Variometer malfunctions  .............................................8-21 Vertical gusts during high-speed cruise.........................8-5 Water ballast ..............................................................11-17 Malfunctions.............................................................8-22 Wave soaring .............................................................10-16 Wave soaring weather..................................................9-16 Weak link .......................................................................1-6 Weather for slope soaring ............................................9-14 Weather reiated information ........................................9-21 Weight.................................................................... 3-9, 5-5 Weight and balance......................................................5-12 Wheel brakes..................................................................2-8 Wind.............................................................................10-4 Wing planform ...............................................................3-6 Elliptical .....................................................................3-6 Rectangular.................................................................3-7 Tapered  .......................................................................3-7 Washout......................................................................3-7 Yaw ...................................................................... 1-6, 3-10 Yaw string.......................................................... 4-16, 7-30  I-6 Y W