북미 XB-70 발키리 - 사진 및 비디오

North American XB-70 Valkyrie
국가	미국
역할	전략 폭격기 – 초음속 연구 항공기
첫 비행	1964년 9월 21일
내장	2

Tthe 북미 항공 XB-70 발키리 미 공군 전략 항공 사령부를 위해 계획된 B-70 핵무장 심공 전략 폭격기의 프로토타입 버전이었습니다. 1950년대 후반 북미 항공에서 설계한 6개의 엔진을 장착한 Valkyrie는 70,000피트(21,000m)에서 비행하면서 마하 3+로 수천 마일을 순항할 수 있었습니다.

소스: 북미 XB-70 발키리 ― 위키피디아

북미 XB-70 발키리 산책
사진 작가	존 헥, 블라디미르 야쿠보프
로컬라이제이션	USAF 국립 박물관
사진	134

North American XB-70 Valkyrie 01

North American XB-70 Valkyrie 02

North American XB-70 Valkyrie 03

North American XB-70 Valkyrie 04

North American XB-70 Valkyrie 05

North American XB-70 Valkyrie 06

North American XB-70 Valkyrie 07

North American XB-70 Valkyrie 08

North American XB-70 Valkyrie 09

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참고 항목:

General Characteristics and Role

The North American XB-70 Valkyrie was the prototype version of the planned B-70 strategic bomber for the United States Air Force (USAF). Developed during the height of the Cold War, its radical design was intended to create an aircraft capable of penetrating Soviet airspace at sustained speeds of Mach 3 (three times the speed of sound) and altitudes above 70,000 feet (21,000 m). Its role was to serve as a high-speed, high-altitude strategic nuclear bomber, making it theoretically invulnerable to interception by Soviet fighters and early surface-to-air missiles of the time. However, the program faced rapid technological obsolescence and cost overruns, leading to its cancellation and reassignment as a research vehicle.

Property	Typical Value (XB-70A)
역할	Experimental Strategic Bomber Prototype
National Origin	미국
제조업체	North American Aviation (now part of Boeing)
First Flight	1964년 9월 21일
승무원	2 (Pilot and Co-pilot)
길이	57.6 m (189 ft 0 in)
윙스 팬	32.0 m (105 ft 0 in)
Maximum Takeoff Weight	249,500 kg (550,000 lb)

Powerplant and Unique Aerodynamics

Engines: 6 x General Electric YJ93-GE-3 turbojet engines (in a common engine bay).
Maximum Speed: Mach 3.1.
Cruise Speed: Mach 3.0.
Thrust (Each Engine): 31,000 lbf (138 kN) with afterburner.
Compression Lift: The Valkyrie utilized a revolutionary design where the shockwave generated by the fuselage at Mach 3 was channeled under the large, fixed delta wing, providing up to 30% of its lift.
Movable Wing Tips: The outer 20 feet (6.1 m) of the wings could be folded down by up to 65 degrees at high speeds. This increased directional stability and, critically, helped trap the compression lift shockwave underneath the wing.
Construction: Largely built from stainless steel and titanium to withstand the extreme heat generated by sustained supersonic flight (thermal soak).

Program History and Legacy

Cancellation Drivers: The development of effective Soviet high-altitude surface-to-air missiles (like the S-75 Dvina, or SA-2 Guideline) made the high-altitude Mach 3 profile vulnerable. Coupled with the massive development cost, the bomber program was canceled in 1961.
Research Role: After cancellation, the two built prototypes (AV-1 and AV-2) were used as Mach 3 research aircraft for the supersonic transport (SST) program.
Tragedy: The second prototype, XB-70A AV-2, was destroyed in 1966 after a mid-air collision with an F-104 chase plane during a photo shoot.
Legacy: Although it never became an operational bomber, the XB-70 program provided invaluable aerodynamic, materials science, and flight control data crucial for future high-speed military and civilian aircraft development.
Preservation: The sole surviving aircraft, XB-70A AV-1, is preserved and displayed at the National Museum of the United States Air Force at Wright-Patterson AFB in Dayton, Ohio.