In June 2013, the Design Build Launch (DBL)
rocket team launched its high-power rocket
at the 8th Annual Intercollegiate Rocket Engineering Competition (IREC)
hosted by Experimental
Sounding Rocket Association (ESRA). The high power commercial motor
carried the rocket to an unknown altitude before going ballistic
(target height was 10,000 ft). The rocket was not recovered.
The post-mission assesment concluded that the cause of failure was the
use of an untested pair of pyrotechnic charges
that were used as a last-minute replacement when the tested pair went
missing right before launch.
Recovery
As the leader for the Recovery Team of the rocket, I was in charge of
coordinating all the rocket components
dealing with the recovery of the rocket after launch. My team
researched parachutes, pyrotechnics, barometers, and other electronics
to perform a safe recovery. I also interfaced with the other team leads
to ensure all aspects of the rocket were on track and all components
would work together.
Avionics
The avionics bay consisted of a pair of independent commercial
barometric altimeters connected to dual pyrotechnic blackpowder
charges. Early versions also contained an arduino to record barometric
pressure logs of the flight. A report of the systems and flight
procedures can be found here (PDF).
Testing
Some early test launches were performed to verify flight hardware. They
showed some work was need to redesign critical load bearing structures.
Lessons Learned
I learned some very valuable lessons in how to
be a leader--that it's more than just being responsible for something,
you have to learn how to best utilize your teammates to get a task done
efficiently. That means getting to know each member and finding out
what
their individual strengths and interests and experience is in.
Other lessons included how to be resourceful when everything goes
wrong, and how to keep a level head and fix problems even when you
think there's nothing you can do but pack up and go home.