I have had an awful track record when it comes to 38mm min diameter rockets.
Back in 2014, I made my first one that flew on a CTI I800 Vmax. Shredded the phenolic airframe very quickly.
2015 I tried again with a carbon airframe, better stability margin and carbon fins with a CTI I216 classic. That motor cato’d.
February 2021, I revive the previous rocket (since it survived the cato with some burn marks on the side), and try it again on another I216. The apogee charge fails and it punches a hole through the ice of the frozen lake we were flying off of.
March 2021, new one with a fiberglass airframe and carbon fins. AT I1299 Warp-9 as the motor. That cato’d at about 245 Gs of acceleration.
So here I am again. Attempting another I1299 powered min diameter rocket. Am I crazy? Maybe. But somethings I just can’t leave unfinished (so yes there will be another I216 min diameter rocket at some point).
Looking to pull about 250 Gs with this one and reach an altitude of about 10,500’. Should break mach 1 before 100’ and mach 2 before 500’. Will be flying at XPRS this weekend.
Back in 2014, I made my first one that flew on a CTI I800 Vmax. Shredded the phenolic airframe very quickly.
2015 I tried again with a carbon airframe, better stability margin and carbon fins with a CTI I216 classic. That motor cato’d.
February 2021, I revive the previous rocket (since it survived the cato with some burn marks on the side), and try it again on another I216. The apogee charge fails and it punches a hole through the ice of the frozen lake we were flying off of.
March 2021, new one with a fiberglass airframe and carbon fins. AT I1299 Warp-9 as the motor. That cato’d at about 245 Gs of acceleration.
So here I am again. Attempting another I1299 powered min diameter rocket. Am I crazy? Maybe. But somethings I just can’t leave unfinished (so yes there will be another I216 min diameter rocket at some point).
Looking to pull about 250 Gs with this one and reach an altitude of about 10,500’. Should break mach 1 before 100’ and mach 2 before 500’. Will be flying at XPRS this weekend.