Re: are all rocket completed seal?

Here is some exemple of a non pyro ejection system.
http://home.versateladsl.be/micheldemey/en/maxiredu.html
This rocket crashed because the shock cord failed, but the opening system
worked well.
The electronics is in fact a small self made accelerometer with a build in
timer and servo driver.

And here is another one (in french)
http://home.versateladsl.be/micheldemey/fr/maxiredu5.html
Here the electronics that control the servo is very basic: a timer
controlling a relay that switch between two resistors linked to a standard
servo driver.
(note that this rocket also crashed. The door unlocked but did not open...)

And finally:
http://home.versateladsl.be/micheldemey/club/200409/index.html
This one worked perfectly. The electronic is a servo driver and timer made
from a single 4093. I even lauched a two stage version of the same rocket,
with separation by a servo mechanism.

Schematic for a timer (for ejection charges)
http://www.nakka-rocketry.net/rtimer.html
and, even simpler:
http://members.aol.com/sspacepyro/instruct/timer.html

"computer" <us@xxxxxxxxxxxx> a écrit dans le message de
news:438ecf99$1@xxxxxxxxxxxx
> 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?
>
>
>


.

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