In this paper, the authors want to present a few more distinct aircraft from a constructive and functional point of view.
Such ships will also be built in the future more and more often in order to be able to respond to all new flight requirements and to meet, under optimal conditions, the new and increasingly demanding requirements (Aversa et al., 2016 a-o, 2017 a-e).
Many of the new special aircraft have been built so far to achieve special tasks, or at the request of the defense ministry in some highly developed countries, even with the United States of America (Mirsayar et al., 2017).
Methods and Materials
The PA-23 was the first twin-engine design from Piper and was developed from a proposed “Twin Stinson” design inherited when Piper bought the Stinson Division of the Consolidated Vultee Aircraft Corporation.
The prototype PA-23 was a four-seater low-wing all-metal monoplane with a twin tail, powered by a two 125 hp Lycoming O-290-D piston engines the prototype first flew 2 March 1952. The aircraft performed badly and it was redesigned with a single vertical stabilizer and an all-metal rear fuselage and more powerful 150 hp Lycoming O-320-A engines.