REG NASA-LLIS-0512-1994 Lessons Learned - Increased Understanding of the Effects of Lightning Strikes on Aircraft.pdf

1、Lessons Learned Entry: 0512Lesson Info:a71 Lesson Number: 0512a71 Lesson Date: 1994-07-29a71 Submitting Organization: LARCa71 Submitted by: Bernard LewisSubject: Increased Understanding of the Effects of Lightning Strikes on Aircraft Description of Driving Event: Since 1960, the NASA Langley Team ha

2、s flown a NASA-owned F-106B airplane through thunderstorms about 1500 times at altitudes between 5000 and 40000 feet (1500 to 12000 meters). The airplane, lightning-hardened and outfitted with special instruments, was hit by lightning 714 times. Ground-based NASA RADARs located across the Chesapeake

3、 Bay on Wallops Island, Va., Were used to guide the airplane into the upper, and most electrically active, regions of thunderstorms. Considerable attention was paid to protecting the crew during these potentially dangerous missions.When lightning strikes an airplane, it may take more than a second b

4、efore the extremely fast and interactive electromagnetic effects die away. Currents between 10000 and 200000 amperes may flow through the airplanes metal skin, setting up electromagnetic fields that may propagate into the airplanes interior through open apertures, diffusion, or other mechanisms.Amon

5、g other significant findings, this research produced data that was the first to actually capture an airplane in the act of triggering a lightning flash.Lesson(s) Learned: NASA LaRC research has significantly increased understanding of the effects of lightning strikes on aircraft.Recommendation(s): I

6、nformation concerning this project is contained in the article, “Aircraft Jolts from Lightning Bolts“, authored by Felix L. Pitts and Bruce D. Fisher of NASA Langley Research Center, et al., In the July, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-

7、,-1988 Institute of Electrical and Electronics Engineers (IEEE) Spectrum.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Aircrafta71 Environmenta71 Research & DevelopmentAdditional Info: Approval Info: a71 Approval Date: 1997-04-02a71 Approval Name: Elijah C. Kenta71 Approval Organization: 421a71 Approval Phone Number: 757-864-3345Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-