Posted: Fri Aug 06, 2004 4:30 pm
http://www.engineeringtoolbox.com/18_404.html
Interesting read here. I decided to search for something like this after finally reading some posts at iScF, some idea about teflon coating to reduce friction. The page shows how many feet you'll lose per 100 feet of plastic pipe (works for PVC) based upon the output of the pipe and the size of the pipe. I did some pretty rough calculations based upon my APH on a setting that lasts 4 seconds, and that's about 6 gallons per minute in output. That means I lose 8.83 feet for every 100 feet of pipe. I then divided the 52 foot range I get about from that nozzle by 100 (actually I skipped this because I knew it would be .52) and then multiplied it by the number the table gave me to get 4.5916 feet lost. That's not including drag btw. The larger the pipe the less friction it looks like too, must be because there is more room for the water where it's not touching the side. Another plus from larger ID pipes I guess!
[edit]
A few other charts I'll link to below.
http://www.plumbingsupply.com/flowchart.html
http://www.aquaticeco.com/index.cfm/fus ... il/ttid/54
Interesting read here. I decided to search for something like this after finally reading some posts at iScF, some idea about teflon coating to reduce friction. The page shows how many feet you'll lose per 100 feet of plastic pipe (works for PVC) based upon the output of the pipe and the size of the pipe. I did some pretty rough calculations based upon my APH on a setting that lasts 4 seconds, and that's about 6 gallons per minute in output. That means I lose 8.83 feet for every 100 feet of pipe. I then divided the 52 foot range I get about from that nozzle by 100 (actually I skipped this because I knew it would be .52) and then multiplied it by the number the table gave me to get 4.5916 feet lost. That's not including drag btw. The larger the pipe the less friction it looks like too, must be because there is more room for the water where it's not touching the side. Another plus from larger ID pipes I guess!
[edit]
A few other charts I'll link to below.
http://www.plumbingsupply.com/flowchart.html
http://www.aquaticeco.com/index.cfm/fus ... il/ttid/54