My first free flight was a Veco Sioux. Impressed by a friend's free flight (Brigadeer?) in 1956, I built a Veco Sioux...couldn't believe it could just circle and circle until it went out of sight!
I waited for what seemed like hours, never saw it again.
My brother-in-law and nephew built a Sioux from an old kit in 1974, flew it at Campbell High school. It began its clockwise descent, but changed course...flew west, toward the Perc ponds adjacent to Highway 17...they chased it, but it seemed to go down somewhere west of Campbell township.
Brother in law drove around for days, finally drove down an obscure commercial alley and found it inside a construction yard! Just sitting there... no damage!