Dayton Vossloh-Kiepe-Gillig-Complete Coach Works Dual Mode Trolleybuses
 

1401-1404. These four buses are the demonstrator models for what would be the fifth generation of Dayton's trolley fleet.

1401-1402. Powered by a Cummins diesel mated to a 600V DC generator or 600V DC overhead power mated to an inverter to get AC power to run a three-phase AC motor. The diesel fans among you might think, "hey that sounds a lot like a diesel electric locomotive." And you'd be right -- specifically the 60 EMD FL9s built in the 1950s for the New Haven which served into the 21st Century on Metro-North, which were designed for diesel or third-rail operation. The bus is limited to its off-wire distance by the amount of diesel fuel it carries. 1401 arrived in late September 2014, and 1402 in October.

1403-1404. Instead of the Cummins diesel, a large battery pack is installed in the engine cradle, with the electric running gear substantially the same. The challenge and really the emphasis here is on evaluating a newer battery technology called lithium-titanate for its ability to store and release energy for extended off wire operation. The buses as delivered are using lithium-ion technology, and will be updated for lithium-titanate when it becomes available.

The RTA calls these buses "NexGen", and they are a combination of existing designs modified with new technology under evaluation. The bus shell (bus without power plant, also known as a glider) is a 40ft Gillig BRT CNG, which has a strengthened roof to accommodate additional control equipment and trolley poles, which are needed for Dayton. The electrical system and overall project management is by Vossloh-Kiepe, and modification of the buses was performed by Complete Coach Works in Riverside CA.
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