viewimageM.php?id=war&no=24b0d769e1d32ca73cef82fa11d028318df6ae160d01f5efcea72e93906ab7d56a587c68410d8ce5b985eaa78f6c1fb6cb6bdceca7aebbd345f60db0db959a0586456a54e936399d67aaea74f5aa713719cb9fd6be

https://www.google.co.kr/url?sa=t&source=web&rct=j&url=https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20030075684.pdf&ved=2ahUKEwjqr82wy9rbAhXLjpQKHY1SAs0QFjABegQIBhAB&usg=AOvVaw1W807vCil-0AsyxTG68IME


자료분석 못하므로 abstract만 간략히 번역함.

The Autonomous Formation Flight (AFF) project at the NASA Dryden Flight Research Center (Edwards,California) investigated performance benefits resulting from formation flight, such as reduced aerodynamic dragand fuel consumption. To obtain data on performance benefits, a trailing F/A-18 airplane flew within thewingtip-shed vortex of a leading F/A-18 airplane. The pilot of the trail airplane used advanced station-keeping technology to aid in positioning the trail airplane at precise locations behind the lead airplane. The specially instrumented trail airplane was able to obtain accurate fuel flow measurements and to calculate engine thrustand vehicle drag. A maneuver technique developed for this test provided a direct comparison of performance values while flying in and out of the vortex. Based on performance within the vortex as a function of changes invertical, lateral, and longitudinal positioning, these tests explored design-drivers for autonomous station-keeping control systems. Observations showed significant performance improvements over a large range of trailpositions tested. Calculations revealed maximum drag reductions of over 20 percent, and demonstratedmaximum reductions in fuel flow of just over 18 percent.


NASA에서 F/A-18을 가지고, 편대비행을 통해 연료소모율을 낮추는 연구를 함. 날개 익단에서 생기는 와류에 편대기를 위치시켜서 공기저항을 줄임. 정밀하게 기체를 위치시키는 기술을 통해 가능하게 했고, 기존 연료계가 비정밀 하기 때문에, 엔진에서 직접적으로 계측함.
수직, 수평, 그리고 전후로 옮겨가며 실험했고, 선행기를 그대로 뒤따르는 trail 에서 가장 높은 효율을 보임.
계산상 20%였고, 실제 실험상 18% 연료사용량 감소를 보임.