Model Variants (Including Prototypes)
XF-89 - Initial prototype; fitted with Allison J-35-A-9 series engines of 4,000lbs thrust.
XF-89A - Second prototype with J-35-A-21A engine of 5,100lbs thrust; 6 x 20mm internal cannons added.
F-89A - Initial production variant; evaluation models numbering eight total examples; modified tailplanes.
F-89B - Second production mark; upgraded avionics suite; 40 examples produced, limited by engine issues.
F-89C - Third production mark; fitted with J-35-A-21 / -33 series engines of 5,600lbs thrust; production limited to 164 examples.
YF-89D - F-89B production model with new avionics and armament package.
F-89D - Definitive F-89 mark based on YF-89D prototype; sans 6 x 20mm internal cannons; wingpods fitting 104 x rockets; Hughes E-6 fire control system; AN/APG-40 series radar coupled to AN/APA-84 computer system; 682 examples produced.
YF-89E - Developmental testbed from F-89C production model for Allison YJ71-A-3 engine of 7,000lbs thrust.
F-89F - Proposed variant fitting J71 engine with new fuselage design and wing assemblies; not selected for serial production.
F-89G - Proposed improved F-89 with Hughes MA-1 fire control system with support for GAR-1/-2 Falcon air-to-air missiles.
YF-89H - Three F-89D converted testbed airframes.
F-89H - Fitted with E-9 fire control system; support for 6 x GAR-1/-2 Falcon air-to-air missiles with 42 x FFAR; 156 examples produced.
F-89J - Final F-89 variant; F-89D conversions with support for 2 x MB-1 Genie nuclear rockets with 4 x Falcon air-to-air missiles; 350 conversions from F-89D production models.
DF-89A - F-89A production models modified as aerial drones.
DF-89B - F-89B production models modified as aerial drones.