Re: [Amps] 8877 chimney

["Tony Brock-Fisher" <barockteer@aol.com>]

-A tight fit means no air goes up the outside of the fin assembly, whereas a 
thin layer of air flow will take advantage of the surface area of the outside 
of the fins.

-A thin flow layer up the outside may lower airflow resistance due to vortex 
shedding at the top exit point.


Maybe there's a secret here from fluid dynamics...


-Tony, K1KP
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