Getting slack with DWV usage

Post questions and info about combustion (flammable vapor) powered launchers here. This includes discussion about fuels, ratios, ignition systems and anything else relevant to launchers powered by igniting things like hairspray or propane.

Postby spuzi14 » Fri Jul 28, 2006 10:58 pm

You declare, I'll ask.

This discussion is very true and I never really thought of it!
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Postby fox_shooter2 » Sat Jul 29, 2006 2:50 am

Well, just went out to the shed to measure some pipes. here are the following specs (Standard Aus PVC):

DWV 40mm, OD=43.0mm, Wall=2.2mm, wall relative to diametre=5.1%
DWV 50mm, OD=56.5mm, Wall=2.5mm, wall relative to diametre=4.4%
DWV 65mm, OD=68.8mm, Wall=3.0mm, wall relative to diametre=4.4%
DWV 80mm, OD=74.1, Wall=2.0mm, wall relative to diametre=2.7%
DWV 90mm, OD=89.8, Wall=1.8mm, wall relative to diametre=2.0%
DWV 100mm, OD=110.0, Wall=3.0mm, wall relative to diametre=2.7%

Average wall thickness is 3.6% the diametre of pipe.



Class 12/Sch 40 PVC
15mm, OD=21.3mm, Wall=1.6mm, wall relative to diametre=7.5%
20mm, OD=26.5mm, Wall=1.7mm, wall relative to diametre=6.4%
25mm, OD=33.6mm, Wall=1.8mm, wall relative to diametre=5.4%
40mm, OD=48.2mm, Wall=2.7mm, wall relative to diametre=5.6%
50mm, OD=60.4mm, Wall=3.3mm, wall relative to diametre=5.5%
80mm, OD=89.0, Wall=5.0mm, wall relative to diametre=5.6%
100mm, OD=114.4mm, Wall=6.5mm, wall relative to diametre=5.7%

Average wall thickness is 6% diametre.



80mm and 90mm are stormwater grade PVC which is thinner that sewer. Hope this starts things off.
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Postby matti » Sun Nov 19, 2006 6:15 am

Sorry for being abit late on this but foxshooter I am also an aussie and cannot find SCH40 pipe anywere in bunnings so I settled for 3mm thick DWV (combustion). we shall see how it goes tomorrow.
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