Chris, when I started this thread my initial question was about e-power and the cpa. Like most threads after the initial question is answered another question was asked which led us here.
I wasn’t thinking about the actual model designs but only when turnaround was implemented, which was in 1984, Yes it was the FAI class.

As far as the models go, and this only from my own personal view. I’m thinking more Ballistic than anything else;
but if it was designed originally for a 2 stroke I’m a fan, especially if it had trike gear. Years wise that’s way past 1984, design wise that is.

But again that doesn’t imply that I have any problem with any pattern plane design, and that applies even to the current F3A designs.

In essence a pattern plane is a tool to do a job.