The Model 60 was developed from advancements of the A-8 and the experimental YA-10. However, it became obsolete after a short use period, mainly because of fast-improving aviation technology, as well as the USAAC's desire for multi-engined attack aircraft. The most obvious difference between the A-12 and the A-8 is the air-cooled, radial engine in the A-12, which replaced the A-8's inline, water-cooled engine. This was a response to the USAAC's move toward a preference for radial engines, especially in attack aircraft. The rationale behind this preference is that the radial engine has a lower profile, making it less vulnerable to ground fire, and a simpler cooling mechanism, which is also less prone to groundfire, as well as overall maintenance problems.
These aircraft retained the open cockpit introduced in the A-8 production batch, and carried the same weapons load. In an attempt to improve pilot/observer co-operation, the rear cockpit was moved forward sufficiently for its glazed covering to form a continuation of the fuselage decking behind the pilot's cockpit. Nine USAAF A-12s were still in service at Hickam Field on 7 December 1941, but they saw no combat. Serial numbers: 33-212/257
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The MB-339 was developed during the 1970s in response to an Italian Air Force requirement that sought a replacement for the service's existing fleet of Aermacchi MB-326s.
An Aermacchi MB-339 jet had just taken off in formation to head to Vercelli, where it should have perform an aerial exhibition.
Learn all about the Aermacchi MB-339 with Curator of Aviation Eric Boehm.