<p>As I understood it, the jet engines were for the test vehicle which used to be called the Buran analogue. The flight vehicle did not use them as evidenced by the liftoff and landing photos. As far as turbojets rather than SSME. The Buran had no main engines attached because the Energia core vehicle had them. The turbojets would be of little value during launch.</p><p>The only purpose having turbojets available at liftoff that I can see is in the event of an RTLS where the turbojets could mean the difference between the orbiter falling short of the runway and making it to the runway.</p><p>The engines were basically designed to do for Buran what the NASA SCA did for our shuttle. At the time the Buran analogue was being tested (1985). There was no carrier aircraft available to airdrop or transport the Buran orbiter in one piece.</p><p>The Myasischev M-4 bomber was initially used to transport Buran minus its rudder before the AN225 became available. The Antonov AN225 Dream became available some 3 years after the airborne tests.</p><p>I don't think the engines would allow Buran to travel great distance. Only enough to get it airborne, fly for a bit and return. Keeping in mind the shuttle and Buran orbiter designs are poor aerodynamically for the purpose of sustained atmospheric flight.</p><p>The jet engines theoretically would have enabled Buran to land safely in the event of a problem on re-entry where it could be ascertained that the orbiter was going to fall short of the runway. In early U.S. shuttle studies, jet engines were considered particularly as a way to provide go around capability should a missed approach occur during landing.</p><p>The drawback is of course, the amount of payload capacity traded off which is why our shuttle, and even Buran...ultimately did not use jet engines on the orbiters. I do think the way Burans jets were designed that with thermal protection, they would be okay during reentry. The only potential problem being what to do about the intake openings.</p><p>Your right, Our Ares V is indeed pretty much an Energia class lifter. The Energia actually demonstrated shuttle "C" capability when it lofted the Polus spacecraft to orbit on its first launch on May 15, 1987. The only real difference between Energia and Ares V is that Ares is an in line payload LV and energia is side mounted payload.</p><p>I recall the Uragan but even the Energia itself was supposed to be partially reusable. Those large semi boxy looking protrusions on the liquid booster sides were suppose to house booster recovery systems. It was never used as Energia only flew twice and proposals for recovering boosters have so far been more wishful thinking since no booster I'm aware of has ever been recovered except shuttle boosters.</p><p>At one time, NASA expressed an interest in the Energia as a station launcher and it would have been nice to have the Energia for that purpose. It is definitely a shame the Russians could not continue production on Energia. </p> <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>