Honda RA615H

The Honda RA615H was a V6 1.6L turbocharged hybrid engine developed by in to power the McLaren MP4-30. This was the first power unit developed by Honda in Formula One since Honda sold their works team in .
 decided to design their chassis using a "size zero" concept, meaning that Honda had to produce a smaller engine and used some new technology to fit the power unit into the small MP4-30 chassis. The power unit featured a split turbo, much like the engine of the time, but it was positioned in a tighter space. To accommodate the smaller size, Honda pioneered the use of an axial flow compressor, replacing the large centrifugal fan with multiple smaller fans. The design allowed the turbocharger to spin up faster, but limited the maximum boost the unit could provide.
Additionally, Honda made the unconventional decision to combine the ERS battery and two control units into a single module. This gave the benefit of a smaller, lighter unit with the challenge of some more difficult cooling and reliability concerns.
The engine performance suffered. So much so that Fernando Alonso labelled the engine "embarrassing" and a "GP2 engine" during Honda's home race at the 2015 Japanese Grand Prix.
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Category:Honda