The entire plane was fabric covered, except the 283 kW (380 hp) Gnome-Rhône 9A Jupiter engine, which was left uncowled.

They had a larger 313 kW (420 hp) Jupiter, steel spars instead of wood, and stronger struts, allowing for shipboard catapult launching.

After successfully testing the L-3, the French navy ordered 14 production GL-810 HY aircraft.

The first production 810 HY flew on 23 September 1930, taking off from the Seine at Les Mureaux.

Data from The Encyclopedia of World Aircraft,[5] Aviafrance : Gourdou Leseurre GL-812 HY[3]General characteristics Performance Armament