The Hanriot 1909 monoplane had an uncovered rectangular-section wire-braced wooden fuselage with deeply cambered parallel-chord wings.

The front struts terminated at the engine bearers, which were midway between the upper and lower longerons.

Two examples were shown at the Paris Aero Salon in October 1909 in an unfinished condition.

[2] One was successfully flown at Rheims in December 1909, first by Eugene Ruchonnet and afterwards by Rene Hanriot followed by his son Marcel, then aged 15.

[2] By the time that they were first flown Hanriot and Ruchonnet had already started work on a series of closely related monoplane designs, which were exhibited at the Salon d'Automobiles, d'Aeronautique, du Cycles et des Sports, which opened in Brussels on 16 January 1910.