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Old 04-27-2012, 05:54 PM   #21 (permalink)
aerohead
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Quote:
Originally Posted by todayican View Post
Thanks for the input AeroHead!

Im somewhat familiar with the pusher trailers over the years (maybe aware is a better phrase, never drove with one etc)

I have the misfortune of having done a few car bodies from scratch, lots of cheese graters and foam, which is what may well happen with this one, BUT I have been doing a LOT of research into 3d routering and the concept of having it built in cad then "cut" in slices in wood, assembled, sanded and voila, trailer body mold (almost)

I think the articulation will actually make the gap filler easier to excecute. when its in "town mode" at lower speeds the gap filler would essencially be obsolete, but when she tightens up toward the car, less gap to fill.

I think this week I will do an unpowered "boxy" one with somewhat square sides with sanded edges to measure FE increases or deficits, then work on the power part.

Id love to hear your guess on increase on an otherwise modified prius c, and or unmodified 2004 Pontiac vibe with good gap seals? :-)
*Scaled Composites has a 5-axis router which is CAD-CAM linked and can render an entire fuselage from a foam billet.
*A neighbor 'cheated' with a 'scaling-pantograph' router which followed a small-scale pattern of which the pantograph scaled up to full-scale at the cutting head (reverse-tasked fiducial).
*On the Prius,you could take a look at my thread '2011 Prius to get full boat tail/faired trailer.'
On page-3 #25(permalink) is a rendering I did for my friend's Prius.There is no reason why the trailer would not cut drag in half.
*It should be the same for the Vibe/Matrix.
If I can get Jaray's,Lay's,Kamm's,and others 'templates' posted I think you'll see where I'm coming from.Most any vehicle could go to Cd 0.12 but it would be a very comprehensive project.And it would require the complicated surfaces.

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