CMB.10 1916
|
Names |
CMB.1, 2 CMB.3, 7.1918- DCB.3 CMB.4 - 8 CMB.9, 7.1918- DCB.2 CMB.10 - 12 CMB.13, 7.1918- DCB.2 CMB.40, 6.1918- Osea CMB.41 - 61 CMB112 CMB121 - 123 DCB.4 (ex-MB.1143) DCB.5 (ex-MB.1256) |
|
Builders |
Thornycroft, Hampton: CMB.1 - 10, 13, 40 - 42, 47 - 48, 50, 55 - 56, 112, 121 - 123 Tom Bunn, Rotherhithe: CMB.11, 12 Taylor & Bates, Chertsey: CMB.43, 49 J W Brooke, Lowestoft: CMB.44 - 45, 59 Frank Maynard, Chiswick: CMB.46, 53 - 54 Salter Bros, Oxford: CMB.51 - 52, 60 - 61 Wills & Packham, Sittingbourne: CMB.57 - 58 |
|
Completed |
1916: CMB.1 - 13 1918: CMB.40 - 61, DCB.4, 5 1919: CMB.112 1921: CMB.121 - 123 |
|
Losses |
CMB.1 (19.6.1917), CMB.2 (9.7.1918), CMB.5 (1922), CMB.8 (17.9.1917), CMB.10 (7.5.1918), CMB.11 (2.11.1917), Osea (11.8.1918), CMB.41 (1.8.1918, interned), CMB.42 (11.8.1918), CMB.44 (11.8.1918, interned), CMB.47 (11.8.1918), CMB.48 (11.8.1918, interned), CMB.50 (19.7.1918) 16 cancelled 11.1918. (presumably CMB.124 - 139) |
|
Transfers |
Netherlands, 1928: CMB.123 |
|
Discarding |
1920: DCB.2, CMB.53, 60, DCB.4, 5 1921: DCB.3, CMB.4, 7, 45, 46, 51, 52, 54, 56 - 58, 61 1922: CMB.41, 43, 44, 48, 55 1925: CMB.6 1928: CMB.49, 59, 112 1929: CMB.121, 122 1935: DCB.1, CMB.12 |
|
Displacement normal, t |
5 |
|
Displacement full, t |
|
|
Length, m |
13.7 |
|
Breadth, m |
2.59 |
|
Draught, m |
0.82 - 0.92 |
|
No of shafts |
1 |
|
Machinery |
CMB.1 - 13: 1 Thornycroft V-8 or Thornycroft V-12 petrol engine CMB.40 - 61: 1 FIAT petrol engine CMB.112: 1 Thornycroft V-12 petrol engine CMB.121 - 123: 1 Green 12-cyl. petrol engine |
|
Power, h. p. |
CMB.1 - 13: 250 CMB.40 - 61, 112, 121 - 123: 275 |
|
Max speed, kts |
CMB.1 - 13: 24.8 CMB.40 - 61: 35.1 CMB.112: 37.3 CMB.121 - 123: 37.8 |
|
Fuel, t |
petrol |
| Endurance, nm(kts) | |
|
Armament |
(1 - 2) x 2 - 7.7/94, 1 - 450 TT (stern) |
|
Complement |
2 - 3 |
Project history: Twelve were ordered in January 1916 and all were delivered by mid-August 1916, after Thornycroft had submitted designs based on pre-war hydroplanes. The hull was a stepped planing type and the torpedo was launched tail-first over the stern. The original specification called for CMBs (a camouflage designation) to be light enough for hoisting in light cruisers' davits, but only the 'scout' Diamond was used for this purpose.
Modernizations: None
Naval service: CMB.40 became a nominal depot ship and was renamed Osea in June 1918. A further 16 boats of the CMB.121 group were cancelled in November 1918. Five were converted to Distant Controlled Boats (DCBs), including two 40-footers not previously taken into naval service (MB.1143 and MB.1256, which became DCB.4 and DCB.5). The survivors were mostly sunk as targets or sold post-war, only CMB.12 lasting until 1935. CMB.4 was lent to the Imperial War Museum from 1921 to 1928 and then preserved at Hampton, and is now once again in IWM hands at Duxford.
CMB.112 and CMB.98ED
© Ivan Gogin, 2008-13