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BLOODHOUND SSC (supersonic car) is a car created by the international education initiative BLOODHOUND Project to attempt a 1,000 mph world land speed record. The team aim to break the record with the pencil-shaped car, powered by a jet engine & a rocket designed to reach 1,000 mph together with a Cosworth CA2010 Formula 1 V8 petrol engine auxiliary power unit. It is being developed & built with the intention of breaking the land speed record by 33%, the largest ever margin.

Boeing 787: The 787 Dreamliner has two primary rechargeable batteries – the main and auxiliary power unit (APU). While identical part numbers, they serve separate purposes.

Auxiliary Power Unit:

A350 XWB (MSN1) First Engine Run, Toulouse, France. Rolls-Royce’s Trent XWB engines have run for the first time on the A350 XWB (MSN1) following the start-up of the Auxiliary Power Unit (APU), as part of the preparations for the aircraft’s maiden flight. Photo by Airbus.