Back in the early 70's I got tired of contest flying in Open Pylon and Fun Fly events and thought I would try contest Pattern flying. I always designed all of my model since I was about 10 years old. Designed and built a F-86 Pattern airplane, 72" wing span with the swept wings and inverted engine with the spinner at the radar dome. Flew very good, but after practicing a couple months, I just don't like having to fly the exact flight each time, I got bored, I like more of free style flying. One day I was taking the F-86 up very high and was diving it straight down with WOT on the Super Tiger engine running lots of nitro and pulling out inverted and going down the runway about 5' inverted and then back up and about the 4th time by flying buddy told me that I was going to pull the wings off. I laughed. The next time I started to pull out of the vertical dive inverted when the wing failed at the center section and each wing panel went back and crushed the rear of the fuselage. Had to dig the engine out of the ground. I hot wired the wing panels and was covered with 1/16" balsa with spruce spar caps in the foam. At the center section the spruce spar caps had 1/4" aircraft plywood on each side of the spruce spar caps out about 8" on each wing panel and the center section of the wing was fiber glassed 16" wide in the center. The wing failed in the center.
That was the last of the TLAR aircraft design.
I was going to build another F-86 with retract gear and that was before anyone had retract gear on their models, so I built my own along with a retract servo for the extra strength needed. Ended up doing some engineering work for Carl Goldberg in designing his first retract gear that he put on the market. The servo was also put on the market by another company, (Long story).
I have about 24 RC aircraft designs.