America's Cup update, Jonathon MacBeth on his role as grinder for Team Oracle

As AC72 catamarans do not allow stored power for operation of onboard systems the grinders onboard are the engine room and responsible for generating the hydraulic and mechanical power working in conjunction with the wing trimmers to get the maximum out of the boat.  In this video from Team Oracle Jonathon Macbeth discusses his role as grinder.