FSA Calculator - RC Groups
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This thread is privately moderated by SteveC68, who may elect to delete unwanted replies.
Dec 18, 2009, 01:16 PM
Oh Yeah!
SteveC68's Avatar

FSA Calculator

Here is a simple Excel spreadsheet that calculates FSA of a ducted fan. I see people ask how to calculate FSA a lot. This spreadsheet will give you 100% FSA down to 70% FSA in 5% increments. Only input the diameters of the fan shroud and the fan hub (green cells). The fan hub diameter should be the largest diameter of the hub as some fans have a pointed tip.

I have updated this spreadsheet. It now also calculates exhaust diameter at different percentages of FSA from 100% down to 70% in 5% steps. This is done for both a single exhaust outlet and a bifurcated (two outlets from one fan) exhaust.

Somehow I deleted this spreadsheet a while back. Sorry about that.
Last edited by SteveC68; Sep 11, 2011 at 12:35 PM.
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Aug 17, 2013, 09:42 PM
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losthorizonmba's Avatar


Thanks. Much appreciated
Jun 21, 2014, 07:59 PM
Registered User
Thanks! Glad to have run across this

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