I've got a Grob 102 Standard Astir III. The manual that came with the
plane has one flight polar diagramed. The diagram contains flight
polars for 3 different configurations of the G102. Because so many
lines are drawn in close proximity to each other, its not a diagram
that can be used for calculating speed to fly. Does anyone know have a
clean flight polar for the 102 Standard Astir III being flown without
ballast, or know where I could get one? Thanks, John Murphy.