Permalink: http://www.boeingimages.com/archive/Boeing-and-Industry-Partners-Prove-Quiet-Technologies-for-Commercial-Jets-2F3XC56PAWH.htmlCopyright © Boeing. All Rights Reserved.View Photo/Video onlyConceptually similar777-300ER Wing and Nacelle Above CloudsBBJ 777-200LR and BBJ 777-300ER on TarmacBoeing BBJ 777-300ER Over OceanBoeing BBJ 777-300ER Over Coastline777-300ER Illustration in Boeing LiveryBoeing BBJ 777-200LR and BBJ 777-300ER in FormationQuiet Technology Demonstrator 2 Test ResultsQuiet Technology Demonstrator 2 NacelleBoeing 777-300ER Engine Nacelle Above CloudsView AllView more with similar tones Boeing and Industry Partners Prove Quiet Technologies for Commercial JetsSelect usageWhat Type of Order?Usage:The Quiet Technology Demonstrator 2 (QTD2)research and development program was completed in November 2005. A 777-300ER with GE90-115B engines, already the quietest airplane in its class, was fitted with eight different noise-reduction engine inlet and exhaust combinations on the right wing, and the baseline production engine on the left wing. Fan and engine-core chevron exhaust configurations achieved as much as a two-decibel improvement -- a significant community noise reduction. Because jet noise is generated by the jet wake -- extending nearly 50 feet behind the engine -- any reduction is considered a significant achievement. In addition, the low-frequency rumble heard in the aft cabin by passengers during cruise was reduced by up to four to six decibels.BI228597 (k63429-135)Maximum size:2400px × 3000px (~20 MB)8.0in × 10.0in (300dpi)License type:Rights ManagedKeywords:2000s-777-300ER-air to air-BBJ 777-blue-blue skies-bright-close-ups-clouds-commercial airline livery-commercial passenger planes-copy space-currently in development-currently in production-day-engines-exteriors-flying-gray color-high-tech / advanced-landing gear doors-main wheels-nacelles-nobody-photos-propulsion systems-Quiet Technology Demonstrator Two (QTD2)-right side views-science and technology-slats-sunshine-technology demonstrators-testing-trailing edge flaps-viewed from belowRelated Photo/Videos:View All
