F-35A 전투작전반경 (Combat Radius) 관련 최근 기사

 

작년 5월에 공개된 2010년 12월 31일字 작성 F-35 JSF Selected Acquisition Report (SAR) 를 통해 F-35A CTOL 기의

전투작전반경 (Combat Radius) 이 최초 설계 당시 계획한 690 nm 은 물론, JPO (JSF Program Office) 가 수정, 제시

한 KPP (Key Performance Parameter) 590 nm 에도 미달하는 584 nm 이라는 소식을 전한 바 있습니다.

 

아래 기사는 SAR 공개 이후, JROC (Joint Requirments Oversight Council) 을 통해 당초 계획한 690 nm 에는 미치지

못하지만 KPP 는 충족시키는 613 nm 까지 F-35A 의 전투작전반경을 늘리기로 결정했다는 내용 입니다.

 

아래 기사 내용을 참조하자면, F-35A 가 가지는 근본적인 문제점에 대한 해결책이 아닌, 작전고도 및 속도 조절을 통한

작전 환경 변화에 의한 해결책으로 이해가 됩니다.

 

작년 5월에 소개한 SAR 전문은 아래 태그에서 Selected Acquisition Report 로 들어가면 됩니다.

 

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Pentagon Slackens Difficult-To-Achieve JSF Performance Requirements

Posted on InsideDefense.com: March 1, 2012

 

The Pentagon last month relaxed the performance requirements for the Joint Strike Fighter, allowing the Air Force F-35A variant to exceed its previous combat radius -- a benchmark it previously missed -- and granting the Marine Corps F-35B nearly 10 percent additional runway length for short take-offs, according to Defense Department sources.

 

On Feb. 14, the Joint Requirements Oversight Council -- in a previously unreported development -- agreed to loosen select key performance parameters (KPPs) for the JSF during a review of the program convened in advance of a high-level Feb. 21 Defense Acquisition Board meeting last month, at which the Pentagon aimed to reset many dimensions of the program, including cost and schedule.

 

Pentagon sources said a memorandum codifying the JROC decisions has not yet been signed by Adm. James Winnefeld, the vice chairman of the Joint Chiefs of Staff and the JROC chair.

 

Sources familiar with the changes, however, said the JROC -- which also includes the service vice chiefs of staff -- agreed to adjust the "ground rules and assumptions" underlying the F-35A's 590-nautical-mile, combat-radius KPP.

 

Last April, the Pentagon reported to Congress in a selected acquisition report that "based on updated estimate of engine bleed," the F-35A would have a combat radius of 584 nautical miles, below its threshold -- set in 2002 -- of 590 nautical miles.

 

To extend the F-35A's combat radius, the JROC agreed to a less-demanding flight profile that assumes near-ideal cruise altitude and airspeed, factors that permit more efficient fuel consumption. This would allow the estimate to be extended to 613 nautical miles, according to sources familiar with the revised requirement.

 

The estimated combat radius of the short-take-off variant, which is being developed for the Marine Corps, is 15 percent lower than the original JSF program goal even though the aircraft is slated to carry fewer weapons than originally intended, according to the April report.

 

The short-take-off-and-landing KPP before the JROC review last month was 550 feet. In April 2011, the Pentagon estimated that the STOVL variant could execute a short take-off in 544 feet while carrying two Joint Direct Attack Munitions and two AIM-120 missiles internally, as well as enough fuel to fly 450 nautical miles. By last month, that take-off distance estimate grew to 568 feet, according to DOD sources.

 

The JROC, accordingly, agreed to extend the required take-off distance to 600 feet, according to DOD officials.

 

The JROC review of the F-35 program last month was held in accordance with a policy adopted by the council in June 2010, which requires a reassessment of requirements for all programs with cost growth exceeding 25 percent of the original program baseline. one goal of the policy is to determine whether a decision to relax requirements should be made to improve acquisition cost and schedule estimates. -- Jason Sherman

 

 

 

  USAF F-35A CTOL ⓒ Lockheed Martin

 

  USAF F-35A CTOL ⓒ Lockheed Martin

 

  USAF F-35A CTOL ⓒ Lockheed Martin

 

  US Marines F-35B STOVL ⓒ Lockheed Martin

 

  US Marines F-35B STOVL ⓒ Lockheed Martin