Keep it simple. You are trying to tell us that it is easier to measure the time it takes for stream to hit ground and distance when you "lost the chart?"
Honestly man, learn to keep things simple. Remember the old saying, "Just because you can do something doesn't mean you should." If you are trying to determine flow this way because you forgot something, reschedule the test. Your methods are far too complicated for a simple task. You have way too much room for error. So be like the Disney princess: "Let it go!" 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 2, 2016, at 5:15 AM, Brad Casterline <[email protected]> wrote: > > Just one more thing and then I'll quit. > > "how to estimate the gpm of a flow test by yourself because you've lost the > pitot that came with the kit, and there are no formulas in the standards or > aps for that" > > t = SQRT (2h/g) > where t is the 'time of flight' in seconds and h is the height of the butt in > feet. > Say h = 4ft. t=(8/32)^.5=.5 sec. > Say the length of the stream is 20 ft. If the water went 20 ft in .5 sec it > is going 40 ft/sec. > A 2.5" C=.9 butt is .0307 ft^2, * 40 ft/sec=1.228 ft^3/sec, *7.48*60= 551 GPM. > > No one in their right mind would avocate basing final calcs on this. > > So it's an open question as to wether or not I would. . . > > ;) > > Brad > >> On Oct 1, 2016 4:30 PM, "Brad Casterline" <[email protected]> wrote: >> Thanks Trevor. >> I like graphs. I'm a slow learner but i dont let that stop me. >> >>> On Oct 1, 2016 4:11 PM, "Brad Casterline" <[email protected]> wrote: >>> Wow Ron thanks! >>> That pow thing blows my mind but that's ok. >>> I might seem overly sensatitve about this but it is one of the two or three >>> 'light bulb' moments I've had in my sprinkler career. I don't know if you >>> have heard designers say things like, "suddenly it just clicked", or not. I >>> have, but I guess I'm the only one who heard gravity click with sprinkler >>> calcs. Before that Q,K,P was so mysterious, although I could sleep at >>> night, it was fitfull. >>> >>> Thanks again man, >>> >>> Brad >>>> On Oct 1, 2016 3:54 PM, "rongreenman ." <[email protected]> wrote: >>>> 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:[email protected]> >>>>>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> Sprinklerforum mailing list >>>>>> [email protected]<mailto:[email protected]> >>>>>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >>>>>> >>>>>> _______________________________________________ >>>>>> Sprinklerforum mailing list >>>>>> [email protected]<mailto:[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 >>>>>> >>>>>> >>>>> >>>>> _______________________________________________ >>>>> 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-) >>>> >>>> _______________________________________________ >>>> 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
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