[kach22i]

Douglas XB-42 Mixmaster - Wikipedia, the free encyclopedia

The twin bubble canopies proved a bad idea as communications were adversely affected and a single bubble canopy was substituted after the first flight.[4]

http://en.wikipedia.org/wiki/Douglas_XB-43_Jetmaster



http://en.wikipedia.org/wiki/Douglas_X-3_Stiletto


http://www.personal.kent.edu/~ccarey/pages/Bombers.htm



http://commons.wikimedia.org/wiki/File:Martin_XB-51_formation_takeoff_or_low-level_pass_061026-F-1234S-015.jpg