U.S. boom-suppression research aloft again

 - September 13, 2006, 9:43 AM

Gulfstream is using this NASA F-15B to test a “telescopic quiet spike” that the company hopes will reduce the supersonic noise signature of any potential supersonic business jet. Manufactured from composite materials, the 14-foot-long spike weighs 470 pounds and extends to 24 feet in length for supersonic flight.