The Apollo-class cruisers were enlarged versions of the preceding . Rainbow displaced 3600LT, which made the ship heavier than some of her sister ships. This was due to being among the ten vessels in the class sheathed in wood and copper for tropical service. This added 200LT to their displacement. The Apollo-class cruisers were 300feet long between perpendiculars and 314feet overall. Sheathed vessels had a beam of 43inchesft8inchesin (ftin) and a draught of 18feet. The cruisers were propelled by a two shaft, two-cylinder triple expansion engine powered by steam from three double-ended and two single-ended boilers creating 7000ihp at natural draught and 9000ihp at forced draught. This gave the cruisers a maximum speed of 18.5kn at natural draught and at forced draught. The Apollo class carried 535LT of coal for fuel. With full bunkers of coal, the cruisers had a range of 8000nmi at .[1]
Rainbows main armament was two single-mounted QF 6adj=onNaNadj=on guns placed along the centreline of the forecastle and poop deck. This was augmented by six QF 4.7adj=onNaNadj=on guns placed three on each side of the upper deck amidships. The secondary armament of eight QF 6-pounder (57 mm) guns were all situated on the upper deck with four placed between the 4.7-inch guns amidships, two placed forward and aft firing through embrasured ports. The cruisers were also fitted with four 14inches torpedo tubes, of which three were installed on the upper deck, two broadside abreast the mainmast and one in the bow. The fourth torpedo tube was situated in the stern on the main deck. The Apollo class had a NaNadj=onNaNadj=on armoured deck where flat and 2inches armoured deck where sloped. The cruisers had a 5adj=onNaNadj=on armoured glacis over the hatch where the engine cylinders projected above the deck. The conning tower had 3inches of armour and the gun shields NaNinches.[1]
Rainbow was ordered as part of the Naval Defence Act of 1889. The vessel's keel was laid down by Palmers at Hebburn-On-Tyne in England on 30 December 1889.[2] The cruiser was launched on 25 March 1891 and entered service in 1892, completing in January 1893.[1] [2]
Rainbow served on the China Station in Hong Kong from 1895 to 1898 and in Malta from 1898 to 1899. She had an operating cost that was deemed excessive and between 1900 and 1909, saw very little service. Most of her operations at this time were closer to England. On 17 December 1901 she was commissioned at Devonport by Captain Thomas Young Greet for service in the cruiser squadron as an additional ship in home waters.[3] She arrived back at Devonport from a tour of the Mediterranean with the squadron in April 1902,[4] and took part in the fleet review held at Spithead on 16 August 1902 for the coronation of King Edward VII.[5] Captain Charles Delabere Granville was appointed in command on 20 August 1902,[6] and visited Souda Bay, Crete, with other ships of the squadron for combined manoeuvres the following month.[7] In October 1902 she was ordered back to Devonport for a refit,[8] and late that year she was again back for temporary service in the Mediterranean to protect British interests in Morocco.[9] During the following years, she saw a severe reduction in fleet support due to her high operating cost, resulting in only minor modernization. Her crew rotation at this time was used as a training cycle. In 1904, the cruiser was restricted to harbour duty.[2] In early 1909, the Admiralty ordered her decommissioned and placed on the inactive list.
Rainbow was presented to Canada in 1910, and was recommissioned HMCS Rainbow on 4 August. She and were purchased from the Admiralty to be used as training ships at Royal Naval College of Canada in Halifax, Nova Scotia.[10] [11] During discussions on the type of cruisers to be sent to Canada, the Admiralty believed that the Apollo-class cruiser was the right choice.[12] Canada paid $225,000 to acquire Rainbow, using outstanding money from the Marine and Fisheries Department.[13] Before departing Great Britain, the ships required alterations to make them suitable for training. This required new heating systems, an up-to-date galley, the latest in Marconi wireless, the enlargement of the cadet gunroom and principal messes and the removal of the obsolete secondary armament.[11]
After commissioning, Rainbow was assigned to the west coast of Canada and was the first Canadian ship to sail around South America by the Strait of Magellan.[11] After a 12-week passage of over the cruiser arrived at Esquimalt, British Columbia on 7 November 1910.[14] However, after commissioning, the status of the Canadian vessels and their ability to operate without direction from the Admiralty kept the new ships within coastal waters. This limited Rainbow to fisheries patrols until the matter was settled.[15] In 1911, the cruiser had her 6-pounder guns removed and replaced with QF 12-pounder 12 cwt naval guns.[16] Her service was quiet on the west coast, performing ceremonial duties,[17] training and coastal fisheries patrol, notably apprehending the American fishing schooner Edrie in February 1913 for illegal fishing.[18] When Niobe was laid up in 1913, her crew was sent west to fill out Rainbows complement.[19]
In July 1914, Rainbow was called to Vancouver to assist with an international incident that was unfolding. Komagata Maru, a Japanese merchant ship filled with Sikh immigrants from India, challenged Canada's immigration law, designed to prevent immigration from South Asia. The ship's passengers were not permitted to disembark even though they were British subjects and the ship had sat in Vancouver harbour for two months.[20] [21] After the local authorities were rebuffed in their attempts to make the ship leave, Rainbow was ordered to intervene. After some discussion with the passengers, who had taken over the vessel, those aboard Komagata Maru agreed to leave Vancouver only when supplies for the ship were provided.[20] Komagata Maru sailed from Vancouver on 23 July, escorted by Rainbow.[21] Twenty of the passengers were killed upon returning to Budge Budge, India, after they resisted an attempt to forcibly return them to Punjab.[22]
When the First World War broke out, Rainbow was sent to cover the withdrawal of the British sloops, and, which had been engaged protecting British citizens during civil unrest in Mexico.[23] She was the largest armed ship the Allies had at the time in the western Pacific Ocean and was ordered to find and engage ships of the Imperial German Navy in the Pacific Ocean; in particular the light cruisers and . Rainbow never met either of these ships, although she missed Leipzig by only a day at San Francisco.[24] The vessel remained the only source of protection for shipping in western North America until the arrival of the Japanese armoured cruiser .[25] Following the destruction of the German Pacific Fleet at the Battle of the Falkland Islands in December 1914, the greatest threat to shipping in Pacific was considered to be armed German raiders and Rainbow was considered to be a match for all but the fastest.[26] However, in 1915, her patrols were shortened due to the lack of a collier to refuel Rainbow while out on patrol.[27]
In early 1916, Rainbow was still patrolling the west coast of North America, performing reconnaissance on German shipping. On 23 April 1916, she seized the German-owned but American-flagged schooner Oregon and then followed that up by seizing the Mexican-flagged schooner Leonor on 2 May.[28] [29] The cruiser returned to Esquimalt with the prizes in tow on 30 May.[29] In 1916 and early 1917, Rainbow was used to transport $140,000,000 in Russian gold bullion (valued in 1917 Canadian dollars), between Esquimalt and Vancouver.[30] This money was placed in trust with Canada by the Russian government for protection due to the impending Russian revolution.
The Royal Canadian Navy found that the cost of operating Rainbow was using up too much of the West Coast naval operations budget, and the crew of Rainbow were sorely needed on the Atlantic coast for the fight against the U-boats. Rainbow was decommissioned and deactivated on 8 May 1917, her crew sent east. On 5 July she was recommissioned in Esquimalt as a depot ship. She served in this capacity until 1 June 1920, when she was sold for scrap to a Seattle shipbroker.[17]
The ship's wheel is on display at the Canadian War Museum in Ottawa.[31]