B-29 #800 with X-1B attached taxi’s in off of the lakebed.April 9, 1958 Published on October 7, 2012 in 8 October 1954Full resolution (1280 × 1242) ← Previous Next → NACA 800, a modified Boeing B-29 Superfortress, with the Bell X-1B loaded into the bomb bay. (NASA)