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Old 11-11-2012, 12:10 PM   #141 (permalink)
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In high pressure areas, you might find out that yer gonna need some washers between the pop rivet and the Coroplast. On my access doors, a few pop rivets got ripped out...so I had to re-rivet them with a washer to apply more surface area to keep the rivet from ripping through the Coroplast.

You might even consider using some pan head screws and a washer as long as you have something to fasten the screw to.

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Old 11-11-2012, 02:22 PM   #142 (permalink)
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Pretty cool looking. Going to tuft test it?
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Old 11-11-2012, 06:57 PM   #143 (permalink)
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Yes, I know what you mean about the pop rivets pulling through. It was too windy today to do any meaningful testing, however, the gauge showed over 70mpg with a 30 mph tail wind for several miles at 55 mph. The flow might be detached under the boat tail, judging by the spray in a tailgater's headlights and leaves on the road..I may have lower the bottom surface. Maybe tuft testing next weekend.
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Old 11-13-2012, 07:25 AM   #144 (permalink)
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I have a funeral to got to Wednesday and I have this silly tail box on the car.
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Old 11-13-2012, 03:23 PM   #145 (permalink)
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Tuft testing boat tail bottom. Not as good as I thought, plenty of separation and turbulence.




Added EPS foam between frame and floor, 4 to 5 inches lower in the center.

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Old 11-13-2012, 05:44 PM   #146 (permalink)
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looks like we have a new member to the boat tail community!
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Old 11-13-2012, 10:49 PM   #147 (permalink)
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Drove 110 miles to the memorial service and back, got 63 mpg there and 59.8 back.Tail wind there and head wind back. Gauge is reading about 5% high due to map sensor reference voltage drop across the diode, so that would be 60 mpg there and 57 mpg total round trip, driving 65 mph and 28F ambient. Engine inlet air was between 95 and 100F.
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Old 11-14-2012, 03:02 PM   #148 (permalink)
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Not bad. Looks like you're close to some pretty smooth airflow.

Are you planning on finishing it and keeping it for awhile?
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Old 11-14-2012, 08:21 PM   #149 (permalink)
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sc1 - '98 saturn sc1
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90 day: 43.17 mpg (US)

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tractor - '66 International Cub cadet 129

minivan - '93 oldsmobile Silouette

Tracker - '96 geo tracker 4wd 2d soft top
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Im probably one of the few that got to hypermile with a boat tail in a funeral procession. Mileage dipped to 51 behind a two footed stop-go driver. Got to go through lots of red lights being second to last in line. Mileage was only 53 mpg by the time we got home due to traffic jam on the tollway too. Talk to a fellah at the service that owns a trucking company, he said aero attachments weigh too much, he's a heavy hauler and it would reduce his payload. He gets 6 mpg.
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Old 11-15-2012, 07:39 AM   #150 (permalink)
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That's good mpg for the temps and traffic .

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