Acquisition cost. Refers to the price (including the closing costs) to purchase another company or property. In the context of investments, refers to price plus brokerage commissions, of a security, or the sales charge applied to load funds.
The pressure imbalance that produces lift creates a problem at the wing tips. The higher-pressure air below a wing spills up over the wing tip into the area of lower-pressure air above. The wingâs forward motion spins this upward spill of air into a long spiral, like a small tornado, that trails off the wing tip. These wing tip vortices create a form of pressure drag called vortex drag. Vortices reduce the air pressure along the entire rear edge of the wing, which increases the pressure drag on the airplane. The energy required to produce a vortex comes at the expense of the forward motion of the airplane. Tilting the airplaneâs wings upward makes the vortices stronger and increases vortex drag. Vortices are especially strong during takeoff and landing, when an airplane is flying slowly with its wings tilted upward.
Transcript of Describe the Types of Drag That Act Upon an Aircraft Why? - to take a closer look at one of the four forces that act upon an aircraft/principles of flight MTP 1: What is drag? - The Force that opposes foreword motion of an aircraft. MTP 2: What is Parasite Drag? - The drag created by parts of the aircraft that do not create lift Form Drag The drag created by the body of the aircraft as it resists air MTP 3: Wing Tip Vortexes Phenomenon called Wing Tip Vortexes are evidence that induced drag indeed does exist. GOOD