01-29-2010, 01:53 AM
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#31 (permalink)
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Master EcoModder
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A musical dam.
If you can't be BADASS at least you can have BASS.
(Speaking for myself, of course.)
Side note: Just found Hucho's aero bible and ordered in on interlibrary loan. I'll buy it for sure next time I'm rolling in cash.
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02-05-2010, 02:37 AM
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#32 (permalink)
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Master EcoModder
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Finally, a picture of the airdam/chin spoiler. This is the prototype. I will cut a new one with the centre cut higher and with the coroplast tubes running horizontal. I'm also going to check out the lawn edging to see how that might work. So far the butt-o-meter reports better coasting but that's not verified on my known hills.
It's attached with angle brackets sheetmetal screwed into the lower bumper edge. Easy installation. Coroplast has straight top edge.
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Vortex generators are old tech. My new and improved vortex alternators are unstoppable.
"It’s easy to explain how rockets work but explaining the aerodynamics of a wing takes a rocket scientist.
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02-05-2010, 02:56 AM
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#33 (permalink)
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Moderate your Moderation.
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Looks really good!
When you cut the new one, look up "kerf" cutting to make the bends easier with the fluting on the horizontal plane. With the radius you're making there, only a few cuts will get you a good curve easily, and you can add the strength back with either coat hanger wire inserted in the flutes, or some plain old glue. If you use glue, you'll have to hold the kerf cuts closed until it sets solid.
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02-05-2010, 02:57 AM
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#34 (permalink)
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Moderate your Moderation.
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02-05-2010, 08:57 AM
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#35 (permalink)
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Coroplast will bend just fine longitudinally without any special cutting for this radius. The smooth bends will also add strenght vertically. You'll see the bends in front of the wheels will be plenty stiff, it's impressive.
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02-05-2010, 12:56 PM
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#36 (permalink)
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Moderate your Moderation.
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Will it bend over that much of a curve? I had trouble getting it to stick to the shape of my grille on the van, so I made a few vertical slices through the flutes, and it took the shape normally. I didn't add anything to those panels, though, except duct tape to hold them on.
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02-05-2010, 01:41 PM
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#37 (permalink)
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You need more than tape to hold it in place, but it does bend nicely. The following was done just by screwing the flat cut piece in place.
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02-05-2010, 05:09 PM
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#38 (permalink)
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Quote:
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When you cut the new one, look up "kerf" cutting to make the bends easier with the fluting on the horizontal plane.
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Hmmm. Kerf... I think I have one of those around here somewhere...
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Vortex generators are old tech. My new and improved vortex alternators are unstoppable.
"It’s easy to explain how rockets work but explaining the aerodynamics of a wing takes a rocket scientist.
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02-05-2010, 05:16 PM
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#39 (permalink)
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That's what I plan to do when I get another piece of coroplast. A bit higher in the middle and deeper on the ends to shield the wheels.
looks good. Nice side skirts too. What are the construction / attachment details on those?
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Vortex generators are old tech. My new and improved vortex alternators are unstoppable.
"It’s easy to explain how rockets work but explaining the aerodynamics of a wing takes a rocket scientist.
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02-05-2010, 06:05 PM
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#40 (permalink)
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It's super easy. I Just cut a piece of coroplast 6 inches longer than the rocker panel at each end. Apply caulk along the rocker panel. Three screws to attach it to the front wheel plastic fender liner, jack the back and remove the wheels, pull the coroplast pretty tight so it's well tensioned, fold the end back into the wheel well and three other screws into the rear wheel fender liner to fix it. I use three screws to adjust and set the vertical angle of the skirts. And then top it off with a nice bead of caulk along the topline of the skirt.
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