DANG!!! Doc, you're good.. Yep, that's a Ringmaster, built entirely from a recent kit (I forget the mfg's name). I helped my grandson build it in 2003. He was about 8 at the time. Mods?? We reversed the wing tips for ease of covering.
As for the big yellow one. It's the third in a series of 4 Windwalkers I built back in the eighty's. The first 2 were 35 size models built around a Gieseke Nobler wing. I bought the kits and used only the wing. This one was built in 1981 around a Bob Hunt foam wing. The finish is 100% Sig dope applied over silkspan. The wing, flaps, and stab are all foam. Initially, the elevators were also foam, but flexed and fluttered a lot, so I replaced them with units constructed from balsa/ spruce covered with silkspan. The stab also flexed quite a bit so I installed a 1/4 inch diameter aluminum tube spar just in front of the hingeline. This Windwalker has a wingspan of 61 inches and weighs a hefty 58 oz. It's powered by an O.S. Max 45 FSR built by George Aldrich. The prop in the photo is an unmodified Zinger "Special Pro" 13-6 .Don Still was instrumental in connecting me with George.
The model DOES NOT suffer from a lack of line tension. I fly it on .021 lines that are 69 1/2 feet from handle to spinner. This allows the model to fly a faster air speed while maintaining lap speeds in the 5.2 - 5.5 sec. area. The longer lines allow for a larger "maneuver envelope", which gives the illusion of slow flight speeds and smooth maneuver shapes. I placed well in numerous local contests flying this "tub o' Lard"...
The last Windwalker in a series of 4 was built in 1984.. Tom Farmer guided me through the construction of the wing. The model was an I-beam, 64 1/2 inch spanned wing that came in at 48 0z (the completed model, not the wing). By that time, my vertigo was getting so bad that I couldn't fly well enough to be competitive. I never finished flight trimming it. It hung on the wall for several years until around 1993 when I gave it to my flight coach, Lewis Sherman.. He still has it but I don't think he's ever flown it..
Does anyone recognize the muffler? (Hint) The builder was a school teacher who regularly competed at the Nats..
As for the handle. The wooden part is made from "cabinet grade" oak. The other parts are machined from 6061-T6 aluminum bar stock.
Nick Gans