are all rocket completed seal? how to eject the payload without the use of delay charges ( pyro power)?
or
by means of the electronic control the use of canister full of CO2 to thrust out the payload whenever it reaches the apogee.
is there any DIY apogee delay timer or schematics?
Huh? Yes. DAGS
All your rocket are belong to us!
Hello! I'm not sure what you mean. Your English is a bit uneven -- but it's a lot better than my Chinese!
Are you asking if the rocket motors are a sealed unit? Single-use motors are sealed, though in some cases it is possible to remove the ejection charge.
You can use an electronic timer, an altimeter, or other type of electronic device to fire an ejection charge. Usually this would be a black powder charge, ignited by an electric match.
There is a device on the market that does this. Check out
I'm sure there are timer schematics available online, but I don't know of a specific link to recommend.
=AE
Here is some exemple of a non pyro ejection system.
And here is another one (in french)
And finally:
Schematic for a timer (for ejection charges)
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