What event marked the beginning of the US Civil War? The main cause of the Civil War has been debated for years. The first military action was Confederate forces attacking Union Fort Sumter.
1 Lift Charts. 2  The lift curve is a popular technique in direct marketing. 3  The input required to construct a lift curve is a validation dataset that has been scored by appending to each case the estimated probability that it will belong to a given class.
Lift (or forward motion) is created by making the air pressure lower on the front of the propeller blade than the back so the aircraft is actually being pulled / pushed forward by air pressure rather than being pushed by thrust - thrust is created by the forceful ejection of fuel such as from a jet or rocket engine