In 1946, Don Luscombe introduced the four-place model 11, designed to specifications produced by the Flying Farmers of America. This was designed as a combined family/business aircraft, capable of carrying four people. With the back seat removed, up to six milk cans could be carried. Eventually, the Flying Farmer market proved to be a myth, so the Model 11 Sedan was finished with a more upmarket interior to appeal to the businessman. Certification was accomplished in May 1948. 38 examples remained on the U.S. civil aircraft register in August 2010.
The model 11A was reworked into the model 11E by engineers at the Luscombe Aircraft Corporation (later renamed to Quartz Mountain Aerospace after learning that the DLAHF had trademarked the Luscombe name). The 11E model features tri-gear landing and an 185 hp (138 kW) Continental IO-360. Quartz Mountain Aerospace produced the 11E in Altus, Oklahoma until they declared bankruptcy in November 2009. There are 15 examples registered in the U.S. civil aircraft register as of March 2011. The remaining assets of Quartz Mountain Aerospace were auctioned in 2011 to RA Lalli, based in Stratford, Conn., including the type certificate, 7 completed aircraft, and a large amount of spares. As fabricators and suppliers of aircraft parts to several major North American companies, RA Lalli was the successful bidder for the airplane's Federal Aviation Administration type certificate. Geza Scap, president of JGS Properties, purchased the Luscombe type certificate because he is interested in manufacturing the plane.