Vincent Black Knight Vincent Black Knight The Vincent Black Knight is 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 "Black Knight" and "Black Prince". Known as the 'Series D', the Black Knight was an upgraded Vincent Rapide which was fully enclosed to keep the rain and dirt from the rider. As well as allowing Vincent to reduce production costs, the enclosure actually improved performance by directing more air to the rear cylinder. Phil Vincent described it as a 'two-wheeled Bentley' and the enclosed Vincents got a
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