{"type":"programs","slug":"1951-project-rainbow","title":"Project RAINBOW","url":"https://disclosdex.com/programs/1951-project-rainbow","description":"U.S. Navy and CIA radar cross-section reduction program for U-2 spy plane operations against Soviet defenses","date":"1951-01-01T00:00:00.000Z","tags":["Craft"],"updated":"2025-06-13T13:26:43.000Z","connectionCount":0,"content":{"markdown":"## Origins and Context\n\nProject RAINBOW emerged in 1951 as a classified program to reduce the radar signature of reconnaissance aircraft.[^1] The program gained urgency after Soviet radar systems demonstrated the ability to track high-altitude aircraft.[^2]\n\n## Program Structure\n\nThe U.S. Navy Research Laboratory led technical development, collaborating with CIA and Lockheed engineers.[^3] The program tested various radar-absorbent materials and surface treatments on operational aircraft.[^4]\n\n## Technical Capabilities\n\nRAINBOW developed ferrite-based coatings and wire mesh configurations to minimize radar returns.[^5] The modifications reduced the U-2's radar cross-section but impacted aircraft performance and maintenance.[^6]\n\n## Legacy\n\nThe program established foundational radar cross-section reduction techniques.[^7] These advances influenced later stealth aircraft development, including the A-12 OXCART and F-117.[^8]\n\n[^1]: [CIA Center for the Study of Intelligence, _The CIA and the U-2 Program, 1954-1974_](https://www.cia.gov/resources/csi/books-monographs/the-cia-and-the-u-2-program-1954-1974/).\n\n[^2]: [CIA Center for the Study of Intelligence, _The CIA and the U-2 Program, 1954-1974_](https://www.cia.gov/resources/csi/books-monographs/the-cia-and-the-u-2-program-1954-1974/).\n\n[^3]: [CIA Center for the Study of Intelligence, _The CIA and the U-2 Program, 1954-1974_](https://www.cia.gov/resources/csi/books-monographs/the-cia-and-the-u-2-program-1954-1974/).\n\n[^4]: [CIA Center for the Study of Intelligence, _The CIA and the U-2 Program, 1954-1974_](https://www.cia.gov/resources/csi/books-monographs/the-cia-and-the-u-2-program-1954-1974/).\n\n[^5]: [CIA Center for the Study of Intelligence, _The CIA and the U-2 Program, 1954-1974_](https://www.cia.gov/resources/csi/books-monographs/the-cia-and-the-u-2-program-1954-1974/).\n\n[^6]: [CIA Center for the Study of Intelligence, _The CIA and the U-2 Program, 1954-1974_](https://www.cia.gov/resources/csi/books-monographs/the-cia-and-the-u-2-program-1954-1974/).\n\n[^7]: [CIA Center for the Study of Intelligence, _The CIA and the U-2 Program, 1954-1974_](https://www.cia.gov/resources/csi/books-monographs/the-cia-and-the-u-2-program-1954-1974/).\n\n[^8]: [CIA Center for the Study of Intelligence, _The CIA and the U-2 Program, 1954-1974_](https://www.cia.gov/resources/csi/books-monographs/the-cia-and-the-u-2-program-1954-1974/).","readingTime":"2 min read"},"relatedRecords":[],"citation":{"canonicalUrl":"https://disclosdex.com/programs/1951-project-rainbow","title":"Project RAINBOW","publisher":"Disclosdex","retrievedFrom":"https://disclosdex.com/api/v1/programs/1951-project-rainbow","license":"CC-BY-4.0"}}