invertedflyer
500 ft. from said obstacle
A hop I went up on after a familiarization flight out at March ARB Aero Club ... ignore the USAF folks.. it should read U-S-M-C, I gotta talk to maintenance about that one ;-) If by chance you attend the yearly Riverside Airshow these guys will be there doing formation stuff
http://www.patricksaviation.com/videos.php?action=view&id=487
http://www.patricksaviation.com/videos.php?action=view&id=487