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
Chinook Point Chinook Point Chinook Point is a headland in Pacific County, Washington. Located just northwest of the mouth of the Columbia River, it is historically significant for several reasons. Captain Robert Gray, the first non-native to enter the river, saw it from Chinook Point in 1792. In 1805, it was the site of an encampment by the Lewis and Clark Expedition. It has been the site of military fortifications since 1864, most notably in the late 1890s, when most of the presently surviving Fort Columbia structures were built. The point, which constitutes the most developed portion of Fort Columbia State Park,