Sep 152014
Artwork showing the major Dyna Soar/Titan III contractors. The Titan IIIc show here includes the large pitch stabilization fins (and small yaw fins) attached to the solid rocket boosters. Not depicted are the thrust vector control fluid tanks. At the time, the fins were thought needed to counteract the pitch moment that would be produced by the wings of the spaceplane way up front. In the end, it was concluded that thrust vector control would be more than adequate for the task; and while the Titan IIIC never launched a Dyan Soar, it retained the TVC capabilities that were produced to deal with the Dyna Soar.
Much, much more on the Dyna Soar, including the final few Titan III variants, can be found in Aerospace Projects Review issue V3N4.