F-101 was Voodoo.
F-102 was the Delta Dagger.
F-103. Republic design, never built. Looks ike a cruise missile. From the web: http://www.geocities.co.jp/HeartLand-Icho/3902/jf/jf_e_century.html
It was an up-too-date jet fighter. Pilot needed to watcth periscope to see forward. Only little skylights attached for see upward, or to soften closed and tight feeling. Material of body mainly used by titanium. Powered by turbo-ram-jet engine for over mach 3 speed in high altitude.
By the reason of too reckless spec, exploration cost raised awfully. And the comparison of SAM with F-103, SAM estimated better cost performance than F-103. So this project cancelled at mockup stage, August 1957. Interceptor requirement assigned by F-102, a rather conventional airplane compared to the F-103, as planned from the beginning.
Span:10.92m Length:24.89m Height:5.59m Weight max40t Engine Xj-67-W-1 turbo_ramjet 15,000lbs/18,800lbs Cf:kl Vmax M=3+ Vc=M=2.2/75,000ft Combat Radius:400nm Armament:Falcon AAM*6 FFAR(MightyMouse)*36
F-104 was Starfighter.
“Thud” was a Thunderchief F-105, USAF bomber-fighter (almost always serving in the bomber role) in Vietnam & overseas.
F-106 was Delta Dart.
F-106 was derived from the F-102 - 102 was harder to handle, slightly slower and shorter range. Pretty dangerous to fly - about 28% were lost in crashes/ejection seat “landings” over the plane’s lifetime.
Obviously, 27% of all flights didn’t result in a loss, but over time, more pilots were lost in “routine” fighter delta-wing training missions than in delta-wing combat.
That is slightly misleading - since the delta wings served in Europe & east coast/far north ops against the bomber threat, rather than close air support in Vietnam, but still....