Note: Gear drag can only be calculated in the subsonic speed regime.
The fixed landing gear drag coefficient for an aircraft with i landing gears may be computed from:
Values of the drag coefficient of the fixed gear based on its own reference area can be obtained from the following graphics:
See: Graphic: Fixed Undercarriage Drag, Part I
See: Graphic: Fixed Undercarriage Drag, Part II
See: Graphic: Main Gear Drag: Fixed Gears Attached to Nacelles Pt I
See: Graphic: Main Gear Drag: Fixed Gears Attached to Nacelles Pt II
See: Graphic: Gear Fairing Types
See: Graphic: Nose Gear Drag Coefficients
See: Graphic: Tail Gear Drag Coefficients
See: Graphic: Landing Gear Induced Drag Factor
See: Graphic: Strut Length and Frontal Tire Surface Area
The fixed gear reference area is calculated from