Looks like the Ka7 might become the new Blanik.

http://www.myplainview.com/news/arti...9bb2963f4.html

According to the accident report for the 2004 accident referred to in this article, glue failure in the wing was dismissed as a reason for the wing failure. There was, however, an small glue failure in the left elevator that could have led to loss of control in pitch. The wing failure happened where the lower spar boom suffered first compression damage, then failed in tension, initiating the failure of the upper spar boom by bending. This compression damage could have occured in flight, by flying outside the flight envelope of the glider. It could not be established if this happened through loss of control due to elevator problems, or by voluntary maneuvres. The pilots had been discussing planned aerobatics before the flight, but the failure occured at the very beginning of the flight, during rolling maneuvres. Another possibility was that the compression damage occured during a heavy landing or the aircraft's recent excursion over rough ground that necessitated repairs to the steel tubing in the fuselage.

The complete report is available on the BGA website, but it is password protected. However, the Air Accidents Investigation Branch give the link, username and password on their links page: http://www.aaib.gov.uk/links/index.cfm

Look for report date: 25-11-2005