Midland 1942
Buttercup 1942 as minesweeper
Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
Canadian-built, 1939-1940 program | |||||||
Agassiz | K129 | Burrard, Vancouver | 4.1940 | 15.8.1940 | 1.1941 | BU 11.1945 | |
Alberni | K103 | Canadian Yarrow, Esquimalt | 4.1940 | 22.8.1940 | 2.1941 | sunk 21.8.1944 | |
Algoma | K127 | Port Arthur SY | 6.1940 | 17.12.1940 | 7.1941 | to Venezuela 6.1945 (Constitucion) | |
Amherst | K148 | St. John SY | 5.1940 | 4.12.1940 | 8.1941 | BU 11.1945 | |
Arrowhead | K145 | Marine Industries, Sorel | 4/1940 | 8.8.1940 | 11/1940 | to UK 6.1945 | |
Arvida | K113 | Morton, Quebec City | 2.1940 | 21.9.1940 | 5.1941 | sold 1950 | |
Baddeck | K147 | Davie SB, Lauzon | 8.1940 | 20.11.1940 | 5.1941 | sold 1947 | |
Barrie | K138 | Collingwood SY | 4.1940 | 23.11.1940 | 5.1941 | sold 1947 | |
Battleford | K165 | Collingwood SY | 9.1940 | 15.4.1941 | 7.1941 | to Venezuela 1946 (Libertad) | |
Bittersweet | K182 | Marine Industries, Sorel | 4/1940 | 12.9.1940 | 1/1941 | to UK 6.1945 | |
Brandon | K149 | Davie SB, Lauzon | 10.1940 | 29.4.1941 | 7.1941 | BU 10.1945 | |
Buctouche | K179 | Davie SB, Lauzon | 8.1940 | 20.11.1940 | 6.1941 | BU 10.1945 | |
Camrose | K154 | Marine Industries, Sorel | 9.1940 | 16.11.1940 | 6.1941 | BU 1947 | |
Chambly | K116 | Canadian Vickers, Montreal | 2.1940 | 29.7.1940 | 12.1940 | sold 1952 | |
Chicoutimi | K156 | Canadian Vickers, Montreal | 7.1940 | 16.10.1940 | 5.1941 | BU 1946 | |
Chilliwack | K131 | Burrard, Vancouver | 7.1940 | 14.9.1940 | 4.1941 | BU 10.1945 | |
Cobalt | K124 | Port Arthur SY | 4.1940 | 17.8.1940 | 11.1940 | sold 1953 | |
Collingwood | K180 | Collingwood SY | 3.1940 | 27/71940 | 11.1940 | BU 1950 | |
Dawson | K104 | Victoria SY | 9.1940 | 8.2.1941 | 10.1941 | BU 1946 | |
Dauphin | K157 | Canadian Vickers, Montreal | 7.1940 | 24.10.1940 | 5.1941 | sold 1949 | |
Drumheller | K167 | Collingwood SY | 12.1940 | 5.7.1941 | 9.1941 | BU 1949 | |
Dunvegan | K177 | Marine Industries, Sorel | 8.1940 | 11.12.1940 | 9.1941 | to Venezuela 1946 (Independencia) | |
Edmundston | K106 | Canadian Yarrow, Esquimalt | 8.1940 | 22.2.1941 | 10.1941 | sold 1948 | |
Eyebright | K150 | Canadian Vickers, Montreal | 1/1940 | 22.7.1940 | 11/1940 | to UK 6.1945 | |
Fennel | K194 | Marine Industries, Sorel | 1/1940 | 20.8.1940 | 5/1941 | to UK 6.1945 | |
Galt | K163 | Collingwood SY | 5.1940 | 28.12.1940 | 5.1941 | BU 10.1945 | |
Hepatica | K159 | Davie SB, Lauzon | 2/1940 | 6.7.1940 | 5/1941 | to UK 6.1945 | |
Kamloops | K176 | Victoria SY | 4.1940 | 7.8.1940 | 3.1941 | BU 10.1945 | |
Kamsack | K171 | Port Arthur SY | 11.1940 | 5.5.1941 | 10.1941 | to Venezuela 1945 (Carabobo) | |
Kenogami | K125 | Port Arthur SY | 4.1940 | 5.9.1940 | 6.1941 | BU 1.1950 | |
Lethbridge | K160 | Canadian Vickers, Montreal | 8.1940 | 21.11.1940 | 6.1941 | sold 1952 | |
Levis | K115 | G T Davie, Lauzon | 3.1940 | 4.9.1940 | 5.1941 | sunk 19.9.1941 | |
Louisburg | K143 | Morton, Quebec City | 10.1940 | 27.5.1941 | 10.1941 | sunk 6.2.1943 | |
Lunenburg | K151 | G T Davie, Lauzon | 9.1940 | 10.7.1941 | 12.1941 | BU 6.1946 | |
Matapedia | K112 | Morton, Quebec City | 2.1940 | 14.9.1940 | 5.1941 | BU 12.1950 | |
Mayflower | K191 | Canadian Vickers, Montreal | 2/1940 | 3.7.1940 | 5/1941 | to UK 6.1945 | |
Moncton | K139 | St. John SY | 12.1940 | 11.8.1941 | 4.1942 | sold 1955 | |
Moosejaw | K164 | Collingwood SY | 8.1940 | 9.4.1941 | 6.1941 | BU 9.1949 | |
Morden | K170 | Port Arthur SY | 10.1940 | 5.5.1941 | 9.1941 | BU 11.1946 | |
Nanaimo | K101 | Canadian Yarrow, Esquimalt | 4.1940 | 28.10.1940 | 4.1941 | sold 1953 | |
Napanee | K118 | Kingston SY | 3.1940 | 31.8.1940 | 5.1941 | BU 6.1946 | |
Oakville | K178 | Port Arthur SY | 12.1940 | 21.6.1941 | 11.1941 | to Venezuela 1946 (Patria) | |
Orillia | K119 | Collingwood SY | 3.1940 | 15.9.1940 | 11.1940 | BU 1.1951 | |
Pictou | K146 | Davie SB, Lauzon | 7.1940 | 8.10.1940 | 4.1941 | sold 1950 | |
Prescott | K161 | Kingston SY | 1.1940 | 7.1.1941 | 6.1941 | BU 10.1945 | |
Quesnell | K133 | Victoria SY | 5.1940 | 12.11.1940 | 5.1941 | BU 10.1945 | |
Rimouski | K121 | Davie SB, Lauzon | 7.1940 | 3.10.1940 | 4.1941 | BU 12.1950 | |
Rosthern | K169 | Port Arthur SY | 6.1940 | 30.11.1940 | 6.1941 | BU 6.1946 | |
Sackville | K181, 1956- AN113 | St. John SY | 5.1940 | 15.5.1941 | 12.1941 | survey vessel 1952, net/mine layer 1956, stricken 12.1982 | |
Saskatoon | K158 | Canadian Vickers, Montreal | 8/1940 | 6.11.1940 | 6/1941 | sold 1948 | |
Shawinigan | K136 | G T Davie, Lauzon | 6.1940 | 16.5.1941 | 9.1941 | sunk 25.11.1944 | |
Shediac | K110 | Davie SB, Lauzon | 10.1940 | 29.4.1941 | 7.1941 | sold 1954 | |
Sherbrooke | K152 | Marine Industries, Sorel | 8.1940 | 25.10.1940 | 6.1941 | BU 5.1947 | |
Sorel | K153 | Marine Industries, Sorel | 8.1940 | 16.11.1940 | 8.1941 | BU 11.1945 | |
Snowberry | K166 | Davie SB, Lauzon | 2/1940 | 8.8.1940 | 5.1941 | to UK 6.1945 | |
Spikenard | K198 | Davie SB, Lauzon | 2.1940 | 10.8.1940 | 5.1941 | sunk 11.2.1942 | |
Sudbury | K162 | Kingston SY | 1.1941 | 31.5.1941 | 10.1941 | sold 1949 | |
Summerside | K141 | Morton, Quebec City | 10.1940 | 17.5.1941 | 9.1941 | BU 7.1946 | |
The Pas | K168 | Collingwood SY | 1.1941 | 18.8.1941 | 10.1941 | sold 9.1945 | |
Trail | K174 | Burrard, Vancouver | 7.1940 | 17.10.1940 | 4.1941 | BU 8.1950 | |
Trillium | K172 | Canadian Vickers, Montreal | 2/1940 | 26.6.1940 | 10/1940 | to UK 6.1945 | |
Wetaskiwin (ex-Banff) | K175 | Burrard, Vancouver | 4.1940 | 18.7.1940 | 12.1940 | to Venezuela 1946 (Victoria) | |
Weyburn | K173 | Port Arthur SY | 12.1940 | 26.7.1940 | 11.1941 | sunk 22.2.1943 | |
Windflower | K155 | Davie SB, Lauzon | 2.1940 | 4.7.1940 | 5.1941 | collision 7.12.1941 | |
Canadian-built, 1940-1941 program | |||||||
Brantford | K218 | Midland SY | 2.1941 | 6.9.1941 | 5.1942 | sold 1950 | |
Dundas | K229 | Victoria SY | 3.1941 | 25.7.1941 | 4.1942 | BU 10.1945 | |
Midland | K220 | Midland SY | 2.1941 | 25.6.1941 | 11.1941 | BU 11.1945 | |
New Westminster | K228 | Victoria SY | 2.1941 | 14.5.1941 | 1.1942 | sold 1950 | |
Timmins | K223 | Canadian Yarrow, Esquimalt | 12.1940 | 26.6.1941 | 2.1942 | sold 1948 | |
Vancouver (ex-Kitchener) | K240 | Canadian Yarrow, Esquimalt | 6.1941 | 26.8.1941 | 3.1942 | BU 10.1945 | |
Canadian-built, revised 1940-1941 program | |||||||
Calgary | K231 | Marine Industries, Sorel | 3.1941 | 23.8.1941 | 12.1941 | BU 8.1946 | |
Charlottetown | K244 | Kingston SY | 6.1941 | 10.9.1941 | 12.1941 | sunk 11.9.1942 | |
Fredericton | K245 | Marine Industries, Sorel | 3.1941 | 2.9.1941 | 12.1941 | sold 1946 | |
Halifax | K239 | Collingwood SY | 4.1941 | 4.10.1941 | 11.1941 | sold 7.1945 | |
Kitchener (ex-Vancouver) | K225 | G T Davie, Lauzon | 2.1941 | 18.11.1941 | 6.1942 | BU 9.1949 | |
La Malbaie (ex-Fort William) | K273 | Kingston SY | 3.1941 | 25.10.1941 | 4.1942 | BU 10.1945 | |
Port Arthur | K233 | Port Arthur SY | 4.1941 | 18.9.1941 | 5.1942 | sold 10.1945 | |
Regina | K234 | Marine Industries, Sorel | 3.1941 | 14.10.1941 | 1.1942 | sunk 8.8.1944 | |
Ville de Quebec (ex-Quebec) | K242 | Morton, Quebec City | 6.1941 | 12.11.1941 | 5.1942 | sold 1946 | |
Woodstock | K238 | Collingwood SY | 5.1941 | 10.12.1941 | 5.1942 | sold 1951 |
Data variant | as completed |
Displacement standard, t |
950 Calgary, Charlottetown, Fredericton, Halifax, Kitchener, La Malbaie, Port Arthur, Regina, Ville de Quebec, Woodstock: 1015 |
Displacement full, t |
1280 Calgary, Charlottetown, Fredericton, Halifax, Kitchener, La Malbaie, Port Arthur, Regina, Ville de Quebec, Woodstock: 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 |
Breadth, m |
10.1 |
Draught, m |
4.14 - 4.80 deep load |
No of shafts |
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 |
Power, h. p. |
2750 |
Max speed, kts |
16.5 |
Fuel, t |
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) |
Electronic equipment |
type 271 or type 286 (some) radars, type 123 sonar |
Complement |
85 - 109 |
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.
Data variant | Sackville 1956 |
Displacement standard, t |
1085 |
Displacement full, t |
1350 |
Length, m |
62.5 |
Breadth, m |
10.1 |
Draught, m |
4.00 |
No of shafts |
1 |
Machinery |
1 VTE, 2 cylindrical boilers |
Power, h. p. |
2750 |
Max speed, kts |
16.5 |
Fuel, t |
oil 230 |
Endurance, nm(kts) | |
Armament |
mines |
Electronic equipment | |
Complement |
38 |
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).
© Ivan Gogin, 2015