Pushing lightweigth rc glider to its limits
Channel: Rc Soaring
Date: 2019-09-16

Doing some unusual hard G-force aerobatics with powered soaring sailplane built for slow thermal soaring. Excellent performance and control in a wide flight envelope seduced me to push it further to its structural limits. The Q12 handled these loads multiple times without any damage. The video though shows only a compilation of one flight. 

Model: Q12 - F5J glider from Hořejší (http://www.horejsi.cz)
Modifications of stock model: Full steel wing joiner (+14 gr), ballast in fuselage (+70 gr, removable)
All over weight (setup in video): 630 gr
Wing area: 32 dm2
Wing load (setup in video): 19,5 gr/dm2
Possible setups with ballst systems: 546 gr to 735 gr
Wingspan: 2 m
Battery: 2s -1200 mAh

Q12 building and discussion forum: http://www.rc-network.de/forum/showthread.php/359287-Q12-von-Ho%C5%99ej%C5%A1%C3%AD

Thank you Ivan Hořejší for this beautiful designed, superbly built and still affordable rc model and deep respect to Mark Drela for developing this sublime performing airfoils and model concepts!