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Old 12-26-2015, 01:32 PM   #49 (permalink)
aerohead
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vortices

Quote:
Originally Posted by rumdog View Post
The only thing awkward to haul is the long stuff like rebar (20') and baseboard (14'), and this is the best ive come up with - without having a rack. Long ladders and lumber fit in the box.
The edges of the topper bug me a bit... would like to round them off... minimise the vortexs coming off those long sloping edges. Will have the shop soon, so anything is in the cards...
I would like to make one with slightly different style.
Merry xmas all,
Rumdog
Last Friday,I snagged a 2000 paper online,by Prof. Alberto Morelli of the Turin Polytechnic Institute,Italy.His paper was about continuing research on basic streamlined bodies.
He said that for the lowest drag,the rear must be cut off just like a loaf of bread,'Shape K'

And that the chop,when viewed from the rear,should be circular,or elliptical in shape in order for the 'ring vortex' to manifest,which in turn enables the 'fluid tail.'

No 'angles' in the shape can be present,or it won't work.
He shows a 'fluid tail' for a 1984 FIAT Tipo-3 concept car,with around Cd 0.179.The tail is just 'smoke.'
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