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Such type of a helicopter can fly forward only, which restricts their movement, but nonetheless is much less complicated to use. There is also the three-channel helicopter, which has reverse movements too. These can do many movements. The user can tilt the blades, and the helicopter thus will do moves such as climbing, swooping, looping, rolling, flying, etc. Power source RC helicopters controlled by the radio need power source in order to work. Most common are electric batteries and glow fuel, but some use turbine engines and gasoline. The most common are glow fuel helicopters. There is no height limit for such helicopter.

Batteries are safe and convenient to use. Batteries at first could not equal the power given by glow fuel. However, the advancement of science made it possible for lithium polymer batteries give more than 12 minutes of fight time. Batteries cost you less and plus, contrary to the fuel powered motors, batteries create much lesser noise.

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This is a great choice for people, who use their helicopters in their residential colonies or take videos along with the sound. Add-ons and accessories Few RC helicopters come with some accessories already built in or additionally added on later. Most of the people fly this helicopter only for the purpose of pleasing and improve their skills of controlling. But also there are others, who learn how to operate it for other purposes.

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Few photographers may want to invest in these so that they can click aerial photos without having to invest in renting an actual helicopter. For this use, the RC camera is perfect. You can also find wireless cameras for the same purpose, but these are more suited for their use in surveillance as these will not take very good quality pictures. So buy accordingly!

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"HISTORY OF MOBILE APPLICATION DEVELOPMENT" History of Mobile Application Development Don’t we all just love mobile apps? Well, these applications that have come to be a part of our everyday lives have an interesting history and not many may know about it. For many of you, the development of mobile applications dates back a few years ago to with the iPhone application development. However, app development may go back a few years before that when Blackberry first gave wireless email in 2002 by RIM. Since then the world of app development has advanced in leaps and bounds as you will see below. The App Development Journey We cannot ignore the big shove given by Apple with their iTunes marketplace. We can say that this was really the first time mobile phone users were able to fully take advantage of mobile applications.

A year after Apple released their first iPhone which had preloaded apps, they launched their App Store in 2008 and this took Smartphone users by storm. The same year in October, Google launched their Android Market with HTC Dream which was the first Android Smartphone available commercially. As of April 2009, the number of Apps that had been downloaded in Apple’s App Store had surpassed 1 billion which was incredible considering the App Store had only been in existence for eight months.

In September 2011, this number had grown tenfold with over 10 billion downloads. Android also have proved to be a major competitor with app development and in April 2010, the total number of apps downloaded from the Android Market exceeded 1 billion. Barely a year later in January 2011, the total app downloads surpassed the 10 billion mark as well.

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