-------------------------------------------------------------------------------------------- fire date : Jan 31, 2004 motor id : 013104B grain id : no id (poured 1/15/04 - 99% paraffin, 1% graphite) paraffin weight (pre-fire) : 245.7 grams paraffin weight (post-fire) : 87.6 grams nozzle throat(pre-fire) : 0.742 cm (assumed -not measured prior to firing) nozzle throat(post-fire) : 0.742 cm (assumed -not measured prior to firing) nozzle exit : 1.71 cm nozzle enterance : 4.45 cm converging half angle : 60 deg diverging half angle : 17 deg ignition ring : T-1 sec oxygen initiation : T=0 sec oxygen termination : T+7 sec nitrogen purge initiation : T+9 sec nitrogen purge termination : T+14 sec NOTES: video analysis shows a 7.07 second burn time. There was an initial burst of flame that lasted approximately .03 seconds. This was followed by 2.25 seconds of instability, which started as a high velocity jet of white smokey exhaust and then started fluctuating with intermittent bursts of flame in the exhaust. This intermittent behavior transitioned into 4.79 seconds of stable burn. time load pressure1 pressure2 regresinj regresmid regresnzl -------------------------------------------------------------------------------------------- no data collected