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MetroMPG · 06-27-2009, 08:37 PM

Yes please, winkosmosis, let's start debating "pointy vs. blunt" front ends again.

As Phil mentioned, the front isn't the issue here. Assuming you have attached flow to the peak height of the roof (or max cross section area) - which almost all modern passenger vehicles do - the overlay provides a good basis for a tapered 3D form which retains attached flow from that point aft.

06-27-2009, 08:37 PM	#23 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,519 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 52.71 mpg (US) Even Fancier Metro - '14 Mitsubishi Mirage top spec 90 day: 70.75 mpg (US) Appliance car - '14 Mitsubishi Mirage ES (base) 90 day: 52.48 mpg (US) Thanks: 4,076 Thanked 6,963 Times in 3,606 Posts	Yes please, winkosmosis, let's start debating "pointy vs. blunt" front ends again. As Phil mentioned, the front isn't the issue here. Assuming you have attached flow to the peak height of the roof (or max cross section area) - which almost all modern passenger vehicles do - the overlay provides a good basis for a tapered 3D form which retains attached flow from that point aft. __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my $800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. Ecodriving test: Manual vs. automatic transmission MPG showdown EcoModder has launched a forum for the efficient new Mitsubishi Mirage www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget