only one B-29 became the only bomber to become a jet ace

Although 57 Superfortresses were lost to enemy action, B-29 gunners are credited with 27 enemy kills. The most notable of these was the B-29 named Command Decision, with a record five MiG-15 kills; the world's only bomber "jet ace."

In addition to their five jet kills, the crew flew a total of 121 combat missions and dropped 2,500,000 millions pounds of bombs.

https://www.wearethemighty.com/articles/this-b-29-is-the-only-bomber-to-become-a-jet-ace