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Burbank Stage 3 hushkit for Boeing 707 nears approval
Burbank Aeronautical (BAC) has started the final flight tests of its BAC II Stage 3 hushkit, fitted to the Pratt & Whitney JT3D-3B engines of a Boeing 707-300. Certification is expected in May. The hushkit has been shown to attenuate by 30dB the noise of a Stage 1 aircraft, and ...
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