I figure I'll commit some of this research to a thread and eventually a knowledge base article. If nothing else, be entertained.
Osprey II
https://en.wikipedia.org/wiki/Osprey_Osprey_2
Let's start with the impetus for today's post, the Osprey II. Designed in the mid 1970s and sold as plans, which are still available for purchase I believe. Construction is wood and fabric. Commonly powered by 150hp O-320. Side by side with sticks.
The video interview with the designer from the 1980s is great:
It seems the builder community is alive and thriving. There's plenty of Youtube finds of current pilots operating these things. Unfortunately, it has a tail only a Maule owner could love. And the low wing just seems odd.
Volmer VJ-22 Sportsman
https://en.wikipedia.org/wiki/Volmer_VJ-22_Sportsman
Now we're talking. Designed in 1957, the Sportsman features a high wing and is intended to use Champ or Chief wings. Several results for currently flying aircraft on Youtube. Intended to use a 85hp engine.
Anderson Kingfisher
https://en.wikipedia.org/wiki/Anderson_Kingfisher
My guess is that after the war there were a lot of GA guys enamored with the look and functionality of the PBY Catalina. The Kingfisher is designed for the 115hp Lycoming O-235, and features the engine pylon much more forward than the other models. Interesting design.

The women talking in the background of this video cracks me up:
Taylor Coot
https://en.wikipedia.org/wiki/Taylor_Coot
The Taylor Coot was designed by Moulton Taylor, who apparently is famous for designing the Aerocar. I have admit, it's both cute and ugly. I see some clear inspiration for the Double Ender tail. Another low wing design, the sponsons are very low profile. A fellow named Richard Steeves in Wisconsin sells plans for the aircraft.
More models to add, but I will return to this topic later. There are types more on the ultralight/LSA end of the spectrum as well as some type certificated ones like the Thurston Teal.
Feel free to chime in.



