Built in 1910 by Jean-Marie Vasserot with the assistance of a carpenter named Louis Houard, who also designed the engine. There is apparently no evidence that it flew successfully, although it is reported by Opdycke to have flown 100 meters at the beach at Cesson on November 13, 1909 as the Vasserot-Delassor Monoplane. Opdycke was most likely mistaken; confusing it with Vasserot’s glider model which made several flights in 1909 from the cliffs at Cesson. M. Delassor is unknown at this time.