# Test 9 # Identical to [Test 6](test6.html), using the formula from [Test 5](test5.html). These grains were cast on 29 August 2015. ## Results ## * Grain 1, 57.04g gross, ?g net * Grain 2, 52.88g gross, ?g net * Grain 3, 54.14g gross, ?g net * Grain 4, 53.97g gross, ?g net ## Observations ## Motor 434g pre-flight, 220g post-flight. Fat-Boy igniter. Rocket post-flight mass was 984g. Nozzle throat was 0.334 post-flight.