User:Xyl 54/sandbox 15

Sandbox 15

=Page History=

=Completed=
 * TMWNW (draft Aug 20) to William Martin (Royal Marine officer), sept 20

= Electroboat =

Tables

 * Type XXI: Numbers = U-2501-2762, 3001-3288, 3501-3684
 * 'Type XXIII Numbers U-2321-2460, 4701-4891

Electroboats Scuttled
 * Type XXI : 2501-52 = 31: 3001-44 =33: 3501-30 =22: total 96 (ref Blair p815 (App 18)
 * Type XXIII : 2327-71 =22: 4701-3= 3: total =25
 * (Type XVII : 792-5 =4: XVIIB : 1405-6 =2 total 6)

.Electroboats surrendered
 * Type XXI : 2502-, 3008- =12 (ref Blair p818 (App 19)
 * Type XXIII :2321-43 =21

= Walter boats =

Unfinished projects
= Amerikabomber = The Amerikabombers: some comparisons


 * (Copied to Sandbox 13, Jan 2021 for test purposes)

=Test section= Problem affecting edit function (reported to WP:Helpdesk); problem isolated to incomplete markers (viz. <ref ) using Sandbox 13. Other incomplete markers ( [[, ==, # ), no effect. 24 Jan 2021.

=Fishcutter incident= Source: Original report at wlb.stuttgart.de

=Q-ships= Dittmar & Colledge (1972) British Warships 1914-1919 Ian Allan SBN 7110 0380 7

Q-ships p.126

earliest effective anti-submarine measure/ earliest effective attempt to meet the U-boat threat

most difficult problem in ASW at the time was detection;

decoy vessel circumvented that by inviting the U-boat to come to it/Q-ships afforded means to bypass difficulty when few effective means available

aside from decoys, ten trawler/submarine combinations employed

Q-ships most effective for period in 1915; thereafter value declined while usage increased

215 ships employed in role altogether

Breakdown
 * a) merchant conversion ?125
 * b) war construction 1 ([[HMS Hyderabad (1917)
 * c) warships (?76)
 * d) trawler/submarine combination 10

Warships: sloops 6 + 23 escort ship 1 armed boarding vessel 1 messenger boat 2 store carrier 8 yacht 3 tug 1 salvage vessel 1 lighter 1 trawler 18 drifter (sail) 6 motor drifter 5


 * Q-ships at navalhistory.net

=Special Service Vessels= Dittmar & Colledge p.316

Miscellaneous group of small vessels inc. tenders, yachts, ferrys etc


 * a) Tenders 17 (+ 4 individual vessels) listed
 * b) Yachts 5 (inc. Royal Yachts Alexandra Enchantress, Victoria & Albert)
 * c) Ferry service 4
 * d) misc.: gunboats 9
 * . …. " : icebreakers  3

Links: HMY Alexandra (1907), HMY Victoria and Albert (1899), [[HMS Enchantress (1903)


 * Special Service Vessels at navalhistory.net

=Type XVII U-boat= Wa 201


 * }

Wk 202


 * }

Type XVIIB


 * }

Type XVIIG


 * }

Type XVIIE


 * }

Type XVIIK


 * }

=V-300= German submarine V-300/ the V-300 was a was a 300-ton experimental submarine design created to to test the Walter hydrogen peroxide-based turbine propulsion system.

As originally /envisaged by its creator, Hellmut Walter, the V-300 was to have a similar shape to the V-80, / typical Walter boat shape with two turbines producing a total of 4000hp, giving a submerged speed of 25 knots

the detailed design work was done at Krupp’s Germania works in Kiel. The head oof U-boat Dec velopment, Adm. Fuchs, stipulated that there should be no departure from standard and well-tested design principles; as a result, the V-300 design became considerably larger, at 600 tons, with the addition of diesel engines for surface travel and electric motors for silent underwater motion. The design also acquired a conning tower (something Walter had not included) but lacked forward hydroplanes, as Walter believed control surfaces at the stern (as in an aircraft) would be adequate. The resulting design, produced in September 1941, displaced 610 tons on the surface, but was/would be capable of only 19 knots submerged (still over twice as fast as any conventional U-boat, but lower than Walter had envisaged for his high-speed U-boat. As a result, Walter returned to the drawing board and produced a new design, which became the Wa 201 and Wk 202 submarines.< Roessler p.172 Meanwhile Krupp Germania were given a contract to build V-300, designated U-791, but in January 1942 Walter approached Doenitz with his own design, winning approval for their construction, and in June 1942 the contract for V-300 was cancelled.<Roessler p.174

Sources
 * R Chesnau, ed. Conway's All the World's Fighting Ships 1922–1946 (1980) Conway Maritime Press, Greenwich, UK ISBN 0-85177-146-7
 * Axel Niestle : German U-Boat Losses during World War II  (1998). ISBN 1-85367-352-8
 * Eberhard Roessler : The U-Boat: The Evolution and Technical History of German Submarines (1981/2001) Cassel & Co. ISBN 0-304-36120-8

=Raiders=