Power equipment for an APT to be used on non-electrified routes: an apraisal on the turbomeca bi-turmo unit (IM-PD-044)

We have previously considered the Turbomeca Bi-turmo group, even with the Turmo X engines, to be unsatisfactory for an APT 3 axle power car because the unit with electric torque conversion yielded only 70% of the specified power required at the rail (the unit also supplying APU power). The...