Hi Richard, Virginian,
Very interesting, Richard. It was on my 5th take-off that my F6 met its demise! All checked out pre-flight, the usual wiggling and touching to have confidence that all was snug. Lift off was norman, then sudden flutter of the elevators followed by an abrupt dive to the ground.
All was reassembled post-crash and very carefully examined. Xmtr/receiver links were solid, all servos OTHER than elevator operated normally to xmtr command. Elevator servo gears were stripped, symptomatic of flutter. Elevator pushrods had been checked before-no undo slop or flexing.
Findings: Uncertain. Lots ruled out, little resolved. Very similar to war-time flutter crashes, especially of the Curtiss SB2c. I have had other meetings with the flutter devil -a Giant Sweet and Low had springy pushrods but I have long since avoided that problem. Perhaps the OS 1.08 overpowered the airframe, just don't know. I fly lots of different models, no problems like this.
Bumer!!
hookem