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NASA TO STUDY HOW LOUD SUPERSONIC JET GETS BY FLYING OVER GALVESTON Lockheed Martin is pitching its planned supersonic passenger plane as the quietest yet — despite its top speed of 940 mph. The company says a prototype will be ready within the next few years. But NASA won’t wait that long to find out how loud it’ll be: “the government agency will use an F/A-18 Hornet aircraft to replicate the softer sonic boom and measure how receptive Galvestonians will be,” reports the Chronicle‘s Andrea Rumbaugh. After lifting off from Ellington Airport, the plane will dive down at a 53-degree angle off the Galveston coast, breaking the sound barrier as it does. “Most of that sound will go toward the water,” writes Rumbaugh. But when it pulls up, “some of the sound will travel toward Galveston. By the time it reaches the island, it will be at the sound level expected from NASA’s X-plane.” Five hundred chosen residents and a handful of sound monitors will listen up for 10 non-consecutive days in November and provide feedback on the noise level — which NASA’s project manager says shouldn’t be that bad: “If a traditional sonic boom is hearing a thunderstorm directly overhead,” he explains “then the new reduced sonic boom will be like hearing a storm rumble far in the distance.” [Houston Chronicle ($)] Rendering of Low Boom Flight Demonstration X-plane: NASA