Possibly not many are familiar with the name Bob Dunham. But since I breought it up, and there were responses, I'll fill in a bit more.
Bob Dunham, of course, was best known for starting and operating Orbit R/C products.
He got into R/C, but he was first a C/.L flyer. I first met Bob in 1947. We were both charter members of a new model club called "South Gate Skylarks", located in (what other?) South Gate, CA, a suburb of south Los Angeles. Another charter member was Tom Lay Jr. Tom's dad and uncle were C/L flyers, too. Tom Lay Jr. was just 9 or 10 at the time, but he could fly control line.
Anyway, Bob Dunham flew mostly speed models in the late '40s, and did OK at stunt. In the mid '50s, Bob Dunham and I lived in Downey, CA about the time he began Orbit R/C. He got me to look at a design for R/C receiver and transmitter. I made some changes to his schematic diagram and I then built a receiver for testing. His transmitter design seemed solid, so I didn't try to change it.
By the time I had finished college and I moved away, I lost contact with Bob. When I finally wrote a letter many years later, his wife wrote back about his passing.