July 2 engineering brief: WRC kits, test rigs, sodium-ion storage, and hydrogen speed

Good morning. Today's engineering brief is about transition hardware: how rule makers, test labs, and energy systems are trying to keep up with the vehicles they are meant to certify. We have four signals: a World Rally Championship bridge plan, new Indian battery and e-axle test capacity, a sodium-ion push for storage supply chains, and a hydrogen combustion streamliner preparing for an official record attempt.