Quote:
Originally Posted by Cd
It would be nice to see an aerial view of your truck Phil. :-)
How much of an aero hit are you taking behind the cab of the truck ? I notice you still have the area behind the cab where the air doesn't meet-up with the aerocap.
Same question for the trailer.
Can you remind me about how much drag is created behind the truck before it makes contact with the trailer ?
Thanks and good luck
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Cd,the photos date to late September and since that time I was able to complete the drivers side fairing,'harden' the passenger side fairing,and cut in a side plex window.So the turbulence behind the cab is gone now.Tuft testing revealed zero separation problems from the cab/bed gap.
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With respect to the trailer/truck gap,Hucho published that the drag there could be as much as 20 %,or a 10 % mpg loss.So I really need those panels!
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I don't have a high enough vantage point at home to do a proper overhead shot,but I may be able to coax a friend or neighbor to either drive the rig so I can photograph from an overpass or vise-versa.I'd like to have that kinda shot for myself.
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The trailer mimics Mair's wind tunnel model,gently wrapping the top and sides into a straight 22-degree angled tail.The belly maintains the 2.5-degree diffuser angle of the truck.
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There remains a vestigial 'prow' at the top/ back.It does nothing beneficial aerodynamically,but it's very strong and will provide the base attachment point for the tailfin and drag-chute alcove I'll construct for the salt flats.It makes it hard to 'see' the trailers form.
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Tomorrow,weather permitting,I'll get down to Lewisville to purchase a replacement wheel/tire for the one I lost.I'm out of my 'funk' and excited pushing the project along.
