FYI back when I was farming out in the minnesota sticks there were 3 local planes that I saw regularly.
All 3 were painted yellow, and roughly the same size.
1 was a stearman rigged as a cropduster,
1 was an aircat again as a cropduster.
1 was my buddy's light plane.
At 3 miles I had NO problem telling the 3 apart. The stearman I could maybe tell at 4 miles due to the bigwing.
Granted those are 3 very different looking planes, it would be tougher if the planes were harder to distinguish.
But then my life didn't depend on it either.
