The Class 319 Flex concept is designed to create a bi-mode train by fitting two diesel powered alternators, one under each of the driving trailer cars. The diesel alternators provide power to the existing traction and auxiliary equipment to allow the EMU to operate without an overhead or 3rd rail supply.
I wonder ...
Current reckoning is that engines that meet NRMM IIIB with enough power for a DMU are too big to go under the floor. The D-train gets round that (and a low floor) by using smaller engines in pairs. They are talking about two pairs (800 HP, or 600 kW, total) per train.
The 319 is heavier and will need over 1 MW prime power to match the existing performance. That's nearly twice a D-train's power, and looks hard to do on only two cars. So have the engine makers managed to reduce the profile of the bigger IIIB versions? Or will it be pretty slow?