Hi Aerohead, You were the one that I had hoped would respond. I can usually follow your posts pretty well but I have read what you wrote several times and frankly I am missing something.
I was in motion when the rain started. Usually (on other cars) there is a turbulence at the back that makes the back window wet in a random fashion. Where as the rear window on the mercedes was completely dry.
Do you think the 85 w123 mercedes was designed with the knowledge about Hucho? The car was first produced in the mid 70's I believe.
Quote:
Originally Posted by aerohead
Once the air gets to the point of maximum greenhouse cross-section it is 'leeward' of the body,no longer attacking, and it can't 'push' the water as it would in the forebody.
If you were already in motion when the rain began,the water would be managed by the drip rail system (hidden in modern cars since Hucho's work) or blown over the captured-vortex and the captured-vortex atop the trunklid would help to centrifuge the rainwater away,with only moving air licking the surface of the backlight.
If you started out in a rain,this vorticity would eventually dry the backlight if your velocity were sufficient enough to outrun the momentum of the water.
If you drive a square-back, the wake turbulence will transport water pumped by the tires up from the road surface to totally obscure your view.Something which the re-attached flow on the 300's boot trailing edge prevents.
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