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Old 01-13-2011, 03:55 AM   #2 (permalink)
Mechanical engineer
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Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,024

Siitin - '98 Seat Cordoba Vario
90 day: 58.56 mpg (US)

VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L
90 day: 104.94 mpg (US)

A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual
90 day: 64.64 mpg (US)

Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L
90 day: 54.57 mpg (US)

Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual
90 day: 32.98 mpg (US)

A2 1.4TDI - '03 Audi A2 1.4 TDI
90 day: 45.68 mpg (US)

A2 1.4 LPG - '02 Audi A2 1.4 (75hp)
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I think there should be better description how to shape that "cover". In my own surveys from std low drag cars that last pointing edge should be measured so that if you put some straight thing tangential to the last edge, that part thould touch the wipers upper edge.

In my opinion your version looks like it deflects air too much up which will cause the air to become "turbulent" and flow backwards. In my seat I did tuft testing and first my "cover" was too high and that happened. When I carved it so that air will gently touch the wipers air direction changed.

10062009571.jpg - Windows Live

Pictures are there. and the last one is how it should be .
17062009587.jpg - Windows Live

Vesa Tiainen innovation engineer and automotive enthusiast
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