A fact from R23X-class airship appeared on Wikipedia's Main Page in the Did you know column on 21 March 2009 (check views). The text of the entry was as follows:
Did you know... that R29, an R23X class airship, recorded the only success by any British wartime rigid airship when she took part in the sinking of German submarine UB-115 in 1918?
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RNAS was merged with the Royal Flying Corps to form the Royal Air Force on 1 April 1918, so I suspect we should list this craft as being RAF for some of exstence, includign the period when it successfully sank the u-boat. Certainly I found good evidence that Major G. M. Thomas was an RAF officer by that time. David Underdown (talk) 13:07, 18 March 2009 (UTC)[reply]
British rigid airships were designated in two fashions. The first had the airship number with a lower case "r" appended to designate a rigid design. This persisted through HMA NO. 25r including two, NO. 14r and 15r which were cancelled. The second nomenclature system applied to all rigid airships from R.26 through R.102. This system had the capital letter R followed by a period and then the sequential number of the airship. The numerals were sequential but there were many which were never more than design designations if at all. Others such as R.41 were contracted for but never finished or In one case (R.81) the contract was never signed. The two major gaps 41 through 79, and 82 through 99 are essentially unexplained. The last R.102 was begun at Cardington but abandoned after the crash of R.101. See: Cis Mowthorp, “Battlebags British Airships of the First World War” pages 157-158.
Mark Lincoln (talk) 16:10, 6 September 2020 (UTC)[reply]