As I understand it, timber is one material that has no fatigue life so long as it's used and stored within limits. Those limits have been well established over the past 120 years or more of its use in aircraft construction. That's why antique wooden aircraft can remain airworthy today.
The number of KRs that have been successfully and safely operated over the past 30, 40, even 50 years suggests there is nothing wrong with the design or the specified materials (so far as structural integrity is concerned at least). But those are not the only factors in ensuring an aircraft remains safe as it ages. How the aircraft has been built, used, maintained and stored also need to be considered. TK On Sun, 7 Nov 2021 at 01:20, Dr. Feng Hsu <fenghs...@gmail.com> wrote: > Larry & all, > > 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.... > > ________________________________ -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/
