aviator_edb Posted October 23, 2009 Share Posted October 23, 2009 Ok, so I'm trying out a new Michael Eng variable ratio epoxy pump. I'm using MGS 285 and slow hardener. It supposed to be 100:50 by volume and 100:40 by weight so I set the epoxy pump up for that volume ratio. (Actually, it came set for 2:1 but I double checked it.) Here's my question. After priming the pump I went to test the ratio by weight. Using a fairly accurate scale I come to 100:43 by weight. I'm a little rich with the hardener. Do I need to get it closer to 100:43 or should I quit worrying and build some airplane parts? Quote Link to comment Share on other sites More sharing options...
rickh Posted October 24, 2009 Share Posted October 24, 2009 Weeellll... MGS 285 product sheet says 100:40 +/- 2. I guess if you're at ease with your cardiologist saying "that's close enough..." PDF attached, it may not be the most current. Rick MGSEpoxy285.pdf Quote Rick Hall; MK-IV plans #1477; cozy.zggtr.org Build status: 1-7, bits of 8-9, 10, 14 done! Working on engine/prop/avionics. Link to comment Share on other sites More sharing options...
aviator_edb Posted October 24, 2009 Author Share Posted October 24, 2009 Rick, duh! I hadn't thought of the product sheet. Maybe I'm being anal but +/-3 != +/-2. I can tweak it a bit to get it closer. Thanks. Quote Link to comment Share on other sites More sharing options...
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