On Sun, 28 Jul 2002, simon glen wrote:

> In the early days of steamships it was discovered that, when a ship was
> under way, air inside the hull flowed from the stern to the bow.  Similarly,
> for moving motor vehicles, air always flows from the back to the front and
> this is the basic principle upon which all vehicle through-flow systems
> work.

This explains why the (disconnected) heater hoses on my old '75 VW would
pick up smelly air from under the engine and blow it through the heater
vents. OTOH, on my Honda, the dash vents will blow air into the car with
the fan off, when I'm on the highway.  I think it's a ram-air effect,
since the intakes are on the cowl.

             _ _
  __ _ _   _| | |  | David M. Brodbeck (N8SRE)              Ypsilanti, MI
 / _` | | | | | |  +-----------------------------------------------------
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