The Luscombe 11E Spartan 185 represents a late-20th-century effort to modernize the classic 1946 Luscombe Model 11A Sedan. Produced in Altus, Oklahoma, by Quartz Mountain Aerospace (formerly known as Luscombe Aircraft Corp.), the 11E was a heavily redesigned version of the original postwar taildragger. The redevelopment program began with a prototype, registered as N1674B, and a structural test fuselage was completed in December 1997. The aircraft received an initial type certification in November 1998 for marketing purposes, followed by full type certification on December 17, 2002.
Design changes focused on transforming the aircraft into a contemporary four-seat trainer and tourer. While maintaining the classic high-wing lines of the original Sedan, the 11E introduced a tricycle-gear landing gear system and a larger cabin. The interior was configured for a pilot and three passengers in side-by-side pairs, featuring dual controls and doors on both sides. A notable safety characteristic highlighted during FAA testing was the aircraft's extreme stall/spin resistance; testers reported that they were unable to cause the airplane to enter a spin condition despite exhaustive attempts.
Technically, the 11E is powered by a Teledyne Continental IO-360-ES4 piston engine. While the engine has a rated output of 157 kW (210 hp), it was derated to 138 kW (185 hp) for the Spartan 185. The standard propeller is a McCaulley 1B235/EFC7667 two-blade fixed-pitch metal unit, though a three-blade option was available on a proof-of-concept aircraft. Performance specifications include a maximum takeoff weight of 2,280 lb and a maximum speed of 157 knots. Cruise speeds vary by source, ranging from 115 knots in company advertising to 126 knots in technical listings. The aircraft has a stall speed of 48 knots and a rate of climb of 876 fpm.
Production was limited, with a planned start in April 2000 that slipped to early 2004. Although orders were believed to exceed 300 by late 1998, actual deliveries were few; only two aircraft were registered by October 2001, and 15 examples were registered in the U.S. by March 2011. The U.S. Civil Air Patrol was among the announced customers, reportedly ordering eight aircraft. Quartz Mountain Aerospace declared bankruptcy in November 2009, and its assets, including production certificates, were auctioned in 2011 to RA Lalli of Stratford, Connecticut.