One of two YB-60's built at the Fort Worth Convair plant. One was completed and was flown, the other was never finished
and both were scrapped after losing the competition for an all-jet heavy bomber to the B-52. The YB-60 was 72% B-36.
The problem of increasing B-36 speed had led Convair engineers to develop a swept-wing configuration in 1950.
A wider center chord on the new wing increased the wing area to 5,239 sq. ft. Eight Pratt & Whitney XJ-57-P-3 turbo-jets, 8,700 lb. thrust each,
were paired in four pods. Crew requirements were then limited to five men, all in the forward pressurized compartment.
A retractable tail wheel was added to balance load changes. In spite of an impressive improvement over the performance of the B-36,
the YB-60 was inferior in most respects to the Boeing B-52.