Piper PA-48 Enforcer at the US Air Force Museum, Dayton, Ohio
The Piper PA-48 Enforcer was a turboprop powered light close air support/ground-attack aircraft built by Piper Aircraft Corp. Lakeland, Florida. It was the ultimate development of the original World War II North American P-51 Mustang. The Enforcer concept was originally created and flown by David Lindsay, owner of Cavalier Aircraft, in response to the United States Air Force PAVE COIN program, but Cavalier did not have the political clout or manufacturing abilities to mass-produce the Enforcer, so the program was sold to Piper by Lindsay in 1970.
In 1971, Piper built two Enforcers by heavily modifying two existing Mustang airframes, fitting them with Lycoming YT55-L-9A turboprop engines along with numerous other significant modifications. One airframe was a single seat (called the PE-1 and FAA registered as N201PE), the other a dual-control aircraft (the PE-2, registered N202PE). Prior to the Pave COIN evaluation, N202PE was lost in a crash off the Florida coast on 12 July 1971 due to flutter caused by a Piper-modified elevator trim tab. Although the Enforcer performed well in the 1971–1972 Pave COIN test flown by USAF pilots, Piper failed to secure a USAF contract.
Flyvertosset's Aviation Blog