The Avro Arrow was a cool plane, but contra my Canadian aerospace nerd pals, it really wasn't all that impressive. It was a pretty typical interceptor design of its day; interceptors basically fell out of fashion for obvious reasons -the Soviets never really developed a proper intercontinental bomber fleet, let alone a supersonic intercontinental bomber fleet, and the ICBM and SAM kind of made bombers expensive and irrelevant anyway in comparison. The last US designed interceptor ... arguably the A-5 Vigilante[1] (otherwise the F106 Delta Dagger[2]), and arguably pretty equivalent to the Avro Arrow. The F108 Rapier[3] concept was also interesting; many of its guts ended up in later planes like the Vigilante or SR-71.
It's amusing that the Soviets kept development of the interceptor for their PVO-Strany; coming up with very impressive aircraft which have no equivalence class in the West.
Anyway too bad Canadian aerospace didn't continue, but had they developed the thing, it wouldn't have been very useful.
The biggest contribution by interceptors was arguably the MiG 25 which was badly misinterpreted by western analysts, prompting the creation of the F-15 to counter the perceived threat.
Wouldn't the last US interceptor be the YF-12? Even if it was cancelled, it at least made it through flight and missile testing... (The YF-12 took the missile and radar developed for the XF-108 and stuck it into the CIA's new recon plane, the A-12, which worked well enough for the USAF to ask for a production run)
It's amusing that the Soviets kept development of the interceptor for their PVO-Strany; coming up with very impressive aircraft which have no equivalence class in the West.
Anyway too bad Canadian aerospace didn't continue, but had they developed the thing, it wouldn't have been very useful.
[1]https://en.wikipedia.org/wiki/North_American_A-5_Vigilante
[2] https://en.wikipedia.org/wiki/Convair_F-106_Delta_Dart
[3] https://en.wikipedia.org/wiki/North_American_XF-108_Rapier