The Aeam 841 # 031 locomotive of the LokpoolAG was developed by Müller Technologie AG in Frauenfeld primarily for use in shunting, construction site, and cargo services. As things stand today, 80% of journeys can be carried out using pantographs with overhead line power, with the remaining 20% covered by batteries or a diesel generator. The new tribrid locomotive is designed to ensure 100% energy independence across multiple work assignments and shifts. Thanks to tribrid operation, diesel consumption is reduced by 85%. The basis of ths "new" locomotive is former SBB diesellocomotive Am 841 # 031 built by GEC Alstom in Spain in series of 40 in 1996/1997. Several of this locomotives were bought from the SBB by Lokpool and Müller. Some were used after revision by Lokpool as diesellocomotives Am 841. The Aeam 841 # 031, weighing 78,5 ton with a maximum velocity of 100 km/h, is leaving Landquart as test train 97520 to Sargans. Three containers on the locomotive hold water that is sprayed onto the rail heads during the journey to test adhesion and braking performance.
