Engine Mount Seat Frame Front Fork Carriage Mast Front Tube Carriage Keel Carriage Wing Attachment “Hang Point” Wing Keel RIGHT HAND MAIN  LANDING GEAR* GLYPH<127> Shock Strut GLYPH<127> Main Strut GLYPH<127> Drag Strut Main Landing Gear Tires Front Landing Gear Nose Wheel Steering * Conventional configuration shown with other configurations described in main landing gear section of this chapter. Figure 3-26. Basic components of the carriage structure. Figure 3-25. Simple basic trike (left) and sophisticated trike with adjustments for pilot and passenger (right).  the more complex the trike, the more it costs, weighs, and the  more power it requires for similar wings.  [Figure 3-25] Similar to the wing, the carriage is designed with a number  of structural triangles for optimum strength and minimum  weight. Each manufacturer and model have specific  details that vary, but  the carriage structure is  typically a mast, keel,  and front tube that  form the main triangle  components of the  carriage structure with  the wing attachment  at the top of the mast.  A seat frame attached  to the mast and keel  provides rigidity to the  main components while  providing structure for  the pilot and passenger.  [Figure 3-26] Landing struts attached  to the rear wheels  provide structure for the  main landing gear, and  a front fork provides the  landing gear structure  for the front wheel. An  engine mount attaches  to the mast, providing  structure for the  propulsion system to  attach to the carriage.  [Figure 3-26] The landing gear provides support to the WSC aircraft on  the ground and absorbs the shock to reduce the stresses on  the pilot and the aircraft during landings.   Structure  Landing Gear  3-11