Model Forum / General / Rockets / March 2005

OK guys, I'm finishing up my PML 1/4 Scale Patriot.  Just one thing --
it weighs a ton more than it ought to.
The specs say that it weighs in at 50 oz., however, I didn't weigh the
components before assembly.

Just noticed on the link that David E-W posted earlier, that Ellis Mountain
Motors don't appear on the NAR certified list.
They are however on the Tripoli list.
Does that mean I cannot Level 1 certify with an EM H50 if I am only a NAR

Howdy all,
I lost the film door coverplate on my AstroCam during a flight, and was
wondering if anyone out there had and extra I might be able to acquire...
-- BG

  Being a BAR starting the end of last season and having only lost one
of the Estes micro rockets on an A10 I consider myself lucky out of the
50 or so launches attempted.  Have read the FAQ's in rec.model.rockets
and purchased a bale of that shredded paper insulation that is ...

Hey, guys!
Just got the April issue of Popular Mechanics in the mail.  The COVER
story is about ROC stock, and 'extreme hobbies'.
Pick it up and take a look!

Maybe I'm missing something here, but doesn't Tripoli's Junior Certification
Program pale in comparison to NAR's??
Tripoli's allows Jr members to fly F & G motors with supervision (last I
checked folks under 18 could buy F motors in most of the US anyway) where

I bought some "Davey-clone" igniter chips, "Extra Low Voltage"
non-conductive primer (black), and "Pyromag" pyrogen (reddish) from
Firefox recently. Put together about 35 igniters, and can't get them to
fire. They show continuity but won't ignite on a 9v battery. I soldered

I'm working up to Level 1, scratch building a 4" hybrid powered bird. I'm
interested in using a dual deployment system that employs a standard
pyrotechnic charge to separate the nose cone and deploy a pilot chute at
apogee, then at altitude a mechanism releases the main allowing the ...

Well, its been about 4 years since I last posted to RMR.  I was on
"hiatus"  but after helping a 10 year old launch an Estes RTF model the
past weekend...well the thrill was all too much :)
Anyway, looking for a NAR chapter in or around Northern Delaware with

I must be one of the few people who still uses the Fehskens-Malewicki
equations.
I have used them as refinements, in each interval, to digital calculations,
and

I don't think these are your standard altimeter questions, but here goes...
How many readings (and at what rate) do folks typically store for a
flight with an altimeter?  How many bits resolution?
Same question for those of you doing motor testing -- when I look at the

Sorry for the dumb question, but at the last launch I left behind a box with
4 igniters that came with the Cesaroni pro38 reloads. I was told not to use
a "HOT" igniter to replace the lost ones, what would you recommend as a
replacement e-match? I do not have an ATFE LTC so I'm ...

I seem to recall a recent discussion/advertisement about a tower
launcher, but can't seem to find it.
So, can anyone recommend a good tower launcher (or plans to build one --
though I'm not really a 'metal worker')?

Does anyone know which of the balsa pieces, if any, need to be
rounded? Estes is unclear on this point.
Also,anyone else have trouble with the plastic cement melting the
tailcone and leaving little depressions?

RockSim Database Updated
March 3, 2005
Web posted at: 1:07 PM EST
(ROL Newswire) --  Apogee Components has updated the RockSim engine