David/Tim:

Attached are a couple of photos of two pattern planes I saw in an Austin TX hobby shop (owned by Rich Schaffer) about 15 years ago. I took the photos because I liked the paint schemes and I was told that the planes used to belong to Chip Hyde. Last year at a pattern contest in Texas, I showed the photos to Chip. He confirmed that they were his planes and the ones which he flew in pattern in the late 1980's. The photo that Tim posted, if I recall Chip's comments correctly, is a Hipo Tipo. The second photo I have attached is of the other plane that Chip flew. Both planes were built for Chip by a gentleman by the name of Ron Gillman. At the time the planes were built Ron lived in Las Vegas and worked for Bill Bennet who owned Circus Circus (the hotel/casino and the hobby company). Chip was a sponsored pilot for Circus Circus and Bill Bennett had the planes built for Chip. I am not sure what the engines were but it appears as though they were not YS since there does not seem to be a hole in the top of the fuse to adjust the regulator. Might be a rear exhaust OS since my recollection of the time was that a number of the upper level flyers were flying OS 61's with rear exhaust. IF you look at the photo of the plane without the inverted engine (it is side mounted rear exhasut with the pipe extending down the right side of the fuse above the wing and appears to be the plane in the background of the photo Tim posted) you can see the last three digits of an AMA number (752). I don't know Chips AMA number but Steve Helms AMA was/is 13411 (see attached photo of Steve's Aurora from a 1987 pattern contest in Lancaster CA.).

I believe David is correct about the routing of the pipe inside the fuse.

Might consider making a post on the Patern thread (2 meter group) and ask Chip (screen name is Passport 1) about the planes.

Hope this helps
Ed