I'm still digging into a cold-release mechanism (or minimally pyrotechnic)
for main chute deployment, and while I've found a couple items (Blacksky's &
Defy Gravity's) neither is quite what I want... overkill for my application.
The DefyGravity tether looks like it would blow my 4" rocket apart, and
Blacksky's rig seems overly complex (and pricey). Lacking any other method
I'll use a parachute burrito, but I have a "vision" of what I want to
accomplish, and that isn't it.
I've a couple ideas, but one key thing I don't really know.... what is the
actual load on a parachute during descent? Is it simply the weight of the
rocket? I understand that transient stresses and shock loading will be more
than that (perhaps substantially more), but the working, constant load is my
interest. If the load is simply the weight of the rocket, then a cold
release mechanism for a rocket weighing 5 pounds is not a big deal.
Has anyone ever done a system in which the main chute is deployed but
reefed, acting as a drogue until deployment altitude, when a sliding reef is
released and the chute allowed to fill? Not sure it could be easily
accomplished, but heck, I figure it doesn't hurt to ask,...
Can anyone point me to a "parachute geeks" book or page so I can get
seriously silly about this issue? I've looked at many of the rocketry
related sites but have not found the depth of info I desire.
TIA for any suggestions.
- posted 17 years ago