The 1750 Norelfe was based on the Matra-Cantinieau MC-101A, an earlier helicopter designed by Jean Cantinieau.
It had a single main rotor, with torque control through a movable duct at the end of the tailboom.
Powered by a Turbomeca Artouste turboshaft, the first of two Norelfes flew on 28 December 1954.
[1] Aerotécnica went on to produce a larger five-seat version, the Aerotécnica AC-14 which was used by the Ejército del Aire (Spanish Air Force).
Data from Jane's All the World's Aircraft 1958-59[2]General characteristics Performance