Techniques and Tips « Competition Guide NAR Rocketry Competition Altitude Events Craftsmanship Events Duration Events Miscellaneous Events Techniques and Tips Detecting Thermals Downsizing Body Tubes for Scale High Strength Parachutes Launchers Tracking Powder Some techniques and tips are applicable to a variety of competition events. These tips are summarized below: Detecting thermals High strength parachutes Tower and piston launchers Tracking powder Downsizing body tubes Information and Tips for Using Altimeters in NAR Competition Simple Fin Jig for Thin G10 Finned Models