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Pyotr (Petr) Yakovlevich Ufimtsev (Russian: Пётр Я́ковлевич Уфи́мцев; born 8 July 1931) is a Soviet and Russian electrical engineer and mathematical physicist, best known for his pioneering work on the physical theory of diffraction (PTD), which laid the groundwork for modern stealth aircraft technology.
Stealth technology, also termed low observable technology (LO technology), is a sub-discipline of military tactics and passive and active electronic countermeasures. [1] The term covers a range of methods used to make personnel, aircraft , ships , submarines , missiles , satellites , and ground vehicles less visible (ideally invisible ) to ...
The Boeing Bird of Prey is an American black project aircraft, intended to demonstrate stealth technology.It was developed by McDonnell Douglas and Boeing in the 1990s. [1] The company provided $67 million of funding for the project; [1] it was a low-cost program compared to many other programs of similar scale.
The F-117 Nighthawk was the first operational aircraft explicitly designed around stealth technology. Other examples of stealth aircraft include the B-2 Spirit , the B-21 Raider , the F-22 Raptor , [ 3 ] the F-35 Lightning II , [ 4 ] [ 5 ] the Chengdu J-20 , [ 6 ] and the Sukhoi Su-57 .
The Northrop B-2 Spirit, also known as the Stealth Bomber, [3] is an American heavy strategic bomber, featuring low-observable stealth technology designed to penetrate dense anti-aircraft defenses. A subsonic flying wing with a crew of two, the plane was designed by Northrop (later Northrop Grumman ) as the prime contractor, with Boeing ...
A number of individual inventors also made important contributions to aircraft technology, such as Gleb Kotelnikov who invented the knapsack parachute, or Evgeniy Chertovsky who introduced the pressure suit. Theoretical works by Petr Ufimtsev played a critical role in development of stealth technology.
The aircraft incorporated features that were later referred to as low observables or stealth technology. When SR-71 crews became upset that engineers were not putting enough effort into solving a constant problem with violent engine unstarts in flight, Rich considered taking a flight in the SR-71 to experience the phenomenon himself, which ...
F-117 Nighthawk F-117 flying over mountains in Nevada in 2002 General information Type Stealth attack aircraft National origin United States Manufacturer Lockheed Corporation Status Retired from combat, used as training aircraft as of 2025 Primary user United States Air Force Number built 64 (5 YF-117As, 59 F-117As) History Introduction date October 1983 ; 41 years ago (1983-10) First flight ...