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
Minim, Martap access. Studies of feasibility and environmental impact were carried out and a mining development plan was completed in May 2016. Financing for the construction of a facility for refining the bauxite into aluminium and for transport infrastructure is still outstanding. Minim, Martap Minim (or Minim II, or Menim) is a village in the commune of , in the department of Vina, in the Adamawa Region, Cameroon. The village contains Cameroon's main source of bauxite. In 1967, Minim contained 90 inhabitants, mostly from the Kaka ethnic group. In the 2005 census, the settlement contained 432 people. Along with Ngaoundal, Minim is