These aircraft are rumored to be a part of the "Aurora" project.  The name "Aurora" came about from a 1986 Pentagon Budget document and was slotted to recieve a large sum of money. The project is suspected to contain two aircraft: a large SST that is the first stage of a two-stage aircraft/satellite launcher possibly developed following the Challenger explosion in 1986, and a smaller triangular HST that has been even more reported and speculated about.  It is said to be the most remarkable flying machine ever built and is seen as the epitome of a century of aerospace development!  I originally did this project for FS5 when I noticed an article in Popular Science in 1993 and later on bought the XR-7 Thunderdart plastic model kit (based on Aurora) by Testers Corp. Testors also made the SR-75 Penetrator model kit which is what my version is somewhat based upon. Since the true designations and confirmed existence are unknown, I used the same numbers as the kits since they make some sense, however those silly names will NOT be used. Since this is the largest project I have ever done, and all previous sims couldn't allow for the planes to be done properly it has taken several years of spare time to get to this point, therefore I have broken it down into several parts.  The two main sections will deal with each aircraft:

          


 


The model kits