in my work, there is a requirement to test two plastics and compare the properties for an automotive application. the testing is done by an external agency, with whom i have no background, and they just give a table of results. what tests are they doing, how do they do them, why do they do them, and what tricks should i be on the lookout for? [more inside]
posted by edtut on Jun 23, 2009 - 2 answers

mechanical gears question - what is the efficiency of simple plastic set of small mechanical gears [more inside]
posted by edtut on Jun 2, 2008 - 6 answers