The F12A is a development of the Falconar F11 Sporty, which is, in turn, a variant of the Jodel D11. Falconar indicates that it incorporates a larger cockpit, simplified fittings, shoulder harnesses and aerodynamic improvements to improve stall characteristics over the Jodel design.[5]
Hans Teijgeler of Jodel.com says that the F12A varies from the D11 by using a new wing design, with new simplified spar and rib design and the dihedral point moved inboard, allowing the outer portion to fold for ground transport or storage, but at the cost of added weight, plus the option of a third seat. Teijgeler describes the wing as "less efficient". Teijgeler also notes that the F12 uses much larger and heavier engines with higher fuel consumption. Teijgeler says of the Falconar F12, "the Falconar 'Jodel' should not be looked upon as a Jodel, but as a Falconar. This is [n]either good or bad. Just a fact to take into account"[6]
The aircraft is made from wood, with its flying surfaces covered in dopedaircraft fabric. Its 28ft (8.5m) span wing has an area of 140sqft (13m2) and optionally can mount flaps. The aircraft's recommended engine power is 150 to 180hp (112 to 134kW) and engines that have been used include the 150hp (112kW)Lycoming O-320 and the 180hp (134kW)Lycoming O-360four-stroke powerplants. Construction time from the supplied kit is 1200 hours.[1][2]