Here is one I need some help on. The photos are of my pattern plane that I flew in Sportsman (now called Intermediate) pattern in 1992. I believe that it was a Challenge 4. I bought it from a pattern pilot in Denver (believe his name was George Eide). I had an OS 61 rear exhaust (same engine I had in my Tipo - red/black plane in previous post). Flew really well and was very light (about 7.5 lbs RTF). All built up construction. Open pipe on bottom (no pipe tunnel). One piece wing.

My question is: Is this a Challenge 4 or is it a Conquest?

The third photo is of Steve Helms Aurora. I am not exactly sure when this was taken but I believe it was in 1986 or 87 and I believe it was taken in southern CA (possibly Lancaster) but not sure. Maybe Mile Square.

Ed