Here is the last shot of my 4" Drago before it's shred at Holtville Havoc March 3rd:
This was the third flight for this rocket, first was on a k456 dark matter. Nominal flight to 5450 ft. with a normal recovery. Second flight was the drag race at ROCstock on the K850 dark matter. Awesome flight to 7614 ft. which won the drag race.
I liked that motor so much, I bought another one and flew it at Holtville, with disastrous results. Lost two fins at 4546 ft. Just about burn out of the motor, and close to 10,000 fps.
I downloaded the altimeters today, and think I have found an answer as to why this event happened.
Both altimeters had that strange sine wave before spiking up, with the Stratologger indicating a normal sequence of events after the incident. The RRC-3 fired the drogue, which sheared the pins on the N/C and deployed the main chute. Both of the fins were recovered, and amazingly, the main chute was undamaged. The drogue was destroyed, and the swivel on the main will never be the same again.
Originally, I thought that my epoxy failed when the rocket got some fin flutter or something, but with the downloaded data from the RRC-3, now I'm thinking that my static ports didn't vent right due to the twist and tape wires blocking them. I'm open to any other ideas on this....
This was the third flight for this rocket, first was on a k456 dark matter. Nominal flight to 5450 ft. with a normal recovery. Second flight was the drag race at ROCstock on the K850 dark matter. Awesome flight to 7614 ft. which won the drag race.
I liked that motor so much, I bought another one and flew it at Holtville, with disastrous results. Lost two fins at 4546 ft. Just about burn out of the motor, and close to 10,000 fps.
I downloaded the altimeters today, and think I have found an answer as to why this event happened.
Both altimeters had that strange sine wave before spiking up, with the Stratologger indicating a normal sequence of events after the incident. The RRC-3 fired the drogue, which sheared the pins on the N/C and deployed the main chute. Both of the fins were recovered, and amazingly, the main chute was undamaged. The drogue was destroyed, and the swivel on the main will never be the same again.
Originally, I thought that my epoxy failed when the rocket got some fin flutter or something, but with the downloaded data from the RRC-3, now I'm thinking that my static ports didn't vent right due to the twist and tape wires blocking them. I'm open to any other ideas on this....