Model Variants (Including Prototypes)
L-39 Base Series Designation
L-39X - Prototype models; five built with two static airframes.
L-39C - Basic Two-Seat Unarmed Trainer
L-39CM - Upgraded C-models for Slovakian Air Force
L-39V - Target Tug for Czechoslovakian Air Force
L-39Z0 - Armed Weapons Trainer; fitted with reinforced wings and four underwing hardpoints.
L-39ZA - Based on the L-39 Z0; reinforced undercarriage; provision for reconnaissance pod; increased ordnance load.
L-39ZA/ART - Thailand Export Model; fitted with Israeli-produced Elbit-brand avionics system; 40 examples.
L-139 "Albatross 2000" - Proposed Export Model; fitted with TFE731 turbofan engine generating 4,080 lbs of thrust; avionics by Bendix/King; single prototype completed.
L-59 - Based on the L-39; fitted with uprated powerplant, avionics and a strengthened fuselage.
L-159 - Evolved L-39 form