This is a list of failed launches of rockets in the Thor and Delta rocket family. The Thor and Delta family rockets have had 51 complete failures, 10 partial failures, and 1 partial success, for a total of 62 unsuccessful Thor and Delta family missions. Since it has had 768 launches, this gives it a reliability of 91.9%, which puts it within the average range for rockets that started around the space age.[1]
- ^ Romanova, N.; Crosby, N.; Pilipenko, V. (2013-05-28). "Relationship of Worldwide Rocket Launch Crashes with Geophysical Parameters". International Journal of Geophysics. 2013: e297310. doi:10.1155/2013/297310. ISSN 1687-885X.