cad - Good tools for drawing schematics - Electrical Engineering ... ... EAGLEWiring Schematic Programs - These instructions are for building the V3 board for standard B&G code (for MegaSquirt-I or for MegaSquirt-II). If you are using other code, please refer to the. Stall Speed at Clmax=x.xx - This appears only on the in-flight analysis, and only if the wing area and airframe weight were specified for the model. It indicates the range of speeds which are at or below the aircraft's stall speed at the maximum lift coefficient (i.e. the speed below which the aircraft cannot fly).. If you are interested in the mathematical underpinnings of the AGC software, then this amazing series of memos from MIT's Instrumentation Lab is the place to look..