A preliminary design (no.1) for a 70,000 ton battleship based upon the proposal of Senator Benjamin Tillman, comparable to the later "Montana" design of 1940
"Maximum Battleship" Design no.1

The "Maximum Battleships", also known as the "Tillman Battleships", were a series of World War I-era design studies for extremely large battleships, prepared in late 1916 and early 1917 upon the order of Senator "Pitchfork" Benjamin Tillman[1] by the Bureau of Construction and Repair (C&R) of the United States Navy.[2] They helped influence design work on the Pennsylvania and first South Dakota classes of battleships. The plans prepared for the senator were preserved by C&R in the first of its "Spring Styles" books, where it kept various warship designs conceptualized between 1911 and 1925.

A preliminary design (no.2) for a 70,000 ton battleship, differing from Design 1 in having 24 16-inch guns in 4 sextuple turrets in exchange for reduced armor
"Maximum Battleship" Design no.2

Context

During the years leading up to World War I, some members of the U.S. Congress were growing frustrated with what they perceived to be chronic overspending by the U.S. Navy on battleships.[3]

A preliminary design (no.3) for a 63,500 ton battleship based upon the proposal of Senator Benjamin Tillman with a higher speed but lighter displacement
"Maximum Battleship" Design no.3

The only limits on the potential size of an American battleship were the dimensions of the locks of the Panama Canal. The locks measure roughly 1,000 by 110 feet (305 m × 34 m), and so the "maximum battleships" were 975 by 108 feet (297 m × 33 m). The Panamax draft limit during the designing of these battleships was 39 feet 6 inches (12.04 m), however the Department of the Navy required that all designs be limited to only 34 feet (10 m) in draft.[2]

Designs

A preliminary design (no.4) for an 80,000 ton battleship based upon the proposal of Senator Benjamin Tillman. It was a mixture of the best designs in armor and firepower, paying for this in increased displacement and slower speed.
"Maximum Battleship" Design no,4

Tillman's first request for designs of so-called "maximum battleship" in 1912–1913 led to several estimates for battleships unconstrained by cost. Created by the US Navy Bureau of Construction and Repair (C&R), these ships would displace up to 38,000 long tons (39,000 t) and carry 14 inch guns. Although C&R was "appalled," in the words of naval historian Norman Friedman, by the extravagance of these designs, they admitted that far larger warships could transit the Panama Canal's locks, which, due to the US's geography, were often held to be the final limiting factor on the size of a US warship. Such larger designs would be often and seriously proposed within only a few years.[4]

In 1916, Tillman repeated his request, and C&R produced another series of design studies. C&R drew up four blueprints, all ships having varying characteristics despite being built on the same hull:

  • Tillman I - Armed with 12 16-inch guns in four superfiring triple turrets (two at the bow, two at the stern), with a considerable 18-inch thick armor belt and a speed of 26.5 knots.
  • Tillman II - Armed with 24 16-inch guns in four superfiring turrets in the same layout as "Tillman I", but with 6 guns in each turret. Her speed was kept the same so the weight for the additional guns was gained by reducing the thickness of the armor belt.
  • Tillman III - A return to the armament of "Tillman I", with the reduced armor of "Tillman II" and an increased speed of 30 knots on displacement of 63,500 tons.
  • Tillman IV - Using the sextuple turrets and layout of "Tillman II", Tillman IV retained the 18-inch belt of "Tillman I" in exchange for dropping speed to 25.2 knots, all with an increase in displacement to 80,000 tons.
  • Tillman IV-1 - One of the two sub-designs that came out of refinement of Tillman IV. Armed instead with 13 18-inch guns in five twin and one triple turret. It dropped the 18-inch belt to an 16-inch belt. It kept the same displacement as Tillman IV.
  • Tillman IV-2 - The second of the two sub-designs that came out of refinement of Tillman IV. Armed instead with 15 18-inch guns in five triple turrets. It kept the 16-inch belt of IV-1. It also kept the same displacement as Tillman IV.

Comparisons to other US Navy battleships

The Tillman designs all included five casemate guns mounted aft, two on each side and one at the tip of the stern. Similar "stern chasers" had been previously mounted in Nevada, but were omitted from the Pennsylvania class. These casemates were a return to an older design idea; American battleship designers had abandoned hull-mounted casemates after the New Mexico class. They had transpired to be too "wet" – heavy seas rendered them unusable—and they had been removed from all earlier classes.

Tillman ITillman IITillman IIITillman IVTillman IV-1Tillman IV-2South Dakota classIowa classMontana class
Design 13 Dec 191613 Dec 191613 Dec 191629 Dec 191630 Jan 191730 Jan 19178 Jul 19189 Jun 19386 Feb 1940
Displace-
ment
70,000 short tons (63,500 t)70,000 short tons (63,500 t)63,500 short tons (57,600 t)80,000 short tons (72,600 t)80,000 short tons (72,600 t)80,000 short tons (72,600 t)43,200 short tons (39,200 t)45,000 short tons (40,800 t)70,000 short tons (63,500 t)
Length 975 feet (297 m)660 feet (200 m)860 feet (260 m)921 feet (281 m)
Beam 108 feet (33 m)106 feet (32 m)108 feet (33 m)121 feet (37 m)
Draft 32 feet 9 inches (10 m)32 feet 9 inches (10 m)36 feet (11 m)36 feet (11 m)
Speed 26.5 knots (49.1 km/h; 30.5 mph)26.5 knots (49.1 km/h; 30.5 mph)30 knots (56 km/h; 35 mph)25.2 knots (46.7 km/h; 29.0 mph)25.2 knots (46.7 km/h; 29.0 mph)25.2 knots (46.7 km/h; 29.0 mph)23.5 knots (43.5 km/h; 27.0 mph)33 knots (61 km/h; 38 mph)28 knots (52 km/h; 32 mph)
Main
battery
(12) 16-inch (406 mm), 50-caliber guns in four triple turrets(24) 16-inch (406 mm), 50-caliber guns in four six-gun turrets(12) 16-inch (406 mm), 50-caliber guns in four triple turrets(24) 16-inch (406 mm), 50-caliber guns in four six-gun turrets(13) 18-inch (457 mm), 50-caliber guns in five twin and one triple turret(15) 18-inch (457 mm), 50-caliber guns in five triple turrets(12) 16-inch (406 mm), 50-caliber guns in four triple turrets(9) 16-inch (406 mm), 50-caliber guns in three triple turrets(12) 16-inch (406 mm), 50-caliber guns in four triple turrets
Belt
armor
9–18-inch (229–457 mm)7–13-inch (178–330 mm)7–13-inch (178–330 mm)8–19-inch (203–483 mm)8–16-inch (203–406 mm)8–16-inch (203–406 mm)8–13.5-inch (203–343 mm)4–12.1-inch (102–307 mm)10.2–16.1-inch (259–409 mm)
Barbette
armor
5–17-inch (127–432 mm)4–12.5-inch (102–318 mm)}4–12.5-inch (102–318 mm)5–17-inch (127–432 mm)5–15-inch (127–381 mm)5–15-inch (127–381 mm)4.5–13.5-inch (114–343 mm)11.6–17.3-inch (295–439 mm)18–21.3-inch (457–541 mm)
Conning
Tower
armor
6–18-inch (152–457 mm)6–16-inch (152–406 mm)6–16-inch (152–406 mm)9–18-inch (229–457 mm)6–18-inch (152–457 mm)6–18-inch (152–457 mm)16-inch (406 mm)17.3-inch (439 mm)18-inch (457 mm)
A design intended to make the earlier designs of the "Tillman" battleships more feasible, with a displacement of 80,000 tons, 13 18-inch guns, and a 16-inch armor belt
"Maximum Battleship" Design IV-1
Practically very similar to design IV-1, the IV-2 simply placed the 18-inch guns into a uniform triple-turret configuration and moved the midships turrets further back
"Maximum Battleship" Design IV-2

Fate of the designed battleships

The Washington Naval Treaty of 1922 limited naval armaments, causing the cancellation of the South Dakotas and halting all consideration of the "maximum battleships."

See also

  • HMS Incomparable
  • Gavrilov's battleship project - Russian project proposed by head of Russo-Baltic Shipyard, Ivan Gavrilov, ( Reval 1914, 265/34,4/9,15 m, 16x406/45, 24x152/55, 30 knots)

References

  1. Senate Congressional Record of the USA. Vol. 53. Library of Congress. 21 June 1916. p. 9680. Retrieved 14 September 2021 via Congress.gov.
  2. 1 2 Zimm, A. D. (1975). "Build the Limit: The American "Maximum Battleship" Designs of 1916-17". Warship International. International Naval Research Organization. 12 (1): 31–59. JSTOR 44890389. Retrieved 14 September 2021 via JSTOR.
  3. Senate Congressional Record of the USA. Vol. 51. Library of Congress. 2 June 1914. p. 9638-9651. Retrieved 4 October 2021 via Congress.gov.
  4. Friedman, US Battleships, 148–149.

Bibliography

  • Friedman, Norman. Battleship Design and Development, 1905–1945. New York: Mayflower Books, 1978. ISBN 0-8317-0700-3. OCLC 4505348.
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