From Franklin D. Harris's book 'Introduction to Autogyros, Helicopters and Other V/STOL Aircraft, Vol I: Overview and Autogyros
I read "
The first milestone was reached by Juan de la Cierva with his successful
demonstration of the autogyro. This first successful rotorcraft was developed through a series
of trials and errors that began with an idea in 1919 [2]. After trying three distinct
configurations, Cierva succeeded, as he relates in references [3-5] with his Type 4 autogyro
shown in Fig. 1-1. This rotorcraft “was ready to be used in real flight, and on 17th January
1923, it flew [piloted by Cavalry Lieutenant Alejandro Gomez Spencer] right across the
aerodrome at Getafe [Spain] at a height of several meters.”
I read "
The first milestone was reached by Juan de la Cierva with his successful
demonstration of the autogyro. This first successful rotorcraft was developed through a series
of trials and errors that began with an idea in 1919 [2]. After trying three distinct
configurations, Cierva succeeded, as he relates in references [3-5] with his Type 4 autogyro
shown in Fig. 1-1. This rotorcraft “was ready to be used in real flight, and on 17th January
1923, it flew [piloted by Cavalry Lieutenant Alejandro Gomez Spencer] right across the
aerodrome at Getafe [Spain] at a height of several meters.”
