Underbody Aero Thread (splitters, panels, vortex generators)
02-10-2009, 03:58 PM
#21
+1 for ABS. Easy to cut. Easy to form with a heat gun. Easy to glue with ABS pipe glue. Good stuff for the DIYer that doesn't have a great shop to work with metal. You can easily make your own inlet or outlet vents/louvers in the ABS to move air in or out to help with the cooling issues.
Reply
0
0
02-11-2009, 12:04 AM
#25
Junior Member
Join Date: Dec 2007
Posts: 158
Total Cats: 0
very cool stuff.
Reply
0
0
02-11-2009, 10:26 PM
#30
Junior Member
Join Date: Dec 2007
Posts: 158
Total Cats: 0
agian, not an expert. The stuff I read though implied that it was only benificial to keeping the boundry layer attached on a steeply dropping off trailing edge. it was also implied that the resulting smaller low pressure wake was the only reason that drag was reduced. so the increased drag on the leading edges was more than offset by the smaller wake produced.
I'm going to make an assumption here and it may be off base, but I'm pretty sure that it's correct. if you look at the MR? version of the evo 8 there are vortex generators along the top of the steeply sloped rear window. I believe these were put there to keep the boundry layer attached further down the window to adjust the wake in such a manner to make the rear wing more effective.
I'm going to make an assumption here and it may be off base, but I'm pretty sure that it's correct. if you look at the MR? version of the evo 8 there are vortex generators along the top of the steeply sloped rear window. I believe these were put there to keep the boundry layer attached further down the window to adjust the wake in such a manner to make the rear wing more effective.
Reply
0
0
02-11-2009, 10:32 PM
#31
agian, not an expert. The stuff I read though implied that it was only benificial to keeping the boundry layer attached on a steeply dropping off trailing edge. it was also implied that the resulting smaller low pressure wake was the only reason that drag was reduced. so the increased drag on the leading edges was more than offset by the smaller wake produced.
I'm going to make an assumption here and it may be off base, but I'm pretty sure that it's correct. if you look at the MR? version of the evo 8 there are vortex generators along the top of the steeply sloped rear window. I believe these were put there to keep the boundry layer attached further down the window to adjust the wake in such a manner to make the rear wing more effective.
I'm going to make an assumption here and it may be off base, but I'm pretty sure that it's correct. if you look at the MR? version of the evo 8 there are vortex generators along the top of the steeply sloped rear window. I believe these were put there to keep the boundry layer attached further down the window to adjust the wake in such a manner to make the rear wing more effective.
Reply
0
0
02-12-2009, 10:13 AM
#33
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,338
Total Cats: 573
laminar flow has a lot of shear in it. it's like a deck of cards being slid on a table--the top one moves over the next one and so on. turbulent flow (at high reynolds numbers) can actually work more like little vortex ball bearings and lower the flow drag of a body.
the stitches on a baseball are to hold it together. but! they are very tightly regulated on official *****. same number and spacing requirements... they do make a difference to pitchers, but they are a design consequence, not the other way around.
golf ***** do have dimples to reduce drag. but they also have them to induce lift... backspin creates a pressure differential from top to bottom and helps the ball maintain hangtime.
supersonic jets also have devices to create turbulence along the wing surface.
and check this out... even super efficient cars steal this technique.
the stitches on a baseball are to hold it together. but! they are very tightly regulated on official *****. same number and spacing requirements... they do make a difference to pitchers, but they are a design consequence, not the other way around.
golf ***** do have dimples to reduce drag. but they also have them to induce lift... backspin creates a pressure differential from top to bottom and helps the ball maintain hangtime.
supersonic jets also have devices to create turbulence along the wing surface.
and check this out... even super efficient cars steal this technique.
Reply
0
0
03-11-2009, 07:40 PM
#37
I just bought an Elise mid body undertray and rear diffuser. Aluminum parts. The undertray has Naca ducts in it for transmission and exhaust cooling. Going to try to retrofit these to the Miata. The parts used were cheaper than buying aluminum sheet to fab myself! Here's a pic over at CR that shows what the diffuser looks like on a Miata.
Reply
0
0
03-12-2009, 10:04 PM
#39
I just bought an Elise mid body undertray and rear diffuser. Aluminum parts. The undertray has Naca ducts in it for transmission and exhaust cooling. Going to try to retrofit these to the Miata. The parts used were cheaper than buying aluminum sheet to fab myself! Here's a pic over at CR that shows what the diffuser looks like on a Miata.
Reply
0
0
