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Old 03-19-2011, 11:40 AM   #20 (permalink)
Vekke
Mechanical engineer
 
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Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,272

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

VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L
Diesel
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
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Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual
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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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Quote:
Originally Posted by cmittle View Post
I don't remember specifics off the top of my head but in my Fluids class we discussed wind tunnels and dimensional analysis. I do remember that we had calculated that the cross sectional area of the tunnel would have to be at least 5 times that of the object (car). If it was not large enough you would run into effects of the air compressing in the tunnel. This would cause very convoluted results.
Can aerodhead or anyone else verify this 5x part width is tunnel width/height?. I am also starting to study and manufacture my own wind tunnel or water tunnel or even both . I dont have much problems with space needed. Plans are to built 1:24 tunnel which could fit a "full sice truck in it.

I already have the acrylic sheet for clear windows and wood material needed. Still missing the fans and honeycomps, scales etc.
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