Model Variants (Including Prototypes)
F-102B - Initial designation; redesignated to YF-106.
YF-106A - Two prototypes produced based on the F-102; new more powerful Pratt & Whitney J75 engine with afterburning; redesigned air intakes and engine exhaust system; lengthened fuselage.
F-106A - Initial production model designation; single-seat interceptor; 277 examples produced.
F-106B - Two-seat conversion trainer variant retaining combat capabilities; redesigned forward fuselage; reduced performance; 63 examples produced.
F-106C - Proposed advanced interceptor; fitting AN/ASG-18 series radar system in enlarged and elongated nose cone assembly; cancelled.
F-106D - Proposed two-seat trainer/combat capable version of the F-106C.
F-106X - Proposed interceptor to counter Lockheed YF-12 proposal; fitted with JT4B-22 series turbojet engine and canards.
F-106E - Proposed improved F-106; lengthened nose cone assembly with new improved radar system; never accepted.
F-106F - Proposed conversion trainer/combat capable variant of F-106E.
NF-106B - F-106B production aircraft leased to NASA for research purposes; active until 1991.
QF-106 - Aerial Target Drone for USAF training; conversions of existing F-106 stocks.