[1] The R-6 eightball had smooth plywood skins painted light blue with a large eight ball on each side.

The R-6 is a single place, all-wood low-wing monoplane with retractable landing gear.

[3] For the 1939 races, a new wing was installed that was nearly elliptical in shape and a light weight worm-gear manually retractable mechanism replaced the hydraulics.

[4] The Eight Ball was restored and is on display at the Planes of Fame museum in Chino, California, along with the R-4 Firecracker.

[7] In 1991, the R-6 was displayed at the EAA Airshow in Oshkosh, Wisconsin as part of a "Golden Age of Air Racing" program.