| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| Hermes | Portsmouth DYd | 4.1834 | 25.6.1835 | 25.11.1835 | sold 10.1864 | ||
| Volcano | Portsmouth DYd | 7.1835 | 30.6.1836 | 17.1.1837 | depot ship 1854 | ||
| Megaera | Sheerness DYd | 8.1836 | 17.8.1837 | 30.3.1838 | wrecked 4.3.1843 | ||
| Acheron | Sheerness DYd | 10.1837 | 23.8.1838 | 8.1.1839 | survey ship 1847 |
|
Displacement normal, t |
1006 |
|
Displacement full, t |
|
|
Length, m |
45.7 pp |
|
Breadth, m |
9.98 |
|
Draught, m |
3.66 |
|
No of shafts |
2 side wheels |
|
Machinery |
sails + boilers, 1 2-cyl side lever engine |
|
Power, h. p. |
Hermes, Volcano, Megaera: 140nhp Acheron: 160nhp |
|
Max speed, kts |
|
|
Fuel, t |
coal |
|
Endurance, nm(kts) |
|
|
Armament |
2 x 1 - 107/16 9pdr 13.5cwt brass SBML |
|
Complement |
135 |
Project history: Steam vessels (SV3), since 1844 2nd class sloop. Symonds specification but John Edye design, approved in 1834.
Modernizations: 1842, Hermes: was lengthened (828bm, 51.8m pp)
1842-1843, all: were armed with 1 x 1 - 204/12 8'' 52cwt shell SBML, 2 x 1 - 159/8 32pdr 17cwt SBML carronades
Naval service: No significant events.
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