Design
The ''Alarm'' class was designed by Sir William White in 1889 as an enlarged version of his previous ''Sharpshooter'' class. They had a length overall of , a beam of and a displacement of 810 tons. They were engined with two sets of vertical triple-expansion steam engines, two locomotive-type boilers, and twin screws. This layout produced , giving them a speed of with forced draught. They carried between 100 and 160 tons of coal and were manned by 91 sailors and officers.Thornycroft Special - HMS ''Speedy''
While officially classed with the ''Alarm'' class, the ''Speedy'' was actually a separate design. The Naval Defence Act of 1889 authorised the purchase of an ''Alarm''-class torpedo gunboat built to a design by John I. Thornycroft & Company and built in their yard atArmament
At build the class was fitted with two QF /45-pounder guns, four 3-pounder guns and one Gardner machine gun. Five torpedo tubes were fitted in the first five vessels, but this was changed to three 18-inch (450mm) torpedo tubes in the rest of the class. They were arranged as a pair of revolving deck mounts, a pair of fixed deck mounts (deleted in the later vessels) and a single bow-mounted tube; three reloads were provided.Ships
See also
References
* {{DEFAULTSORT:Alarm class torpedo gunboat Ship classes of the Royal Navy Torpedo gunboat classes A