Jim, I wasn't born until 48 and into modeling glow powered planes until 56, free flight in 60 and even then things were changing really fast. There are a lot of items I saw but never understood. Ignition engines were still being used but were fazing out really fast. I'm glad we no longer have to crank up rubber bands and count the knots to fly RC these days. Out on the lake bed there are still a lot of free flights and they have a huge contest every other year out there and I see a lot of the old systems but the free flight guys aren't all that frendly and shun the RC guys so they don't like a lot of stupid questions from us.