It is manufactured in kit form for amateur construction, by Excalibur Aircraft of Sebring, Florida. It was introduced in 1993. The Excalibur is available in the US amateur-built and light-sport aircraft categories and in Canada in the amateur-built, BULA and AULA categories. In Europe it qualifies under the Fédération Aéronautique Internationale microlight rules. The Excalibur was designed as "clone" of the Quad City Challenger II aircraft. The company took the basic Challenger design and incorporated many changes, including mounting the engine upright allowing larger propellers and the Rotax gearbox to be mounted, lengthening the tailboom and enlarging the tail vertical surface to increase stability, shortening the ailerons and replacing control cables with torque tubes. The optional Dacron covering on the Challenger was replaced with Superflite standard aircraft fabric, the fuselage was lengthened to give more backseat room and the nosecone was reduced in size to provide better over-the-nose visibility. The design was also streamlined to reduce drag and round cross-section wing struts were replaced with aerodynamic extrusions. The Challenger's rigid landing gear was replaced with a bungee-suspended system. Regarding the landing gear improvements reviewer Andre Cliche, author of the Ultralight Aircraft Shopper's Guide, said: the Excalibur features a bungee suspension on mainwheels. That's an improvement over the Challenger whose rigid main gear tubes kinked too many times during rough landings. A suspension on mainwheels will certainly be appreciated by instructors who leave their machines in the hands of novice pilots. Build time; 100-200 hours, Field assembly time; 20 min. Variants Excalibur Basic model with 50 hp (37 kW) Rotax 503, 64 hp (48 kW) Rotax 582, 70 hp (52 kW) Hirth 3503, 65 hp (48 kW) Hirth 3203 or the 55 hp (41 kW) Hirth 3202 two-stroke engines. 750 completed and flown by the end of 2011.[5][6][10] Excalibur Four Stroke Model with HKS 700E 60 hp (45 kW) or 80 hp (60 kW) Jabiru 2200 80 hp (60 kW) four-stroke engines. 400 completed and flown by the end of 2011.[5][6][10] Excalibur Wide Body (Stretch) Model with wider fuselage, also called the Excalibur Stretch. 750 completed and flown by the end of 2011.
