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<font color="yellow">The HL20 is interesting, too, because it is a highly optimized lifting body that is the culmination of American research into spaceplanes.</font><br /><br />Actually we obtained spy photos of the Russian BOR-4 being recovered and reverse engineered it with our own improvements <img src="/images/icons/wink.gif" /> <br /><br />BOR-4 pic....<br /><br />BOR-4 was based on the 2x larger MiG-105-11 spaceplane;<br /><br />MIG-105-11 pic....<br /><br />NASA page with big HL-20 pic.... <div class="Discussion_UserSignature"> </div>