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Old 05-09-2009, 02:28 PM   #149 (permalink)
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Originally Posted by NeilBlanchard View Post

Question: has anybody heard of or tried making an insert for a side window that has a NACA intake on it? If you roll down the window and then hold the insert in place adn then roll the window back up to hold it in place, theis would get ventilation air into the car -- hopefully with less drag (and noise) than just opening the window?
Neil,Charles Farmer,one of the local nut-cases who runs a streamliner at Bonneville, sells a plex or Lexan clear NACA duct which rivets to clear sheet,as you'll see on NASCAR.They may be available through a race catalog.If you can't find 'em,let me know and I'll hook you up.Tuft-test your side glass and look for vorticity.You'll want to stay way from those areas,as they'll be low pressure.If you incorporate horizontal louvers,you can keep the UV off your skin,wear short sleeves and reduce solar gain into the cabin.It's a great project idea and something I've wanted to do for years.
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