Revolutionary Concepts in Aeronautics - RevCon, was conceived to provide a means to accelerate the exploration of high-risk, breakthrough technologies to enable revolutionary departures from traditional approaches to air vehicle design. The means to accomplish this was by supporting sub-projects selected from proposals submitted by NASA Research Announcement (NRA), which invited the aerospace community to submit proposals with aeronautical concepts that were revolutionary in nature and not just evolutionary. Partnerships between government, industry and universities were encouraged with cost sharing an important element in the criteria for selection. RevCon was a project-level activity funded through the Flight Research R&T Base program. The lead center was Dryden Flight Research Center with significant participation by Ames Research Center, Moffett Field, Calif., Glenn Research Center, Cleveland, Ohio, and Langley Research Center, Hampton, Va. Funding for the Revolutionary Concepts project ended on Sept. 30, 2001.