Responsible Engineers: Owen M, Kevin G, Jenna B, Juan A, Nicole C, Max, Sam H, Amanda M
Hermes III Deployment: https://wikis.mit.edu/confluence/display/RocketTeam/HADES
Phoenix Deployment: Hardware
Research into other medthods: Nitrocellulose, Separation Events, https://wikis.mit.edu/confluence/download/attachments/120175068/Jim_Jarvis_Highaltitude_deployment_2013.pdf?version=1&modificationDate=1491853101000&api=v2, https://docs.google.com/document/d/1-FvnbYQmETId8Ko6nY0LdCxwcloM4aGdy2pHURnmPTc/edit
Piston
Used on Phoenix, Staging Demo and HADES
Piston failure experienced on Staging Demo II (resulted in sustainer destruction)
Pressure sealed so can be used at high-altitudes
Although risk of no pressure seal on the firebolts (mitigated using hydrostatic testing)
Overall black powder is less reliable at higher altitudes (lower pressure slows down combustion propagation)
Takes up 8 inches in length of mpt
Can be reused
Look into & test shorter pistons?
CO2 Canisters
Good for use at high-altitudes (20k ft+) b/c completely pressure sealed
Takes up approximately 5 inches in length of mpt
USCRPL Recovery Presentation https://docs.google.com/document/d/1-FvnbYQmETId8Ko6nY0LdCxwcloM4aGdy2pHURnmPTc/edit
https://ideaexchange.uakron.edu/cgi/viewcontent.cgi?article=3029&context=honors_research_projects
This is an article someone wrote about how they designed/built/tested a CO2 deployment mechanism using a solenoid
CO2 has lower pressure impulse than black powder
Discusses difficulties with sealing
Also gives approximate calculations for how to find co2 canister size
fruity chutes info: https://fruitychutes.com/files/blog/Rocketry%20Recovery%20Technology.pptx
Need a mechanism to poke hole into CO2 canister
Spring-loaded system
Spring forces may be unpredictable at higher altitudes
Vulnerable to vibrations during launch
Needed to by loaded during launch, so risk of early deployment
Solenoid
Arm attached to solenoid that moves to poke hole once
Pyrotechnic system
Still contains issues with black powder
Look into finding better way to seal
Reliable on ground, but questionable at high altitude
Servo
Valves
Powered by outside source that would open valve instead of poking a hole
Avionics potentially in nose cone depending on direction of gas canister
Need to figure out if one way is more effective for parachute deployment
Issues to test for:
Leaking of CO2
Premature puncturing
Failure to puncture
Tests should take into account low temperatures at higher altitudes, forces/vibrations during flight, etc.
Weight Imbalances from co2 canisters and co2 release mechanism
COTS CO2 Canisters:
https://www.apogeerockets.com/downloads/PDFs/CD3_Manual2009.pdf
https://www.tinderrocketry.com/rocketry-co2-ejection-system (instruction manual gives bp to co2 conversion)
Preliminary Design
Other Research