NbspTemplate:Efn-lg SSBN-655 General Dynamics Electric Boat 4 April 1964 13 November 1965 20 August 1966 5 May 1993 disp. 1994
Template:USS SSBN-656 Newport News Shipbuilding and Drydock Co. 24 August 1964 14 August 1965 15 June 1966 18 March 1993 disp. 1994
Template:USSTemplate:NbspTemplate:Efn-lg SSBN-657 General Dynamics Electric Boat 5 December 1964 23 April 1966 3 December 1966 2 September 1993 disp. 1995
Template:USSTemplate:NbspTemplate:Efn-lg SSBN-658 Mare Island Naval Shipyard 7 July 1964 23 October 1965 16 December 1966 9 March 1995 disp. 1995
Template:USS SSBN-659 General Dynamics Electric Boat 20 March 1965 21 July 1966 1 April 1967 12 April 1993 disp. 1994

Template:Notelist-lg

See also

References

Citations

Template:Reflist

Sources

External links

Template:Sister project

Template:Military navigation Template:US submarine classes after 1945

  1. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named Conways p612
  2. ↑ Script error: No such module "citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".
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