Alert and Torch were constructed of steel to a design by William White, the Royal NavyDirector of Naval Construction.[2] They were powered by a three-cylinder vertical triple-expansion steam engine developing 1,400 horsepower (1,000 kW) and driving a single screw.[2]
Sail plan
The class was originally designed and built with barque-rigged sails, but both ships were re-rigged as barquentines before 1900 by removing the main yards.
Armament
Both ships of the class were armed with six 4-inch and four 3-pounder guns, and three machine guns.[1]
Torch joined the Australian Station in February 1897, serving in New Zealand waters in 1898 and 1899.[6] After a refit, she recommissioned at Sydney on 29 November 1913, and in August 1914 became part of the New Zealand Division of the Eastern Fleet. On 16 August 1917 she was transferred to the New Zealand Government as the Training Ship Firebrand.[5] She was sold, renamed Rama and fitted out as a refrigerated ship for the Chatham Islands fishing trade. While approaching the Chatham Islands on 17 November 1924 she struck an uncharted rock, and was beached and abandoned.[6]