The MB-339 is of conventional configuration, and shares much of the 326's airframe. It has a low, un-swept wing with tip tanks and jet intakes in the roots, tricycle undercarriage, and accommodation for the student and instructor in tandem. The most significant revision was a redesign of the forward fuselage to raise the instructor's seat to allow visibility over and past the student pilot's head.The first flight took place on 12 August 1976 and deliveries to the Italian Air Force commenced in 1979. Still in production in 2004 in an enhanced version with a much-modernized cockpit. Over 200 MB-339s have been built, with roughly half of them going to the Italian Air Force. Airworld designed this 1:3.6 scale kit with competition use in mind. In spite of being over 118 inches long and 110 inches in wingspan they were able to keep the plane below 44 pounds. This was possible due to the extensive use of modern vaccuum-sandwich building techniques as well as splitting the wing in three section while incorporating a build-in airduct. Thomas Gleissner flew this plane at the 2009 Jet World Masters in Israel and placed in the Top 3.