On 11/6/2021 10:20 AM, Dr. Feng Hsu wrote:
This could be a serious safety concerns on the structural integrity of the
KR design, such as the decision to use wood for the Spar. My concern is
that the aging of wood would likely to take a toll on the material
strength...
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
If stored properly, dry conditions, moderate temperatures, the wood
should not deteriorate with age. How many aircraft are flying with wood
spars / ribs that were built 75 years ago. I'm setting on oak kitchen
chairs that were "refinished" for my parents as a wedding present 100
years ago. I'm guessing my grand kids could still be using them 100
years from now.
As this is the first "in flight" structural failure that I'm aware of in
my 30 years in the KR community, and given the fact that the pilot was
an "aerobatic" pilot, I suspect there is more to the story than we are
aware of at the moment. Just a suspect on my part, no facts.
Larry Flesner
________________________________
-Please see LIST RULES and KRnet info at http://www.krnet.org/info.html
-Change list delivery options at
https://list.krnet.org/list/krnet.list.krnet.org/ Affinity List Info Board
-Search recent KRnet Archives at
https://list.krnet.org/empathy/list/krnet.list.krnet.org/
-Search John Bouyea's decades of archive at
https://www.mail-archive.com/krnet@list.krnet.org/
