At the Club 40 race in Hico this weekend, they tried something different to identify airplanes. Instead of the standard NMPRA high/low, red/ green system, they simply added blue and yellow to the mix and had 4 different colors. This worked quite well and according to the cut judges were very easy to see. The only problem from my point of view is the use of water-based "Tempra" paint instead of the Uline 5x7 inventory stickers. BTW, Uline makes stickers in many different colors.
So it got me wondering, just where the 2-color system came from. I remember as a kid watching Formula One and the plane identification to the cut judges. It was probably pretty tough for them to keep track of all the beautiful airplanes with similar paint jobs, so I can easily see why the colored wing markers came to be, but why only 2 colors instead of 4? Are there any "old hands" out there that can shed some light on the history of the wing markings.