Ôîðóì » Âòîðàÿ ìèðîâàÿ âîéíà » Some questions on British sub fleet in WWII » Îòâåòèòü
Some questions on British sub fleet in WWII
Bruno Lotse: Gentlemen, First of all - Happy New Year! Both the new New Year and the Russian Old New Year! :D :D :D Gentlemen, may I ask you help me with information about WWII British submarine fleet (wow!!! Irony, right? ). What specifically I am looking for is radar equipment installed on British subs like Class U/V, S, T. From various sources including excellent wunderwaffe site ( http://www.wunderwaffe.narod.ru/WeaponBook/U_V/ ) I’ve learned that British subs Class U/V were equipped with radar Type 291 and Type 253. According to this site http://www.navweaps.com/Weapons/WNBR_Radar.htm Type 291 was only an Air warning system. Here comes my first question - did Class U/V sub radars had Surface targets warning capabilities? In the source on wunderwaffe the author Mr. S. Tytushkin mentions radar Type 253. What the hell of the type is that? Do you have any info on Type 253 radar? Mr. S.Tytushkin also mentions 6) ÃÀÑ ìîäåëè «Ò-129». (http://www.wunderwaffe.na....ru/WeaponBook/U_V/02.htm ) What is that? Gentlemen, do you have any info when British coastal subs like Class U/V were equipped with radars - in 1942, 1943, earlier or later on in the war? Finally, I’d like to know whether British subs had radar detectors (ESM) - something on par with German Metox/Mucke/Naxos/Wanze? Cheers, Bruno Lotse
Îòâåòîâ - 2
Hai Chi: Hello, dear Bruno Lotze! 1) The radar Type 291 was not only an Air warning system, but it had small capability a Surface warning too. The radar Type 291 used on a small number of UK submarines in 1942-1943. Especially for submarines was designed radar Type 291W, with a rotating aerial designed for watertightness under great pressure. Radar Type 291W was standart type combinied air and surface warning RDF for all British submarines in WWII since 1942-1943. P-band (1.4 m). Range, with the antenna at 30ft (4ft) was 5.5 nm (2 nm) on a battleship, 3.5 (1) on a destroyer, 2 (0.5) on a submarine, 30 (17) on an airplane at 10,000 ft, 25 (12) on one at 5000 ft and 15 (4) on one at 1000 ft. Accuracies were 100 yd for range and 3 deg for bearing. Paul Akermann says about the radar Type 291W: «If working properly, RDF could thus be used to detect ships at night, or distant aircraft - but this equipment lacked reability, and only too frequently, after a sharp-eyed lookout had already been observing a target for a good while the Radar operator would report having detected an object». Since end 1944 instead the Type 291W RDF was introduced the new radar Type 267W with improved surface search capabilites. It was a dual-frequency (P-band and X-band) submarine RDF, effectictively a combination of the RDF Types 291W and 268W (Type 268W was 3 cm surface search and navigation radar developed in 1944 in Canada with a small cheese aerial). In the Type 267W the P-band dipoles (Type 291W) scanning at 5 rpm, were used for air search, while the X-band cheese (Type 268W), scanning at 5 or 10 rpm, searched for surface targets. The Type 291 aerial arranged forward and the Type 268W aerial aft of the periscopes. With the submarine on the surface/submerged, the Type 267MW (a slightly improved Type 267W) could detect a large ship at over 30.000/15.000 yd and a small ship at over 20.000/11.000 yd. Aircraft detection perfomances were identical to the Type 291W. Accuracies the Type 267MW were 100 yd for range and 0.5 deg for bearing. The Type 253 was IFF A-band a shipborne transponder. See http://webhome.idirect.com/~jproc/sari/sariff.html As far as I know, British subs had radar detectors at end WWII. 2) The Asdic Type 129 (and the Type 129AR) was standart type keel sonar for the most part of new British submarines completed since 1940 (the Type 129 introduced in 1937). Usually the Asdic Type 129 supplemented passive hydrophones Type 709 or 710. Part submarines had the Asdic Type 138 or 138B. The Asdics Type 129 and 138 had a maximum range of 10 nm when used for underwater intercommunication and listening.
Bruno Lotse: Thank you very much, dear ìè÷ìàíú Hai Chi, for the most detailed and to the point information. The reason I was asking simple - on the www.subsim.com we are trying to build a fleet of Royal Navy submarines but came across the question of their radar capabilities. The irony of this British guys could not provide the answer. Oh! I knew whom to ask about British sub!!! Thank you very much again. Cheers, Bruno Lotse
ïîëíàÿ âåðñèÿ ñòðàíèöû