`  :::::Quite so. Though not always reliable, the WP entries for tailless aircraft and the delta wing both acknowledge the Vulcan as a ``tailed delta``. Perhaps entirely reliable is the testimony of Mr JAR Kay MRAeS, a director of A V Roe who wrote in 1955, ``The concern of this article, however, is the choice of the tailless delta for a high altitude bomber, the Avro Vulcan.`` (Reproduced Laming p 14.) To read in para 2 of ``Development`` that the Vulcan has a ``full tail`` suggests the Vulcan has a tailplane or empannage, which it does not. It is true that types exist that have no fin such as the X-36 which have been described as ``tailless`` but that usage does not overwrite a description that has been around for 60-odd years. A ``tailed delta`` is a design that happens to both a delta wing and a tailplane, eg the MiG-21.   `