XB-58 Prototype; 2 built
YB-58A Pre-production trials aircraft; 28 built (11 plus the 17 RB-58A http://www.uswarplanes.net/b58.html )
B-58A Production model; 86 built plus 10 converted from YB-58A airframes
NB-58A Modified airframe used to test the J-93 turbojet engine being developed for the XB-70 bomber, the J-93 being carried in a nacelle beneath the fuselage; 1 converted
RB-58A Reconnaissance model re-built from YB-58A airframes; 17 converted
TB-58A Pilot trainer modified from XB-58 and YB-58A airframes, featured a raised seat in the second cockpit for instructor visibility; 8 converted
B-58B Proposed improved model; not built
B-58C Proposed improved model; not built
http://www.aerospaceweb.org/aircraft/bomber/b58/
XB-58 1956 = Four GE J79-GE-1; ff: 11/11/56 (p: Beryl A Erickson). POP: 2 [56-0660/0661]. The latter’s ff: 2/1/57 (>2/16/57) was first with a weapons pod (p: Erickson).
http://www.aerofiles.com/_convair.html
On november the 11th 1956, 55-0660 made its maiden flight, taking off from the Convair Fort Worth facilities at Carswell AFB, Texas. The underfuselage pod was not fitted, the maximum speed reached on the first flight was Mach 0.9.
http://www.xs4all.nl/~mvburen/b-58/fs1b.htm
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