Group photo following the 300th NASA Dryden flight of F-15B #836.
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Project: Quiet Spike
Group photo following the 300th NASA Dryden flight of F-15B #836. This milestone occurred during the Quiet Spike project, in which a retractable, 24-foot-long lance-like spike was mounted on the nose of the aircraft. The spike, made primarily of composite materials, created three small shock waves that traveled parallel to each other all the way to the ground, producing less noise than typical shock waves that build up at the front of supersonic jets.October 20, 2006NASA Photo / Tom Tschida› Quiet Spike Project Description