Vermont 1910
| No | Name | Builder | Laid down | Launched | Comm | Fate |
| BB20 | Vermont | Fore River, Quincy | 21/5/1904 | 31/8/1905 | 4/3/1907 | stricken 11/1923 |
| BB21 | Kansas | New York SB, Camden | 10/2/1904 | 12/8/1905 | 18/4/1907 | stricken 11/1923 |
| BB22 | Minnesota | Newport News | 27/10/1903 | 8/4/1905 | 9/3/1907 | stricken 11/1923 |
| BB25 | New Hampshire | New York SB, Camden | 1/5/1905 | 30/6/1906 | 19/3/1908 | stricken 11/1923 |
|
Displacement normal, t |
16000 |
|
Displacement full, t |
17666 |
|
Length, m |
139.1 |
|
Breadth, m |
23.4 |
|
Draught, m |
7.47 |
|
No of shafts |
2 |
|
Machinery |
VTE, 12 Babcock & Wilcox boilers |
|
Power, h. p. |
16500 |
|
Max speed, kts |
18 |
|
Fuel, t |
BB20: coal 2405 BB21: coal 2310 BB22: coal 2387 BB23: coal 2287 |
|
Armour, mm |
BB20 - 22: Krupp and Harvey steel - belt: 229 - 178 (178 - 102 at ship ends), bulkheads: 178, deck: 76 - 38, barbettes: 254 - 152, main gun turrets: 305 - 203, secondary gun turrets: 165 - 51, casemates: 178 - 95, CT: 229 BB25: Krupp and Harvey steel - belt: 229 - 178 (178 - 102 at ship ends), bulkheads: 178, deck: 76 - 38, barbettes: 279 - 152, main gun turrets: 305 - 203, secondary gun turrets: 165 - 51, casemates: 178 - 95, CT: 229 |
|
Armament |
BB20: 2 x 2 - 305/45 Mk 5/6, 4 x 2 - 203/45 Mk 6, 12 x 1 - 178/45 Mk 2, 20 x 1 - 76/50 Mk 2/3/5/6/8, 10 x 1 - 47/(40 - 50) Mk 1 - 11, 2 x 1 - 37/(20 - 50) Mk 1 - 15, 4 - 533 TT (beam) BB21, 22: 2 x 2 - 305/45 Mk 5/6, 4 x 2 - 203/45 Mk 6, 12 x 1 - 178/45 Mk 2, 20 x 1 - 76/50 Mk 2/3/5/6/8, 12 x 1 - 47/(40 - 50) Mk 1 - 11, 2 x 1 - 37/(20 - 50) Mk 1 - 15, 4 - 533 TT (beam) BB25: 2 x 2 - 305/45 Mk 5/6, 4 x 2 - 203/45 Mk 6, 12 x 1 - 178/45 Mk 2, 20 x 1 - 76/50 Mk 2/3/5/6/8, 2 x 1 - 37/(20 - 50) Mk 1 - 15, 4 - 533 TT (beam) |
|
Complement |
BB20 - 22: 880 BB25: 850 |
Ship project history: The most perfect pre-dreadnoughts of the USN possessing with good seaworthiness. One big lack was presence of two intermediate calibres (203 and 178mm): that extremely complicated fire control. First two ships of a series (Connecticut and Louisiana) differed from others on details of armour protection a little and are sometimes outlined in separate class.
Ship protection: Main belt had 2.44m height (1.3m over and 1.14m under waterline). 88.4m long amidships part of belt was 279mm thick at 1.6m upper part tapering to 229mm at lower edge. Next 14.9m fore and aft parts of belt were 229mm at upper edge tapering to 178mm at lower edge. Ship ends were closed by 2.43m in height (0.91m over and 1.52m under waterline) 178-127mm, later 127mm and finally 102mm armour. Belt was connected with main gun barbettes by 178mm bulkheads. There was 152mm upper belt. 38mm armoured deck over citadel had 76mm slopes and connected with lower edge of main belt. It was 76mm in flat part and had 76mm slopes at ship ends. Main gun turrets had 305mm faces, 203mm sides and rears and 64mm crowns. Secondary gun turrets had 165mm faces, 152mm sides and rears and 51mm crowns. 6`` guns had 152mm armour.
Modernizations: 1909 - 1910, Vermont: - 10 x 1 - 47/(40 - 50); cage masts were installed.
1909 - 1910, Kansas, Minnesota: - 12 x 1 - 47/(40 - 50); cage masts were installed.
1919, all: - 12 x1 - 178/45 (may be temporarily), 8 x 1 - 76/50; + 2 x 1 - 76/50 Mk 10 AA
Naval service: Minnesota 29/9/1918 was badly damaged by a mine laid by German submarine U117 but has been repaired and again put into operation. All ships were stricken under the terms of Washington Treaty.
New Hampshire
© Ivan Gogin, 2008-10