Fig. 11. Cross sectional schematic of one of the largest piston engine (Burmeister and Wain K98MC-C) and three of its human operators. The geometry of piston engines larger than 4400 kg departs radically from what would be predicted from the scaling of smaller piston engines; this departure begins at the crossing point of the scaling relationships for Group 1 and Group 2 motors. Reproduced with permission from B&W Engine Selection Guide, February 2000.