31. Work expanded into the aviation industry and Gnome and Le Rhone aero engines were made. 32. There was also a serious shortage of advanced aero engines in Germany during the late 1930s. 33. Over the next decade, Hirth became one of Germany's leading aero engine manufacturers. 34. "' MTU Aero Engines AG "'is a German aircraft engine manufacturer. 35. Chassis production was suspended in 1917 to enable Rolls-Royce to concentrate on aero engines . 36. The firm also built aero engines . 37. "' Lawrance Aero Engine Company "'was an American aircraft engine manufacturer. 38. Today, Rolls-Royce aero engines are in operation or on order with 10 Chinese operators. 39. MTU Aero Engines is a major partner of the programme, with 22.5 % share. 40. Lombard went on to become the Chief Engineer of the Aero Engine Division of Rolls-Royce.
