The SNCASE SE-3110 or Sud-Est SE-3110 was a French two seat experimental helicopter with unusual twin, angled tail rotors, first flown in 1950.
The SE-3110 drew heavily on the design and development of the 1948 SE-3101, sharing much of the latter's control system and also its unusual twin tail rotors.
A 149 kW (200 hp) Salmson 9 Nh nine cylinder, air-cooled radial engine was mounted horizontally under a transmission box attached to the fuselage by steel tubes and driving a three-blade rotor.
The SE-3110 landed on small wheels mounted on cantilever legs on each side and a long, forward-pointing, sprung skid.
[3] However, other sources say that two SE-3110s were built, appearing on the French civil register initially as F-WFUD and F-WFUE, later transferring to the B list (after gaining their Certificates of Airworthiness) as F-BFUD and F-BFUE.