Design ListDesign_List 

Other Available Tabs

Detail TabDetail_Tab 

Drag Breakdown TabDrag_Breakdown_Tab 

Power Required TabPower_Required_Tab 

Lift to Drag Ratio TabLift_to_Drag_Ratio_Tab 

Design CAD TabDesign_CAD_Tab 


This tab shows a list of the following;


Speed

Speed of the aircraft

CL

Calculated Lift Coefficient based on the aircraft weight and wing area

CD

Calculated Drag Coefficient based on the total flat plate area of the aircraft

L/D

Lift to Drag Ratio. The ratio of the Lift Coefficient and Drag Coefficient.

Power Required

Calculated power required in the units of the Maximum Power multiplied by the maximum propeller efficiency. The maximum propeller efficiency is set in the Winfoil Preferences screen. A good starting point is 80%. Propeller efficiency does vary with speed. The simplified calculation provided here is a guide to maximum performance. The calculation of propeller efficiency and selection of propellers will be provided in a later version of Winfoil.


At the bottom of the screen is a dropdown list box containing speed units. The selected units do not have to match the units used in other tab screens. Winfoil will automatically convert from unit to unit. 

Each time this tab is accessed, Winfoil will automatically recalculate the performance of the design. 


The following performance items are calculated based on the data entered;


Stall Speed

Estimated Maximum Speed

Maximum Lift to Drag Ratio

Minimum Sink Speed at speed


These values will be shown automatically by moving the mouse over the tab in a Tool Tip style window(Performance Popup BoxPerformance_Popup_Box ).


Printing Performance Details


These details may be printed by clicking on the Print menu item in the File menu or by clicking on the Print toolbar button.