Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Aer Lualdi L.55 was a prototype Italian helicopter, a development of the Lualdi-Tassotti ES 53 featuring a far more powerful engine, a 134 kW (180 hp) Lycoming O- 360. While the ES 53 had been purely experimental, the L.55 was Lualdi's first step towards a marketable aircraft.

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