NAVYPEDIA

Photo

Mahopac in the Appomattox river 1 January 1864

Ships

No	Name	Yard No	Builder	Laid down	Launched	Comm	Fate
	Canonicus, 6.1869- Scylla, 8.1869- Canonicus		Harrison Loring, Boston	1862	1.8.1863	16.4.1864	sold 2.1908
	Catawba		Alex Swift & Niles Wks, Cincinnati	1862	13.4.1864	never (completed 10.6.1865)	to Peru 4.1868 (Atahualpa)
	Mahopac		Secor, Jersey City	1862	17.5.1864	22.9.1864	sold 3.1902
	Manayunk, 6.1869- Ajax		Snowden & Mason, Pittsburgh	1862	18.12.1864	1.1.1871 (completed 27.9.1865)	to Naval Militia 9.1895-7/1898, sold 10.1899
	Manhattan, 6.1869- Neptune, 8.1869- Manhattan		Perine, Secor, Jersey City	1862	14.10.1863	6.6.1864	for disposal 12.1901
	Oneota		Alex Swift & Niles Wks, Cincinnati	1862	21.5.1864	never (completed 10.6.1865)	to Peru 1868 (Manco Capac)
	Saugus, 6.1869- Centaur, 8.1869- Saugus		Harlan & Hollingsworth, Wilmington	1862	16.12.1863	7.4.1864	sold 5.1891
	Tecumseh		Secor, Jersey City	1862	12.9.1863	19.4.1864	sunk 5.8.1864
	Tippecanoe, 6.1869- Vesuvius, 8.1869- Wyandotte		Miles Greenwood, Cincinnati	9.1862	22.12.1864	24.1.1876 (completed 12.1865, delivered 15.2.1866)	station ship 1879, to Naval Militia 1896-4/1898, sold 1.1899

Technical data

Displacement normal, t	2100
Displacement full, t
Length, m	68.0 - 68.6
Breadth, m	13.1 - 13.2
Draught, m	3.78 - 3.96 mean
No of shafts	1
Machinery	1 Ericsson VL, 2 Stimers or Martin boilers
Power, h. p.	320ihp
Max speed, kts	8
Fuel, t	coal 140 - 150
Endurance, nm(kts)
Armour, mm	iron; side: 127 - 76, turret: 254, deck: 38
Armament	1 x 2 - 381/12 long Dahlgren SB
Complement	100

Standard scale images

Graphics

Project history

This class were improved Passaic, with wood and iron upper and iron lower hulls, modified in accordance with war experience. The four ships not commissioned during the war, were built on the Ohio river, three at Cincinnati and Manayunk as far up as South Pittsburgh. The hull lines were improved and designed speed is given as 13 kts but there was no hope of getting near this. Canonicus and later monitors had the 381mm guns longer than in the Passaic class and fired with their muzzles outside the turret.

Ship protection

The 5x25mm side armour was backed by two iron stringers 165mm deep and 152mm thick for 21.3m from the bows, but 102mm elsewhere, and the armour lower edge was 3 x 25mm. The turret, of 6.4m internal diameter, had 10x25mm plates as did the pilot house above, and the funnel base was also armoured. The turret skirt was protected by a 127mm thick 381mm high ring fixed to the deck.

Modernizations

None.

Naval service

Tecumseh was mined in Mobile Bay 5.8.1864. Wyandotte was first commissioned only 24.1.1876, till 1879 served as station ship at Washington, loaned to Naval militia in 1896 but recommissioned to the Navy for Spanish American war 30.4.1898. In September 1898 she was decommissioned and sold in January 1899.