Few aircraft families show a clearer evolutionary line. Lockheed’s P-80 Shooting Star was the first US jet fighter to see operational service. Stretched into a two-seat trainer it became the T-33 (originally the TF-80C), one of the most widely built jet trainers in history. When the Air Force needed a radar-equipped night fighter in a hurry, Lockheed reached for that same airframe again, converting two TF-80C trainers into interceptor prototypes with a lengthened nose for radar and fire control.

Reusing a proven airframe drastically shortened development and cost — but it also set limits. The F-94 inherited a design conceived as a fighter-trainer, not a purpose-built interceptor, which is part of why the definitive F-94C ended up with a new wing, a new tail and a new engine to wring more performance from the concept. The trade was speed of fielding against ultimate capability, and in 1949–50 speed of fielding was what the USAF needed most.

The F-94C’s armament reflected a very 1950s idea about killing bombers. Instead of aiming guns or early guided missiles, the interceptor would be steered by its radar into a firing position and then loose a salvo of unguided 2.75-inch rockets in a spreading pattern, trusting probability rather than precision. Twenty-four rockets sat in a ring around the nose radar behind retractable doors; when required, two mid-wing pods added another twenty-four.

In practice the concept had drawbacks — firing the nose rockets could disturb the radar and briefly blind the crew with smoke and flame — and guided air-to-air missiles soon made the unguided salvo obsolete. But at the time it represented the leading edge of automated, radar-directed interception, and the Starfire was the first US aircraft built around the idea from the outset.

The F-94A and F-94B were close to the trainer they came from: an afterburning Allison J33, a Hughes E-1 fire-control system and four .50-calibre nose guns. The F-94B added improved instrument-landing and navigation gear, making it a better all-weather machine, and it was the F-94B that carried the type into combat over Korea.

Ten/Ta/To F-94C was effectively a new aircraft on the same theme. Company-funded and first designated F-97, it introduced the thin wing, the swept tail, the Pratt & Whitney J48 engine and the all-rocket armament. Around 387 F-94Cs were built out of roughly 855 Starfires of all types, and it was the F-94C that most people picture when they think of the Starfire.

The Starfire was a government procurement of the early 1950s, and no precise modern-style flyaway price is published for it. Because it was derived from the existing T-33 airframe, it was relatively economical to develop compared with a clean-sheet interceptor — one of the main reasons the Air Force chose the design when it needed an all-weather capability quickly. Any single dollar figure for the type should be read as an order-of-magnitude estimate rather than a sourced flyaway cost.

No reliable public cost-per-flight-hour number exists for the F-94. As with most first-generation Cold War interceptors, operating-cost data was never published in a form comparable to modern figures, so any precise dollar-per-hour claim is effectively a guess.