On Monday, January 18, 2016 at 12:37:39 PM UTC-8, wrote:
Dave is indeed right, but that was not my point, just that the Eta did break up during spin tests.

If you want the whole story, here is the final investigation report:

http://www.bfu-web.de/EN/Publication...ublicationFile

Interesting read. What structural load factors do the sailplane designers use?