Vincent Black Prince Vincent Black Prince The Vincent Black Prince was a British motorcycle made between 1954 and 1955 by Vincent Motorcycles. A year before the factory closed in 1955, Vincent produced the enclosed range of Vincent Black Knight and Black Prince. Philip Vincent described it as a "two-wheeled Bentley", and the enclosed Vincents attracted a lot of attention at the November 1954 Earls Court show. Quality problems with early production of the glass-fibre mouldings necessitated a replacement supplier causing delays. The last Black Prince left the Vincent production line on Friday, 16 December 1955. Falling sales of the Series C Vincent motorcycles
Black Prince (rocket) to be inefficient and difficult because of the large differences in the diameters of the 3 metre (10 ft) wide Blue Streak and the metre-wide (3 ft) Black Knight. Fitting satellites into a three-foot payload fairing could also have been a challenge. Nevertheless, these difficulties were also encountered with successful American rockets including the Thor and Atlas. Black Prince (rocket) Black Prince was a proposed British-led satellite expendable launch system. It would have made heavy use of the preceding Blue Streak missile and the Black Knight test rocket development programmes, as well as some new elements, to produce a British-built