3" Fin and AirFrame Template

thingiverse

If you build high-performance rockets, you know what this is ideal for. This is designed specifically for a 3-inch G10 fibreglass airframe, but can also be adapted for use with a G12 (simply by adding some shimming tape). This is a 3-inch fin guide suitable for both 4-fin and 3-fin rockets. It features corresponding alignment guides as well as drillhole guides for vent and switchband placement.