06-04-2013, 03:08 PM
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#181 (permalink)
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Batman Junior
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I dunno. Call me a conservative old fuddy duddy, but since I'm not an expert, I look to the experts to show me what to do.
And I can't find any examples of super-high efficiency, low Cd vehicles with ricer-scale, befinned diffusers on them!
EDIT: wait a sec ... Fog of memory is parting... I think someone's going to post a pic of a solar car that has 'em.
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06-04-2013, 03:14 PM
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#182 (permalink)
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(:
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It looks like a sphincter blowout to me.
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06-04-2013, 04:42 PM
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#183 (permalink)
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Master EcoWalker
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Quote:
Originally Posted by MetroMPG
I'm going to have to start the Canadian division: but "L/100km Militia" doesn't have the same ring to it, eh?  |
What about milliliter/kilometer militia or cc/km militia for shorthand?
Cheers, Bart (40 CC/KM @ last fill)
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For confirmation go to people just like you.
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06-04-2013, 05:37 PM
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#184 (permalink)
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Master EcoModder
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jime57 -- I had one design, pace Colani, that had two fences on the outside, spring-loaded and with skateboard wheels in the tips.
Lately, I lean toward titanium skids.
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06-04-2013, 06:45 PM
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#185 (permalink)
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also races Sportbikes!!!
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wow 108mpg w/ aero mods and w/o MIMA - very impressive, sir!
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06-04-2013, 06:55 PM
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#186 (permalink)
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Master EcoModder
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Quote:
Originally Posted by MetroMPG
I dunno. Call me a conservative old fuddy duddy, but since I'm not an expert, I look to the experts to show me what to do.
And I can't find any examples of super-high efficiency, low Cd vehicles with ricer-scale, befinned diffusers on them!
EDIT: wait a sec ... Fog of memory is parting... I think someone's going to post a pic of a solar car that has 'em.
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I tend to agree with you overall observations. I was just kicking the idea around.
Formula 1 cars have been productively using various diffuser fins for several years now, but I'm not sure that the 150-175 MPH difference in speed makes that comparison relevant.
And, yes I remember seeing that solar car. As I recall, the fins were small and at the very rear. |
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06-04-2013, 07:30 PM
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#187 (permalink)
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Master EcoModder
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Quote:
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Originally Posted by MetroMPG
And I can't find any examples of super-high efficiency, low Cd vehicles with ricer-scale, befinned diffusers on them!
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Yet...
My point would be that boattails have ricer-scale plates (w/ plan taper) without the fences, so why not add them? It looks like the fences fan out to pull air out into the wake of the rear tires.
...oh, and
Quote:
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a conservative old fuddy duddy
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'splain the boattail.
Last edited by freebeard; 06-04-2013 at 07:37 PM..
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06-04-2013, 07:41 PM
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#188 (permalink)
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Not Doug
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06-07-2013, 01:50 PM
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#189 (permalink)
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Batman Junior
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Quote:
Originally Posted by freebeard
My point would be that boattails have ricer-scale plates (w/ plan taper) without the fences, so why not add them?
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Oh - when I saw that Lotus pic, the thing that I was (unclearly) reacting to was the plethora of fins/strakes. The outside "fences" (a.k.a. rear wheel boat tailing) definitely make sense, and there's lots of precedence for those on high-efficiency cars & prototypes.
I bet adding those would probably help the U.F.O.'s aero, and if doing so means the underside of the tail then technically becomes a diffuser (if un-befinned), so be it! |
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06-07-2013, 06:39 PM
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#190 (permalink)
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Master EcoModder
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Quote:
Originally Posted by MetroMPG
EDIT: wait a sec ... Fog of memory is parting... I think someone's going to post a pic of a solar car that has 'em.
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The Loremo has a bit of a diffuser
http://ecomodder.com/forum/showthrea...ion-14519.html
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