The figures quoted are the JAR22 Certification requirements of that era.
It was necessary to demonstrate that, at least in theory, it could take 50%
in excess of that, and in practice most types even exceeded that. However
that was when they were new.

At 12:09 15 December 2015, Bruce Hoult wrote:
On Tuesday, December 15, 2015 at 2:21:45 PM UTC+3, Surge wrote:
On Tuesday, 15 December 2015 10:30:11 UTC+2, Bengt Aronsson wrote:
Well, according to the tcds linked from german CAA website (
https://www2.lba.de/data/bb/Segelflug/sp_0286_01.pdf ) its certified
to
german LFS requirements without deviations. The min required load
factors
then is +5.3 / -2.65g at max maneuvering speed, lineary decreasing to
+4.0
/ -1.5g at Vne.
Airbrakes out requirements are +3.5 / -0g.


Thank you very much.
That railway line, main spar looks like it could take a lot more abuse
than the certified limits.

I'm sure Ray Lynskey's N2 got an awful lot of high speed (and often high
altitude) abuse on mountain ridges and in rotor. It survived it.