Helicopter flight controls blades collectively ("i.e.," all at the same time) and independent of their position. Therefore, if a collective input is made, all the blades change equally, and as a result, the helicopter increases or decreases its total lift derived from the rotor. In level flight this would cause a climb or descent, while with the helicopter pitched forward an increase in total lift would produce an acceleration together with a given amount of ascent. The collective pitch control in a Boeing CH-47 Chinook is called a "thrust control", but serves the same purpose, except that it controls two rotor systems, applying
Helicopter Heroes Helicopter Heroes Helicopter Heroes is a British daytime television series, following the lifesaving work of the Yorkshire Air Ambulance. The first episode aired on 3 September 2007 and a total of seven series have been made. In 2012–13 the team produced a 10 part series called "Helicopter Heroes Down Under", featuring the work of British medics working in Australia. A second, 15 part series is now in production for broadcast in the UK in January 2015. First screened on BBC One in 2007, its first presenter was "Top Gear"'s Richard Hammond. He agreed to front the show to thank the