| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| Hydra | Chatham DYd | 1.1838 | 7.1838 | 11.7.1838 | sold 5.1870 | ||
| Hecla | Chatham DYd | 6.1838 | 14.1.1839 | 28.8.1839 | sold 6.1863 | ||
| Hecate | Chatham DYd | 6.1838 | 30.3.1839 | 7.12.1839 | survey ship 1860 |
|
Displacement normal, t |
1096 |
|
Displacement full, t |
|
|
Length, m |
50.3 pp |
|
Breadth, m |
10.0 |
|
Draught, m |
3.96 |
|
No of shafts |
2 side wheels |
|
Machinery |
sails + boilers, 1 2-cyl side lever engine |
|
Power, h. p. |
Hydra: 220nhp Hecla, Hecate: 240nhp |
|
Max speed, kts |
9 |
|
Fuel, t |
coal |
|
Endurance, nm(kts) |
|
|
Armament |
2 x 1 - 204/13 68pdr 65cwt shell SBML, 2 x 1 - 162/17 32pdr 50cwt SBML |
|
Complement |
135 |
Project history: 2nd rate steam vessels, since 1844 2nd class sloops. Sir William Symonds design, approved in 1837.
Modernizations: None.
Naval service: No significant events.
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