Quote:
Originally Posted by California98Civic
The block is coming along nicely. Do you remember Metro's Gen1 Insight with the boattail? There were a couple others too. Botsapper? 3wheeler? I forget who. Anyway, their testing showed MPG results. You could build a shorter version and test it. What I liked about MetroMPG's was he worked around the OEM taillights. Bring the edges of the rear box cavity closer to the sides of the car...
Build it with carboard and painter's tape at first and set up ways to measure aero effects, fine tuning in light of the results.
Great pictures!
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That's the beauty of this online community. I will definitely re-explore their boat tail builds for inspiration.
Quote:
Originally Posted by aerohead
I've not seen anything in the literature which addresses a partial cross-section box cavity. The sides would be isolated, leaving only top and bottom with access to the active flow. Pressure spikes would be likely. Vorticity.
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I agree. Upon reflection, I might build a short-length cavity box (maybe a foot or so) that covers the sides, without blocking the OEM rear lights. Interestingly enough, the rear light assemblies have a protrusion that seem to mimic a vortex generator. I will add a photo soon.
