Quote:
Originally Posted by aerohead
*going over the paper,it looks like only 'flat' discs were investigated.
*convex discs (MOONs) have lower drag than flat discs (I'll have to did for that data)
*when the Spirit of Ecomodder.com video is available,you'll be able to see the turbulence within the tire sidewall bulge-generated void, present with a flat cover,but mostly eliminated with the MOON-type cover.
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Interesting - any idea how much better the moon covers are? It sounds like it could be quite significant...
Of course, that still leaves open the question of whether moons with holes (or even just one smallish hole, in the middle) to reduce ventilation resistance might perform even better - quite likely not, of course, if the hole mucks up the attached flow, but if only a small region of the airflow was affected, it might. Oh for a personal wind tunnel
Quote:
Originally Posted by freebeard
The best treatment I've seen. The wheel rim appears to be 1-2" inside the circumference of the cover, inside and out. And wide compared to the tread width.
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Very nice - I've thought about covers which are wider than the rim, I'm a bit leery of trying to apply that to a daily driver though... I don't like the idea of the sidewall rubbing on stuff
