Quote:
Originally Posted by freebeard
All I saw was a pop-up demanding something about cookies.
There was a time when the Holy Template would have been the example, but here we are post-Julian Edgar.
The theory behind blisters and fillets suggests the spats should be ahead and behind the wheel and [x?] times the tire width.
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1) I think that it's a mistake to use the term 'blister' in conjunction with 'wheels.'
2) Wheels are associated with wheel covers, spats, deflectors, skirts, and fairings.
3) Fillets are used to blend a structure onto a body, killing hook-vortices, and the interference drag they'd create in the absence of the fillet.
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4) Looking either from above, or below, wheel fairings could be looked upon as a two-dimensional flow, symmetrical wing section. In this capacity, there IS an ideal thickness ratio ( length divided by width ) for low drag. As with streamline bodies of revolution, if a section is 'longer,' it will suffer increased skin friction. If it's 'shorter', it will suffer increased pressure drag. It's a drag 'bucket' phenomena. We covered this in 2007. I don't have that with me today. ( around 3.8:1, and the aft portion of it would be around 66% of overall length )