That looks really cool Mark. What does it say for 30 pitot and 2.5" C=.9? Anywhere close to 920 GPM? And what if you've lost your i-phone too? I'm talking bare hands, old school stuff here. In fact, I could lose the chart, i-phone, AND the pitot and still be able to estimate the GPM, by measuring the height of the butt and length of the stream... put that in your ap and smoke it :) On Oct 1, 2016 2:04 PM, "Mark Phillips" <[email protected]> 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:Sprin > [email protected]> > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected]<mailto:Sprin > [email protected]> > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > > _______________________________________________ > Sprinklerforum mailing list > [email protected]<mailto:Sprin > [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 >
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