Anemometer: Air VelocityAfter affixing anemometers fore and aft of the rear differential, a dead zone was discovered. Like the wing of plane, the rear differential splits the air. At a road speed of 70 mph, air speed was measured at 32 MPH in front of the differential and 11 MPH 20 behind the differential. This indicated an area of dead air. This low velocity dead zone extends as far out as 36 inch from the back face of the cover. No matter how deep the cooling fins are, theyre unable to adequately reject heat due to inadequate airflow over the surface of the fins. This discovery resulted in the Ram-Air scoop concept. As the truck moves through the air, cool static air is forced into the Ram-Air scoops and directed 90 degree up and through the long, thin heat radiation fins.
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