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erik ostlind

on 25 March 2011

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Then super sonic airplanes are the planes for you New advancments in technology are allowing airplanes to fly faster and farther Now lets take a walk through super sonic transportation's past and future super sonic flight all started back on October 14 - 1947 when Charles "Chuck" Yeager broke the sound barreier in the faimed Bell X1. Past shown here in flight Super Sonic Flight Wouldn't you like to vist a place in Europe or China in less than 4 hours? Besides the Bell X1 NASA had other aircraft of the X series such as the X-15 which flew at mach 6.72. Later on when the US entered the Korean war they built and designed the F- 86 Saber. The USA was not the only one building supersonic jets. The Russian Mig15 was also in use during this era. The next big hit was the Phantom which was used in Vietnam. Followed by the SR - 71 BlackBird. This was the first aircraft to reach mach 3. Now to the good stuff: the first super sonic commercial transport. The Concord The concord began its flights on the 21st of January, 1976. It could make trpis from Paris to New York in under four hours, reaching speeds of up to mach 2 and ended its career in April of 2003. If your wondering why, it's because of multiple reasons. Problems First, the Concord used a very large amount of fuel to cover the same distance as a normal aircraft. So the higher cost of fuel was a big turn off for other potential buyers. Another problem was the obnoxious sonic boom that could break windows and do other variuos damages to houses. So the FAA only permited supersonic flight over water or in authorised airzones. Another problem was the crash of a Concord in Europe. This wasn't really a problem with the technology, but created fear for people flying on the Concord. A smaller problem was that, in order for the Concord or any other supersonic aircraft to travel above the speed of sound, you need to build your aircraft out of more heat resistant materials that also have to be light weight. A sonic boom happens when a plane traveling at high speeeds breaks the sound barrier. The airplane creates large amounts of preasure around the nose and tail areas of the aircraft. When the plane reaches mach 1 or 761 mph, at sea level, the plane releases all the pressure in the form of a pressure wave or a boom; however, the plane does not create just one boom. It's constantly creating them kind a like a boat creates a wake as it travels across water. If you where standing here, you would only feel the wake first, verses someone down the shore, who would feel it later. One of the other problems, not that it bothered the Concord, but in that picture of the SR-71 the piolts were wearing spacesuits. So if were going to go any faster we need a way to lose the suits or just not go that fast. Lastly, not every one could fly on the Concord because it cost a lot of money to get tickets for the trip. Enough with problems lets hear some solutions. Solutions NASA and a few other companies are designing new ways to prevent or lower the apearence of sonic booms so that they are less or not noticeable. They are doing this by putting long retractable arms on the front of the craft, kind of like "supersonic jousting", that are supposed to make the aircraft less likly to create a large sonic boom. Another company, Lockheed, is designing top secret ways to reduce the sonic booms by more than 300%! Lets hope they're right. Even if we quiet the boom and build a more fuel efficient plane we still need less emissions and greener fuel. Fortunately scientists are all ready working on that. UOP, a major technology and fuel company, and the military are creating “green” jet fuel that does not require any new modifications to the engines and fuel lines, and costs the same as petroleum, puts out less emissions, and in some cases makes the plane be able to fly farther on the same amount of fuel. This fuel uses 50% algae and other plant oils and 50% petroleum. Look at the animation right below, this demonstrates pressure wave created by an air craft. The End The lines on the right are all together. Now look at the animation on the right.
Guess which one is super sonic and which one is subsonic. It's lines are never together. If you said the first animation was super sonic and the other was subsonic. YOUR RIGHT! Future There are very high hopes for supersonic flight in the future like the possiablity of reaching mach 3 Or being able to over come the sonic boom. A lot of theis like suppresing the boom are all acheivable in the next ten years but some of the others like reaching mach 3 might be just out of reach due to the size of the aircraft but maybe if we try hard enough we can achieve all of this in our own life time. and even having fully "green" fuel
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