Shock cord

Shock cord

Post by The Silent Observe » Fri, 27 Dec 1996 04:00:00



Quote:

> BTW, is most of the discussion in this group oriented towards small model
> rockets? Was just wondering who the audience is out there.

We get strictly modroc types (like me, so far), LMR sorts, and HPR
specialists, as well as many folks who, like Bob K, build and fly
whatever they have space, time, and money to pursue.

OTOH, I think most of us know enough about the way things work to
recognize that discussion of quick links made with 1/8" wire doesn't
pertain to models in the Ninja size class...  B)

--
+----------------------------------------------------------------------+
| There are two kinds of fool.  One says, this is old, and therefore   |
| good, and one says, this is new, and therefore better.               |
|                                  John Brunner, _The Shockwave Rider_ |
+----------------------------------------------------------------------+

| Rocket Pages           http://members.aol.com/silntobsvr/modrocs.htm |
+----------------------------------------------------------------------+
| All opinions expressed are my own, and should in no way be mistaken  |
| for those of anyone but a rabid libertarian.                         |
+----------------------------------------------------------------------+

 
 
 

Shock cord

Post by Jeff Vince » Fri, 27 Dec 1996 04:00:00



Quote:
>BTW, is most of the discussion in this group oriented towards small model
>rockets? Was just wondering who the audience is out there.

   It's a pretty mixed bag.  Some contest guys might be talking about
a 1/4A model at 0.25 ounce GLM and some high-power guys might be
talking about a 100+ pound behemoth.  *All* of us have be careful in
our language when we say (for example) "you should use x shock cord
for your models" -- that may apply to a certain power range, but
unless you're specific its easy to misinterpret (particularly for
someone with limited experience).

  One of the most interesting things about rocketry is the vast
variety in scale available.  If you do contest stuff (as I do) and you
optimize your models, you come to appreciate the power differences and
strength requirements -- going as little as one engine class up or
down may mean the model is underpowered/inefficient or shredded on
boost.


Pick one or more: Model Rockets (competition-NERCB) / PCs (even Atari!) /
Papyrus ICR-ICR2-NCR / Who needs a life when you have multiple non-lives?

 
 
 

Shock cord

Post by Bob Kapl » Fri, 27 Dec 1996 04:00:00



Quote:

>> BTW, is most of the discussion in this group oriented towards small model
>> rockets? Was just wondering who the audience is out there.

> We get strictly modroc types (like me, so far), LMR sorts, and HPR
> specialists, as well as many folks who, like Bob K, build and fly
> whatever they have space, time, and money to pursue.

I took a quick glance at the early returns on the surveys. There are several
"estes rocketeer"s, and a good number of folks with a wide range. For example I
flew 1/4A thru I last year, totalling 10 ranges (I missed H). At least 3
posters flew 12 of the 15 classes in my survey. Only two responders so far flew
no "estes rocket" stuff, and only LMR/HPR. I'll try and summarize this
breakdown in my final report too.

Only 40% of the responses are from what I would consider regulars on RMR. I'll
have to get with Bob Wiersbe on his 1996 RMR posting statistics, and compute a
grand champion rocketeer (flights x posts or flights + posts), and see who the
big winner is.

 
 
 

Shock cord

Post by pauldim.. » Sat, 28 Dec 1996 04:00:00



Quote:

>BTW, is most of the discussion in this group oriented towards small model
>rockets? Was just wondering who the audience is out there.

No, it's not oriented towards model rockets although the majority of the
technical threads lean toward model rocketry.  I find that there appears
to be an even mix of model and HPR threads.  I'll discount the political
threads since they usually involve TRA/NRA or HPR related activities.
Folks in those discusions tend to be also involved in HPR.  

Keep in mind the readership appears (in my opinion) evenly split.  There's
a lot of folks that come and go.  Some model rocketeers, some HP
rocketeers.  Bottom line: Lots of transients of both flavors.  As you
start a new thread or post a response, keep in mind that model and HPR
folks will be reading it.  If you are proposing something that pertains
more to HPR, qualify it and vice versus.  It helps people skip threads and
posts that don't apply to their interests.  

Don't be surprised if an idea is examined in the n'th detail.  There are
many folks here with a lot of experience and who enjoy understanding the
details.  Remember, there is much to learn.

BTW, I enjoy reading any one's suggestions and continue to evaluate
whether their ideas can help me.  Thanks for posting to RMR!

Paul.

Fly Baby Fly!

 
 
 

Shock cord

Post by John H. Cato, Jr » Sat, 28 Dec 1996 04:00:00


Quote:

> The same goes, to a lesser extent, using 10 lb. test swivels on my Big
> Bertha, which weighs about 3 ounces dry.  10 lb. comes to something like
> 50 G!

Silent, some of my literature on recovery systems reports that 'g
loadings' for reefing line cutters have exceeded 1000 G's (three
zeros).  To be sure this was instanteous and short-lived - but it
wouldn't take any real duration for something to fail under those
conditions.  Could a 'snap swivel' see similar?  I dunno - but wouldn't
rule it out.

Quote:
> I don't see that Estes parasheet keeping its shroud lines attached
> under 10 lbs of opening force...

While I agree with this - I've also learned to assume *nothing* when it
comes to recovery - things that just don't seem POSSIBLE plainly happen
when trying to put an 'aerodynamic decelerator' out on the breeze.  I
don't know why - but recovery can challenge the most logical arguments
and make them seem like the 'ramblings of a child'.

-- john.

 
 
 

Shock cord

Post by Phil Prio » Wed, 01 Jan 1997 04:00:00


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