![]() The Mitsubishi Zero was infamous for this problem, and several attempts to fix it only made the problem worse. These included the rapidly increasing forces on the various control surfaces, which led to the aircraft becoming difficult to control to the point where many suffered from powered flight into terrain when the pilot was unable to overcome the force on the control stick. This led to numerous crashes for a variety of reasons. Propeller aircraft were, nevertheless, able to approach the speed of sound in a dive. This problem was one of the issues that led to early research into jet engines, notably by Frank Whittle in England and Hans von Ohain in Germany, who were led to their research specifically in order to avoid these problems in high-speed flight. The power needed to improve performance is so great that the weight of the required engine grows faster than the power output of the propeller. It is due to these effects that propellers are known to suffer from dramatically decreased performance as they approach the speed of sound. This was undesirable, as the transonic air movement creates disruptive shock waves and turbulence. This was particularly noticeable on the Stearman, and noticeable on the T-6 Texan when it entered a sharp-breaking turn. The tip of the propeller on many early aircraft could reach supersonic speeds, producing a noticeable buzz that differentiated such aircraft. Many forms of ammunition also achieve supersonic speeds. Similarly, a flag in strong wind may create a crackling sound produced when its edge goes supersonic. The tip of the whip breaks the sound barrier and causes a sharp crack-literally a sonic boom. The Associated Press contributed to this report.Some common objects such as the bullwhip, or sparewhip, are able to move faster than sound. Thankfully, other than some rattling windows, no damages were reported as a result of the blast. News station KODE 12 said that the breaking of the sound barrier could also be heard throughout Branson, Missouri, although it was less prominent than in Kansas. Illinois was not the only state that had heard the blast. "I live on the west side of town and I got calls from my neighborhood and our administrative assistant lives on the east side of town and she got calls from her neighborhood," he explained to The Herald & Review, "so it was heard from east to west." It allegedly could be heard from the other side of town. Kline also elaborated on just how wide-spanning the noise was. "I went up on the roof of Station One after we heard it and looked around but didn't see any smoke or anything," he explained. Kline wasn't entirely sure where it had come from, as it sounded like something dropped onto the roof of his fire station. Decatur Fire Department Deputy Chief Dan Kline told local newspaper The Herald & Review that calls from concerned residents began flooding their 911 lines. At the time, residents began frantically calling authorities to try and figure out what they heard. "I felt it was either a huge accident out front or something had blown up very near my house." "It shook the windows, it shook the house, I felt the floor vibrate," said resident Cindy Ford. "This kicked off an immediate collaboration between federal, state and local officials to identify the impact and source of the incident," according to IEMA. The pressure wave that resulted from the break created a loud booming noise and shaking that seemingly came from nowhere. The Illinois Emergency Management Agency confirmed that an F-15 EX Strike Eagle fighter jet broke the sound barrier while in flight Tuesday morning. A sonic boom that left many central Illinois residents fearful was caused by an F-15 fighter jet.
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