4-8-4+4-8-4 classes of 4-8-4+4-8-4 steam locomotives across the globe, all of which were constructed by Beyer, Peacock and Company, the owners of the Garratt patent. The predecessor 4-8-2+2-8-4 Double Mountain was probably the optimal Garratt wheel arrangement, with the four-wheeled leading bogies and the two-wheeled trailing trucks on each engine unit ensuring stability at speed and with sixteen coupled wheels for traction. More coupled wheels would inhibit the locomotive on tight curves, while the only advantage of more non-coupled wheels, such as on the Double Northern, was to reduce the axle loading. The second Double Northern locomotive class were the AD60
Quavers shown in 1996 (animated by Aardman), which featured Quentin trying to catch a Quaver that had blown out of his bedroom window, ending with the slogan "They're floaty light!" Quavers Quavers are a British snack food, originally made by Smiths, and now produced by Walkers. Walkers, owned by PepsiCo, purchased the Quavers brand in 1997, when it became one of the Frito Lay International brand names. Quavers were launched in 1968 with the advertising slogan "you get a lovely lot of Quavers in a bag". Packaging described them as "curly potato puffs". In 2007, Walkers changed the packaging for all