About CO2 ejection system

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Magin

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Hi guys! We are planing to use CO2 system for recovery but could'nt find out how much co2 we should use to lift up 300 gr nose cone.
 
Your question is a bit confusing. Lift a nose cone? You actually need to know the tube diameter and the length of the recovery bay.

The last 2 pages of this doc should be helpful. https://www.apogeerockets.com/downloads/PDFs/CD3_Manual2009.pdf

it will get you started. Other things to consider are the number and size of shear pins, how much leakage there is in the compartment and how quickly your "piercing" of the Co2 will dump the gas.

Do plenty of ground testing!!!!!!

Tony
 
Hi guys! We are planing to use CO2 system for recovery but could'nt find out how much co2 we should use to lift up 300 gr nose cone.

Is this a homebuilt system or commercial? The commercial systems contain a chart in the instructions.
 
Your question is a bit confusing. Lift a nose cone? You actually need to know the tube diameter and the length of the recovery bay.

The last 2 pages of this doc should be helpful. https://www.apogeerockets.com/downloads/PDFs/CD3_Manual2009.pdf

it will get you started. Other things to consider are the number and size of shear pins, how much leakage there is in the compartment and how quickly your "piercing" of the Co2 will dump the gas.

Do plenty of ground testing!!!!!!

Tony
thanks for ur helping :)
 
Which specific co2 system?
Actually ı don't have so much information about co2 system,ı am just searching. I dont know the diffrences between co2 system species.
 
Last edited:
Is this a homebuilt system or commercial? The commercial systems contain a chart in the instructions.
ı don't have enough experinces to build homebuild. by the way yeah ı cheched the chart and ı am planing to build my own co2 system in future :) because it's so much money when u convert dollar into turkish liras :(
 
With CO2 you don't really have to be concerned with going too large. The pressurization rate is determined by the size hole you punch in the cartridge, not the size of the cartridge. Also CO2 pressure drops fast as temperature drops. If you plan to use on a cold day, or at appreciable altitude, you need to design accordingly.

Gerald
 
I have both Tinder Rocketry's CO2 systems, 4 Peregrine systems and 2 Raptors. Assuming your rocket can accommodate both types, the better system IMO is the new Raptor. The Raptor is also more scalable.

Beyond the advice given above I couldn't recommend ground testing enough. Don't worry about burning through the cartridges they are relatively inexpensive.

Also in regards to the charge used to puncture the cartridge, regardless of which medium you decide or have access to, you really need to pay attention to the quantity used. From my experience paying attention to the details is more important with these technologies, from assembly, charge size and cleaning up, you need to be detail oriented.
 
I use the CD3 and have been happy with it. Using a shear pin in the nose cone will really blow the nosecone off. I have done ground tests and the nose cone will carry the chute out 20 feet. (horizontal test rig) There's zero chance of melting a chute. The smallest body tube I have used has been 54mm, the largest 6".
 
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