Brad- 919gpm using the standard formula by hand. The only trick is the square root of P which may have to be bracketed if it's not one you know. I can use a simple calculator for that though. Took about 45 seconds with a calculator with a square root function. A couple of minutes if i need to bracket and less than the 45 seconds if its a square root I know (like for 30).
And here is the calculator tape for the truly annal: pow(30,1/2) * 6.25 * 0.9 * 29.83 = 919.04421883382455 2.5 squared is just one of those I have memorized. On Sat, Oct 1, 2016 at 1:35 PM, Trevor Spain <[email protected]> wrote: > If you need to be able to print a report or save a report as a pdf, > download the free hydrant flow test program from here: > > http://igneusinc.com/files/files.html > > Trevor Spain > > > On 10/1/2016 2:03 PM, Mark Phillips wrote: > >> http://www.firehydrant.org/info/hycalc.html >> >> Love it and used it for years >> >> >> Sent from my Verizon 4G LTE Droid >> On Oct 1, 2016 2:52 PM, Travis Mack <[email protected]> wrote: >> Follow the formula in the standards. >> >> 29.83 x hydrant coefficient x pumper modification x diameter x diameter x >> sqrt (pitot pressure) >> >> Keep it all simple. No need to overcomplicate everything. >> >> There are even several apps to put in your phone to do this stuff. >> Keep it all simple. >> >> Travis Mack, SET >> MFP Design, LLC >> "Follow" us on Facebook: https://www.facebook.com/pages >> /MFP-Design-LLC/92218417692 >> Send large files to MFP Design via: >> https://www.hightail.com/u/MFPDesign >> >> Sent from my iPhone >> >> On Oct 1, 2016, at 11:35 AM, Brad Casterline <[email protected] >> <mailto:[email protected]>> wrote: >> >> >> My pleasure Jeff, thanks for saying. >> >> On Oct 1, 2016 1:32 PM, "Jeff Normand" <[email protected]<mailto: >> [email protected]>> wrote: >> Thanks for sharing Brad. >> >> On Sat, Oct 1, 2016 at 1:28 PM, Brad Casterline <[email protected] >> <mailto:[email protected]>> wrote: >> >> Say it's a 2.5" butt (small, smooth and well rounded my personal >> favorite) so C=.9. >> >> ((2.5/24) ^2) * PI = .034 ft^2. >> .034 * .9 = .0307 ft^2. >> >> Say pitot = 30 PSI. >> 30/.433=69.284 ft (h). >> v=(2gh)^.5=(2*32.2*69.284)^.5=69.8 ft/sec. >> .0307 ft^2 * 69.8 ft/sec = 2.05 ft^3/sec, * 7.48 * 60 = 920 GPM. >> >> That's not too shabby! >> >> Brad >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected]<mailto:Sprinklerforum >> @lists.firesprinkler.org> >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum- >> firesprinkler.org >> >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected]<mailto:Sprinklerforum >> @lists.firesprinkler.org> >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum- >> firesprinkler.org >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected]<mailto:Sprinklerforum >> @lists.firesprinkler.org> >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum- >> firesprinkler.org >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum- >> firesprinkler.org >> >> >> > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum- > firesprinkler.org > -- Ron Greenman 4110 Olson Dr., NW Gig Harbor, WA 98335 [email protected] 253.576.9700 The Universe is monstrously indifferent to the presence of man. -Werner Herzog, screenwriter, film director, author, actor and opera director (1942-)
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