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aerohead · 03-31-2010, 06:32 PM

Carlo,before you commit to a design,I would recommend you find 300-pounds (136-kg) of ballast for the front seats of the Saturn,so she'll have the 'rake' she'll have with a typical load.
If you can find a portion of level concrete,a simple bubble level will reveal the actual 'max camber' location on the roof.
Measuring the ground clearance at front and rear bumpers will help you adjust your drawing.
That should be confusing enough,right?
I apologize in advance for an up-coming thread that addresses the Ford Probe IV roof-line architecture.
That car achieves Cd 0.15 with very little aft-body,although it is really 'raked',the max camber point is waaaaaaaaaaaaay back on the roof,and roof-to-boot angle never exceeds 17-degrees in the low-drag configuration.
You might be able to cheat on your angles/curvature a little.I hope to know in a little more time.

03-31-2010, 06:32 PM	#5 (permalink)
aerohead Master EcoModder Join Date: Jan 2008 Location: Sanger,Texas,U.S.A. Posts: 15,914 Thanks: 24,000 Thanked 7,227 Times in 4,654 Posts	ballast Carlo,before you commit to a design,I would recommend you find 300-pounds (136-kg) of ballast for the front seats of the Saturn,so she'll have the 'rake' she'll have with a typical load. If you can find a portion of level concrete,a simple bubble level will reveal the actual 'max camber' location on the roof. Measuring the ground clearance at front and rear bumpers will help you adjust your drawing. That should be confusing enough,right? I apologize in advance for an up-coming thread that addresses the Ford Probe IV roof-line architecture. That car achieves Cd 0.15 with very little aft-body,although it is really 'raked',the max camber point is waaaaaaaaaaaaay back on the roof,and roof-to-boot angle never exceeds 17-degrees in the low-drag configuration. You might be able to cheat on your angles/curvature a little.I hope to know in a little more time.