This screen is used to edit a drag breakdown item. The following details are recorded;


Item

The item is predefined and is display only. This defines the type of drag item and is used by the Lookup button to determine what darg coefficient data to obtain.

Description

This is a description of the item. Typically this describes what area is used in the Area field. This may be altered.

Drag Coefficient

This is the drag coefficient used for performance calculations. This may be entered manually or may be automatically obtained by clicking  on the Lockup button.

Area

This is the area used in the drag calculations. This varies according to the way the drag coefficients were derived.

Aspect Ratio

This field will be shown if the item is a main wing for the selected design. A value must be entered if this field is visible. It is used in the performance calculations.

To automatically load aerodynamic data and the area from a wing or tail section which has already been designed, click on the Lookup button. If the drag coefficient cannot be obtained for the airfoil selected for the wing or tail section then an airfoil search screen will be displayed. This screen will allow for the selection of an airfoil and Drag Coefficient. Once selected this data will be copied into this screen. 

If the item is a fuselage then the Drag Coefficient Lookup for Fuselage ScreenDrag_Coefficient_Lookup_for_Fuselage_Screen  screen will be displayed. 


To accept the entered or changed values click on the Ok button. 

To exit without saving click on the Cancel button.

To access Help on this screen press the Help button or press the function key F1.