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FIGHTING SHIPS OF THE WORLD
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Flower corvettes (TRILLIUM) (1940-1942)


Ships


Name No Yard No Builder Laid down Launched Comp Fate Modification
Agassiz K129   Burrard, Vancouver 4.1940 15.8.1940 1.1941 BU 11.1945 Canadian-built, 1939-1940 program
Alberni K103   Canadian Yarrow, Esquimalt 4.1940 22.8.1940 2.1941 sunk 21.8.1944 Canadian-built, 1939-1940 program
Algoma K127   Port Arthur SY 6.1940 17.12.1940 7.1941 to Venezuela 6.1945 (Constitucion) Canadian-built, 1939-1940 program
Amherst K148   St. John SY 5.1940 4.12.1940 8.1941 BU 11.1945 Canadian-built, 1939-1940 program
Arrowhead K145   Marine Industries, Sorel 4/1940 8.8.1940 11/1940 to UK 6.1945 Canadian-built, 1939-1940 program
Arvida K113   Morton, Quebec City 2.1940 21.9.1940 5.1941 sold 1950 Canadian-built, 1939-1940 program
Baddeck K147   Davie SB, Lauzon 8.1940 20.11.1940 5.1941 sold 1947 Canadian-built, 1939-1940 program
Barrie K138   Collingwood SY 4.1940 23.11.1940 5.1941 sold 1947 Canadian-built, 1939-1940 program
Battleford K165   Collingwood SY 9.1940 15.4.1941 7.1941 to Venezuela 1946 (Libertad) Canadian-built, 1939-1940 program
Bittersweet K182   Marine Industries, Sorel 4/1940 12.9.1940 1/1941 to UK 6.1945 Canadian-built, 1939-1940 program
Brandon K149   Davie SB, Lauzon 10.1940 29.4.1941 7.1941 BU 10.1945 Canadian-built, 1939-1940 program
Buctouche K179   Davie SB, Lauzon 8.1940 20.11.1940 6.1941 BU 10.1945 Canadian-built, 1939-1940 program
Camrose K154   Marine Industries, Sorel 9.1940 16.11.1940 6.1941 BU 1947 Canadian-built, 1939-1940 program
Chambly K116   Canadian Vickers, Montreal 2.1940 29.7.1940 12.1940 sold 1952 Canadian-built, 1939-1940 program
Chicoutimi K156   Canadian Vickers, Montreal 7.1940 16.10.1940 5.1941 BU 1946 Canadian-built, 1939-1940 program
Chilliwack K131   Burrard, Vancouver 7.1940 14.9.1940 4.1941 BU 10.1945 Canadian-built, 1939-1940 program
Cobalt K124   Port Arthur SY 4.1940 17.8.1940 11.1940 sold 1953 Canadian-built, 1939-1940 program
Collingwood K180   Collingwood SY 3.1940 27/71940 11.1940 BU 1950 Canadian-built, 1939-1940 program
Dawson K104   Victoria SY 9.1940 8.2.1941 10.1941 BU 1946 Canadian-built, 1939-1940 program
Dauphin K157   Canadian Vickers, Montreal 7.1940 24.10.1940 5.1941 sold 1949 Canadian-built, 1939-1940 program
Drumheller K167   Collingwood SY 12.1940 5.7.1941 9.1941 BU 1949 Canadian-built, 1939-1940 program
Dunvegan K177   Marine Industries, Sorel 8.1940 11.12.1940 9.1941 to Venezuela 1946 (Independencia) Canadian-built, 1939-1940 program
Edmundston K106   Canadian Yarrow, Esquimalt 8.1940 22.2.1941 10.1941 sold 1948 Canadian-built, 1939-1940 program
Eyebright K150   Canadian Vickers, Montreal 1/1940 22.7.1940 11/1940 to UK 6.1945 Canadian-built, 1939-1940 program
Fennel K194   Marine Industries, Sorel 1/1940 20.8.1940 5/1941 to UK 6.1945 Canadian-built, 1939-1940 program
Galt K163   Collingwood SY 5.1940 28.12.1940 5.1941 BU 10.1945 Canadian-built, 1939-1940 program
Hepatica K159   Davie SB, Lauzon 2/1940 6.7.1940 5/1941 to UK 6.1945 Canadian-built, 1939-1940 program
Kamloops K176   Victoria SY 4.1940 7.8.1940 3.1941 BU 10.1945 Canadian-built, 1939-1940 program
Kamsack K171   Port Arthur SY 11.1940 5.5.1941 10.1941 to Venezuela 1945 (Carabobo) Canadian-built, 1939-1940 program
Kenogami K125   Port Arthur SY 4.1940 5.9.1940 6.1941 BU 1.1950 Canadian-built, 1939-1940 program
Lethbridge K160   Canadian Vickers, Montreal 8.1940 21.11.1940 6.1941 sold 1952 Canadian-built, 1939-1940 program
Levis K115   G T Davie, Lauzon 3.1940 4.9.1940 5.1941 sunk 19.9.1941 Canadian-built, 1939-1940 program
Louisburg K143   Morton, Quebec City 10.1940 27.5.1941 10.1941 sunk 6.2.1943 Canadian-built, 1939-1940 program
Lunenburg K151   G T Davie, Lauzon 9.1940 10.7.1941 12.1941 BU 6.1946 Canadian-built, 1939-1940 program
Matapedia K112   Morton, Quebec City 2.1940 14.9.1940 5.1941 BU 12.1950 Canadian-built, 1939-1940 program
Mayflower K191   Canadian Vickers, Montreal 2/1940 3.7.1940 5/1941 to UK 6.1945 Canadian-built, 1939-1940 program
Moncton K139   St. John SY 12.1940 11.8.1941 4.1942 sold 1955 Canadian-built, 1939-1940 program
Moosejaw K164   Collingwood SY 8.1940 9.4.1941 6.1941 BU 9.1949 Canadian-built, 1939-1940 program
Morden K170   Port Arthur SY 10.1940 5.5.1941 9.1941 BU 11.1946 Canadian-built, 1939-1940 program
Nanaimo K101   Canadian Yarrow, Esquimalt 4.1940 28.10.1940 4.1941 sold 1953 Canadian-built, 1939-1940 program
Napanee K118   Kingston SY 3.1940 31.8.1940 5.1941 BU 6.1946 Canadian-built, 1939-1940 program
Oakville K178   Port Arthur SY 12.1940 21.6.1941 11.1941 to Venezuela 1946 (Patria) Canadian-built, 1939-1940 program
Orillia K119   Collingwood SY 3.1940 15.9.1940 11.1940 BU 1.1951 Canadian-built, 1939-1940 program
Pictou K146   Davie SB, Lauzon 7.1940 8.10.1940 4.1941 sold 1950 Canadian-built, 1939-1940 program
Prescott K161   Kingston SY 1.1940 7.1.1941 6.1941 BU 10.1945 Canadian-built, 1939-1940 program
Quesnell K133   Victoria SY 5.1940 12.11.1940 5.1941 BU 10.1945 Canadian-built, 1939-1940 program
Rimouski K121   Davie SB, Lauzon 7.1940 3.10.1940 4.1941 BU 12.1950 Canadian-built, 1939-1940 program
Rosthern K169   Port Arthur SY 6.1940 30.11.1940 6.1941 BU 6.1946 Canadian-built, 1939-1940 program
Sackville K181, 1956- AN113   St. John SY 5.1940 15.5.1941 12.1941 survey vessel 1952, net/mine layer 1956, stricken 12.1982 Canadian-built, 1939-1940 program
Saskatoon K158   Canadian Vickers, Montreal 8/1940 6.11.1940 6/1941 sold 1948 Canadian-built, 1939-1940 program
Shawinigan K136   G T Davie, Lauzon 6.1940 16.5.1941 9.1941 sunk 25.11.1944 Canadian-built, 1939-1940 program
Shediac K110   Davie SB, Lauzon 10.1940 29.4.1941 7.1941 sold 1954 Canadian-built, 1939-1940 program
Sherbrooke K152   Marine Industries, Sorel 8.1940 25.10.1940 6.1941 BU 5.1947 Canadian-built, 1939-1940 program
Sorel K153   Marine Industries, Sorel 8.1940 16.11.1940 8.1941 BU 11.1945 Canadian-built, 1939-1940 program
Snowberry K166   Davie SB, Lauzon 2/1940 8.8.1940 5.1941 to UK 6.1945 Canadian-built, 1939-1940 program
Spikenard K198   Davie SB, Lauzon 2.1940 10.8.1940 5.1941 sunk 11.2.1942 Canadian-built, 1939-1940 program
Sudbury K162   Kingston SY 1.1941 31.5.1941 10.1941 sold 1949 Canadian-built, 1939-1940 program
Summerside K141   Morton, Quebec City 10.1940 17.5.1941 9.1941 BU 7.1946 Canadian-built, 1939-1940 program
The Pas K168   Collingwood SY 1.1941 18.8.1941 10.1941 sold 9.1945 Canadian-built, 1939-1940 program
Trail K174   Burrard, Vancouver 7.1940 17.10.1940 4.1941 BU 8.1950 Canadian-built, 1939-1940 program
Trillium K172   Canadian Vickers, Montreal 2/1940 26.6.1940 10/1940 to UK 6.1945 Canadian-built, 1939-1940 program
Wetaskiwin (ex-Banff) K175   Burrard, Vancouver 4.1940 18.7.1940 12.1940 to Venezuela 1946 (Victoria) Canadian-built, 1939-1940 program
Weyburn K173   Port Arthur SY 12.1940 26.7.1940 11.1941 sunk 22.2.1943 Canadian-built, 1939-1940 program
Windflower K155   Davie SB, Lauzon 2.1940 4.7.1940 5.1941 collision 7.12.1941 Canadian-built, 1939-1940 program
Brantford K218   Midland SY 2.1941 6.9.1941 5.1942 sold 1950 Canadian-built, 1940-1941 program
Dundas K229   Victoria SY 3.1941 25.7.1941 4.1942 BU 10.1945 Canadian-built, 1940-1941 program
Midland K220   Midland SY 2.1941 25.6.1941 11.1941 BU 11.1945 Canadian-built, 1940-1941 program
New Westminster K228   Victoria SY 2.1941 14.5.1941 1.1942 sold 1950 Canadian-built, 1940-1941 program
Timmins K223   Canadian Yarrow, Esquimalt 12.1940 26.6.1941 2.1942 sold 1948 Canadian-built, 1940-1941 program
Vancouver (ex-Kitchener) K240   Canadian Yarrow, Esquimalt 6.1941 26.8.1941 3.1942 BU 10.1945 Canadian-built, 1940-1941 program
Calgary K231   Marine Industries, Sorel 3.1941 23.8.1941 12.1941 BU 8.1946 Canadian-built, revised 1940-1941 program
Charlottetown K244   Kingston SY 6.1941 10.9.1941 12.1941 sunk 11.9.1942 Canadian-built, revised 1940-1941 program
Fredericton K245   Marine Industries, Sorel 3.1941 2.9.1941 12.1941 sold 1946 Canadian-built, revised 1940-1941 program
Halifax K239   Collingwood SY 4.1941 4.10.1941 11.1941 sold 7.1945 Canadian-built, revised 1940-1941 program
Kitchener (ex-Vancouver) K225   G T Davie, Lauzon 2.1941 18.11.1941 6.1942 BU 9.1949 Canadian-built, revised 1940-1941 program
La Malbaie (ex-Fort William) K273   Kingston SY 3.1941 25.10.1941 4.1942 BU 10.1945 Canadian-built, revised 1940-1941 program
Port Arthur K233   Port Arthur SY 4.1941 18.9.1941 5.1942 sold 10.1945 Canadian-built, revised 1940-1941 program
Regina K234   Marine Industries, Sorel 3.1941 14.10.1941 1.1942 sunk 8.8.1944 Canadian-built, revised 1940-1941 program
Ville de Quebec (ex-Quebec) K242   Morton, Quebec City 6.1941 12.11.1941 5.1942 sold 1946 Canadian-built, revised 1940-1941 program
Woodstock K238   Collingwood SY 5.1941 10.12.1941 5.1942 sold 1951 Canadian-built, revised 1940-1941 program


Technical data


Data variantas completed Sackville 1956
Displacement standard, t

950

Calgary, Charlottetown, Fredericton, Halifax, Kitchener, La Malbaie, Port Arthur, Regina, Ville de Quebec, Woodstock: 1015

1085

Displacement full, t

1280

Calgary, Charlottetown, Fredericton, Halifax, Kitchener, La Malbaie, Port Arthur, Regina, Ville de Quebec, Woodstock: 1350

1350

Length, m

57.9 pp 62.5 oa

Calgary, Charlottetown, Fredericton, Halifax, Kitchener, La Malbaie, Port Arthur, Regina, Ville de Quebec, Woodstock: 63.5 oa

62.5

Breadth, m

10.1

10.1

Draught, m

4.14 - 4.80 deep load

4.00

No of shafts

1

1

Machinery

1 VTE, 2 cylindrical boilers

Calgary, Charlottetown, Fredericton, Halifax, Kitchener, La Malbaie, Port Arthur, Regina, Ville de Quebec, Woodstock, Brentford, Midland, New Westminster, Timmins, Vancouver: 1 VTE, 2 Admiralty 3-drum boilers

1 VTE, 2 cylindrical boilers

Power, h. p.

2750

2750

Max speed, kts

16.5

16.5

Fuel, t

oil 230

oil 230

Endurance, nm(kts)

3500(12)

 
Armament

Brantford, Calgary, Charlottetown, Dundas, Fredericton, Halifax, Kitchener, La Malbaie, Midland, New Westminster, Port Arthur, Regina, Timmins, Vancouver, Ville de Quebec, Woodstock: 1 x 1 - 102/45 BL Mk IX, 1 x 1 - 40/39 2pdr QF Mk VIII, 2 x 1 - 20/70 Oerlikon Mk II/IV, 1 x 24 - 178 Hedgehog ASWRL, 4 DCT, 2 DCR (70)

Agassiz, Alberni, Algoma, Amherst, Arvida, Arrowhead, Baddeck, Barrie, Battleford, Bittersweet, Brandon, Buctouche, Camrose, Chambly, Chicoutimi, Chilliwack, Cobalt, Collingwood, Dauphin, Dawson, Drumheller, Dunvegan, Edmundston, Eyebright, Fennel, Galt, Hepatica, Kamloops, Kamsack, Kenogami, Lethbridge, Levis, Louisburg, Lunenburg, Matapedia, Mayflower, Moncton, Moose Jaw, Morden, Nanaimo, Napanee, Oakville, Orillia, Pictou, Prescott, Quesnell, Rimouski, Rosthern, Sackville, Saskatoon, Shawinigan, Shediac, Sherbrooke, Snowberry, Sorel, Spikenard, Sudbury, Summerside, The Pas, Trail, Trillium, Wetaskiwin, Weyburn, Windflower: 1 x 1 - 102/45 BL Mk IX, 2 x 2 - 12.7/62, 2 DCT, 2 DCR (40)

mines

Electronic equipment

type 271 or type 286 (some) radars, type 123 sonar

 
Complement

85 - 109

38



Project history

The ships, played a huge role in battle for Atlantic and become for Englishmen on of the symbols of a victory. Early 1939 Admiralty formulated requirements to new patrol ship for operations in a coastal area. Anti-submarine protection of merchant shipping should become her basic task, so new ship had to had powerful anti-submarine armament and 16-17kts speed, not yielding to surface speed of submarines. From several design one, created on Smith's Dock`s Ltd South Bank in Middlesborough, has been chosen. It was created on the basis of 160ft whaler Southern Pride, built on the same yard. As the order for the new patrol ships was from beginning supposed to be placed on the yards which do not have experience of naval shipbuilding and not familiar with Admiralty standards, the design was made according to standards of merchant shipbuilding more habitual for builders (Lloyd register standards). Machinery with the same purpose have chosen enough conservative: well familiar to reservists triple expansion engine which without changes have borrowed at a prototype. The steam was produced by single-side fire-tube boilers of so-called "Scottish" type. Perhaps, transition to oil-firing became a unique innovation. The hull of the patrol ship, in comparison with a prototype, have extended on 30ft for propulsion improvement. Simultaneously it allowed to increase number of watertight compartments and additional internal volume can be used for placing of magazines and increased crew. They were re-classified from patrols to corvettes just before lead ship was laid down. The 1939 program provided building of 56 ships, as names of flowers were used, and all series has received non-proprietary name "Flower". The beginning of war has led to order increase: under "War Emergency program" have built 50, and under the 1940 program 25 more ships. Besides, Royal Navy has replenished with three corvettes of this class ordered by France and requisitioned 1.7.1940; the fourth ship La Bastiaise was lost on a mine 22.6.1940 during sea trials, formally being still the property of the builder. Seven early-built ships have received minesweeping equipment. Trials of a lead corvette in April, 1940 have opened both strong, and weaknesses of "Flower" class. The ship differed phenomenal manoeuvrability: tactical diameter on full speed was about two hull lengths at only 3° list. At the same time it became clear, that her seaworthiness is insufficient for operations in the high sea: on a wave crew very quickly were seasick, and because of a short forecastle a deck around a superstructure strongly sloshed. With last lack they have consulted, significantly having prolonged a forecastle towards a stern. Besides protection against waves, it has increased the covered volume of the hull which used for placing increased more than in one and a half time, in comparison with the original design, crew (from 50 to 85 men). A forecastle have extended by all incomplete ships which degree of readiness supposed it (part of "War Emergency program" ships and the majority of the 1941 program). Canada also built "Flowers". At first Royal Navy has ordered 10 ships, however they were transferred to Canada before completion. Canadians built for themselves 70 more corvettes, the majority from which was extra equipped with the minesweeping equipment.

Modernizations

1943 - 1945, all survived ships: had light AA armament consisted of (1 x 1 - 40/39 2pdr QF Mk VIII, 2 x 1 - 20/70 Oerlikon Mk II/IV) or (1 x 1 - 40/39 2pdr QF Mk VIII, 4 x 1 - 20/70 Oerlikon Mk II/IV) or 3 x 1 - 20/70 Oerlikon Mk II/IV or 4 x 1 - 20/70 Oerlikon Mk II/IV or (2 x 2 - 20/70 Oerlikon Mk II/IV, 2 x 1 - 20/70 Oerlikon Mk II/IV). ASW armament consisted of 1 x 24 - 178 Hedgehog ASWRL (on some ships), 4 DCT and 2 DCR (up to 72 DC)

1956, Sackville was converted to controlled minelayer, as given in the table.

Naval service

Submarines sunk Levis (German submarines U74 and U552 19.9.1941), Charlottetown (U517 11.9.1942), Shawinigan (U1228 25.11.1944). On mines were lost Weyburn (22.2.1943), Regina (8.8.1944 or sunk by German submarine U667) and Albernie (21.8.1944). Was sunk by aircraft Louisburg (Italian air torpedo 16.2.1943).