Greetings The final accident report for the accident claiming an iconic KR-2 in South Africa and well known Pilot has been released.
http://www.caa.co.za/Latest%20Accident%20Reports/10061.pdf *Synopsis:* On Thursday afternoon, 28 October 2021, a pilot on-board a Rand KR-2 two-seat high-performance aircraft with registration ZS-UKU took off on a private flight from Kitty Hawk Aerodrome (FAKT), located south-east of Pretoria in Boschkop, Gauteng province, with the intention to return to the same aerodrome. Visual meteorological conditions (VMC) prevailed at the time of the flight. According to the first eyewitness, the aircraft entered the aerobatic box situated west of FAKT; thereafter, the pilot executed a few aerobatic-type manoeuvres before flying towards the south. The second eyewitness saw the aircraft overhead his house flying at an estimated height of 500 feet (ft) above ground level (AGL). The aircraft then made a high-speed left turn during which the right wing broke off in-flight. As a result, the pilot lost control of the aircraft and crashed at Tierpoort farm, approximately 0.57 nautical miles (nm) south of FAKT Runway 01. The aircraft was destroyed and the pilot was fatally injured during the accident. Post-accident examination of the failed right-wing aileron indicated that the right-wing separation was triggered by the aileron aerodynamic flutter which was caused by the aileron that was not balanced in accordance with (IAW) the Rand Robinson Engineering Build Manual. *Probable Cause: * The pilot lost control of the aircraft after the right-wing broke off in-flight due to the aileron aerodynamic flutter. *Contributing Factor:* The aileron was under balanced to the extent of 60 kilograms per millimetre (kg/mm) residual moment. *AVCom Forum Restoration discussion : * https://www.avcom.co.za/phpBB3/viewtopic.php?f=100&t=79408&start=105 A video that appears to be from about August 2021 that shows ZS-UKU in the configuration at the time of the incident : https://www.youtube.com/watch?v=sHeMbgoql2Y Regards שָׁלוֹם עֲלֵיכֶם (Shalom aleichem) Michael L Griffin [email protected] Fax : 086 733 0650 Cel : +27 83 462 0462 Please consider the environment before printing this email He who play in root, eventually kill tree. Linode Private Server :: http://goo.gl/OnpGMS EvE Online 21day trial :: http://goo.gl/TAZSJ8
-- KRnet mailing list [email protected] https://list.krnet.org/mailman/listinfo/krnet
