XC-99 gets a new motor thejivebombers US Air Force May 26, 2018April 28, 2020 1 Minute The one and only XC-99 decided to break at MacDill AFB in the late 40’s, and, as the photos illustrate, it took all hands to get the thing back in the air. A B-29 (44-62023) of MacDill’s 307th Bomb Wing is dwarfed by the broken down brute XC-99. Share this:TwitterFacebookLike this:Like Loading... Related Published by thejivebombers View all posts by thejivebombers Published May 26, 2018April 28, 2020