Enrico Forlanini was an inventor of a steam-driven helicopter. Without crew and as a test, it had a rotor of 2.80 meters weighing little more than 3.5 kg, of which the motor weighed 1.6 kg. of which 1 kg was water.
 

"Enrico Forlanini -1948-1930"

-The tests of his machine were made in 1877, in Alexandria, near Milan.

"Steam engine"

-As we see the engine had two cylinders on both sides of a frame.

-The first test on June 29 was unsuccessful, although a little later it rose 13 meters. IF made its V-1 engine for the 2nd airship.

From Appendix 9: Italian pioneer, Enrico Forlanini already made a flying machine (helicopter type, see main text) around 1877. Steam engines with two V-cylinders and with horizontally-opposed cylinders in 1884.

-Finally, thinking about the use on an airship, in 1905, he presented another two-cylinder engine, running on steam.

-It is exhibited in the Museum of Science in Milan (Deposit of the collection of the Soc. Leonardo da Vinci)

"Two-cylinder steam engine in V at 90°"

"Possible boiler designed for Forlanini's 2V engine"

-Quick steam boiler with destination to a possible airship in the year 1905. It is exposed in the same museum in deposit of the same company of the previous engine.

From Appendix 12: In the museum of science and technology "Leonardo da Vinci" in Milan, a boiler, designed by Enrico Forlanini in 1877, is exhibited to produce steam for the airship that he designed as well.

"Forlanini boiler to produce steam"