Wind deflectors on cars, motorcycles, bicycles, aeroplanes and other vehicles make them more aerodynamic, improve handling and increase speed, stability and comfort. Wind deflectors can also improve your gas mileage. According to the manufacturers of AeroShield Deflector, a well-designed wind deflector can improve your fuel economy by up to 3 miles a gallon. How you build your own window deflector will depend on the vehicle you plan to use it with, your driving style and your local government's regulations on aftermarket accessories. However, a general description of the basic steps to build a wind deflector can help you understand the procedure and adapt it to your project.
Print a template for your wind deflector. Auto clubs and aftermarket shops sometimes provide templates for DIY aftermarket accessories. If you can't find a ready-made template to print, trace the design of a wind deflector you like.
Cut out the template and try it for size against your vehicle. Check that the size, shape and material you are planning to use for the deflector complies with your local government regulations on aftermarket products. You could be fined and required to remove your wind deflector if you do not follow local regulations.
Transfer the template to a suitably-sized sheet of Lexan or Plexiglas. Elevate the plastic from your workbench with a couple of wooden blocks. Ensure the blocks or not below the edges of your template.
Cut the sheet with a jigsaw following the contour of your template. Use a fine-tooth blade for better control around the curved areas. Use a slow speed setting to avoid melting the plastic. Smooth out the edges of the plastic with a file or a sanding block.
Mount the wind deflector to your vehicle. The method you should use will vary depending on your vehicle type and model. Drill holes to the body of your vehicle and use bolts and screws to fix clamps to it. Fit your window deflector onto the clamps.
Test your new wind deflector before you use it on public roads. Check that the deflector is properly installed and does not impair visibility or affect your stability.
Check your mounting bolts regularly to ensure the mounting clamps don't loosen. You could cause an accident if your wind deflector flies off while driving.