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Engineers of the Northrop-Grumman Corporation had long been interested in the Ho 229, and several of them visited the Smithsonian Museum’s facility in Silver Hill, Maryland in the early 1980s to study the V3 airframe. A team of engineers from Northrop-Grumman ran electromagnetic tests on the V3’s multilayer wooden center-section nose cones.

Engineers of the Northrop-Grumman Corporation had long been interested in the Ho 229, and several of them visited the Smithsonian Museum’s facility in Silver Hill, Maryland in the early 1980s to study the V3 airframe. A team of engineers from Northrop-Grumman ran electromagnetic tests on the V3’s multilayer wooden center-section nose cones.

The only surviving Horten Ho 229 - "Hitler's Stealth fighter" - http://www.warhistoryonline.com/military-vehicle-news/the-only-surviving-horten-ho-229-hitlers-stealth-fighter.html

The only surviving Horten Ho 229 - "Hitler's Stealth fighter" - http://www.warhistoryonline.com/military-vehicle-news/the-only-surviving-horten-ho-229-hitlers-stealth-fighter.html