jeff2space
Well-Known Member
Last Saturday I flew my Wildman Darkstar 4" DD using a PerfectFlite Stratologger 100 as Primary Altimeter and PerfectFlite Stratologger CF as Backup Altimeter. I'm trying to determine why the Main chute came out at Apogee. I'm thinking two 2-56 shear pins was not enough to hold pressure difference at over 6100 feet, but not sure. I did have pressure relieve hole in Payload section. Also thinking maybe need more that 1 sec apogee delay on Backup. Anyways, I've attached the Altitude/Velocity vs. Time graphs from each altimeter below. Graphs are pretty close except the larger velocity spike at 20 seconds on the SLCF. Anyone have any ideas why this difference between the two altimeters?
View attachment Flight2A-Darkstar4DD.pdf
View attachment Flight2B-Darkstar4DD.pdf
View attachment Flight2A-Darkstar4DD.pdf
View attachment Flight2B-Darkstar4DD.pdf