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#21
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Glue it to it
On 14 Dec 2006 09:33:48 -0800, "Lou" wrote:
So, just to turn the corner a little, If a person was to consider buying a project that is wood glued with epoxy but, started over 20 years ago, should that person consider the project with 20 year old epoxy connections or should he run the other way? Lou My Jungster II all wood construction is twenty years old this year. It is stuck together with epoxy (T-88) and seems to be pretty sturdy yet. It has been continuously hangered. It has been flown into the hot south west and the damp middle west (Oshkosh) and lives in California's central valley. Ed Sullivan |
#22
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Glue it to it
Earlier, Lou wrote:
So, just to turn the corner a little, If a person was to consider buying a project that is wood glued with epoxy but, started over 20 years ago, should that person consider the project with 20 year old epoxy connections or should he run the other way? Plenty of 30-year-old composite sailplanes are glued together with epoxy. Not only that, but about half of their structure (by weight) _is_ epoxy. No sign of them spontaneously falling apart in the air. So, I'd say that age itself isn't a factor. More important is how its been stored or used, and the quality of the construction. Thanks, Bob K. http://www.hpaircraft.com/hp-24 |
#23
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Glue it to it
Lou wrote: should that person consider the project with 20 year old epoxy connections or should he run the other way? -------------------------------------------------------------------------- Dear Lou, The question of durability involved boiling sample coupons then trying to peel them apart. Based on musical instruments assembled with low-tech hide glue, when properly sealed, the moisture content of the wood -- and the strength of the joints -- can remain stable for a hundred years or more. By comparison, when not subjected to an outside agency such as heat, mold or moisture, the joints produced by virtually all modern-day adhesives are relatively ageless. When purchasing someone else's project a detailed inspection by more than one pair of eyes is always the wiser course. We now have more than seventy years of experience with epoxies as an aircraft glue. There is no inherent fault in using epoxy versus some other adhesive. What changes is the inspection criteria and that information is best supplied by someone familiar with the particular adhesive used in the project. -R.S.Hoover |
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