One of the quintessential body components on a Land Rover are the “scuttle vents”. These enable a flow of air direct into the cab by opening up two large longitudinal vent flaps on the bulkhead…. one might call it the ram air effect.
They featured on all but the very earliest Series 1s right up to the 2007 Defender. One push of a lever would force cool air direct into the cab… and if NOT fitted with the fly screen…. along with any passing wasps.