The Folkerts SK-2, also known as Speed King Two, "Toots" and "Miss Detroit" was a racer built for the 1936 National Air Races.

Clayton Folkerts designed his second racer, the SK-2 Toots after leaving the Mono-Aircraft Company, and Waco.

Steve Wittman survived a flight in the SK-2 with a ruptured gas tank that leaked into the cockpit.

In St. Louis, pilot Roger Don Rae landed gear up, badly damaging the aircraft.

[3] The cause was undetermined, but fellow racing pilots blamed the heavy locking mechanism for the landing gear as a contributing distraction in high-speed low level flight.