- About Project - History - NA 542 - NA 40 Bongo - Technology Demonstrator - Patents - Gallery - Video   Composites, twin turbine & NOTAR Video   Technology Demonstrator test flight, August 1999 size: 5.7 MB (Standard AVI) 4.3 MB (DivX format) length: 1:02 download (Standard AVI) download (DivX format)