rec.models.rockets Google Group

Re: Series 2 Engines

s...@ug.the.orc (Smaug Ichorfang) — Sat, 06 Sep 2008 17:39:16 UT

shreadvector <fred.e.shec...@alum.mit.edu> wrote in
Looking into the nozzle of a vintage, unfired Centauri B14-0 (date code
8J10), I see a stepped nozzle. I also see an irregular "smear" of clay
around the bore which makes me think the core was formed on a pintle rather
than drilled as I have always heard. I don't have a boresight handy but I

Re: Series 2 Engines

fred.e.shec...@alum.mit.edu (shreadvector) — Fri, 05 Sep 2008 14:07:11 UT

I am almost 100% positive that there were Centuri (made in Phoenix,
not Penrose) B14 motors that had a large smoothly tapered centerbore
which was different than the Estes stepped centerbore. The Centuri
centerbore looked like a B8 or C5 centerbore only larger/deeper. The
Estes motors looked just like their cutaway diagrams. Let's see if I

Re: Series 2 Engines

doug_man_s...@yahoo.com (plano-doug) — Thu, 04 Sep 2008 20:29:12 UT

Sorry if I wasn't clear enough. I was trying to say that it was
initially formed (rammed) using a pintle from one of the other motors
(eg B6 or C6), then it was drilled to the larger, deeper core of the
B14.
BTW, here's a pic I took comparing the B14 and the B8.
[link] The B14 nozzle

Re: Series 2 Engines

prfes...@hotmail.com (Terry) — Thu, 04 Sep 2008 18:57:39 UT

On Tue, 2 Sep 2008 15:24:52 -0700 (PDT), plano-doug
Hello Doug,
Hmmm... I've heard this story before but it doesn't fit my
recollection. I wasn't able to afford much in the way of rocket
motors way-back-when, so when the 9th grade rocket club got some B14s
and some C6s, I took a close look. The B14 nozzle had a visibly

Another glue thread

bobkap...@yahoo.com (Bob) — Thu, 04 Sep 2008 03:42:31 UT

Just saw this on a f/f newsgroup and thought I'd repost it here:
[link]

Re: Series 2 Engines

s...@garbage.com (Q) — Wed, 03 Sep 2008 20:40:51 UT

Joe schreef:
The B14 was a cool engine. One of my favorites.
I can clearly remember launching my Estes Trident on a
B14-7. The delay was about 3 seconds longer than it should have been.
It ejected just fine and landed safely, 27 years ago.
It just popped up as soon as I read your post.
When you're ready there is at least one customer waiting in Holland :)

Re: Series 2 Engines

fred.e.shec...@alum.mit.edu (shreadvector) — Wed, 03 Sep 2008 15:28:14 UT

Yes, it could become known as the "C11".
;)

Re: Series 2 Engines

josephgri...@yahoo.com (Joe) — Wed, 03 Sep 2008 09:23:47 UT

On Tue, 02 Sep 2008 18:31:32 -0400, Joe <josephgri...@yahoo.com>
wrote:
My concept revolves around a BP motor the size of an Estes D-12.

Re: Series 2 Engines

nos...@crashelex.com (Gordon S. Hlavenka) — Wed, 03 Sep 2008 03:48:27 UT

Joe replied:
Joe, I can guarantee you at least one customer. I'm guessing there are
more :-)

Re: Series 2 Engines

doug_man_s...@yahoo.com (plano-doug) — Tue, 02 Sep 2008 22:35:57 UT

When you're ready, you just tell us where to send the checks, and
we'll gladly purchase them :)
Doug

Re: Orion Prangs

josephgri...@yahoo.com (Joe) — Tue, 02 Sep 2008 22:35:26 UT

On Wed, 27 Aug 2008 18:55:06 -0700 (PDT), Roger Coppock
My sources tell me that this is actually Soyuz 1 landing

Re: Series 2 Engines

josephgri...@yahoo.com (Joe) — Tue, 02 Sep 2008 22:31:32 UT

On Tue, 2 Sep 2008 15:29:57 -0700 (PDT), shockie
If I have my way, they may rise again

Re: Series 2 Engines

shockwaverid...@gmail.com (shockie) — Tue, 02 Sep 2008 22:29:57 UT

The B3-X motors were originally developed in the spring/summer of
1961 and were demoed at NARAM-3 in August 1961 as B16. The B16
lasted for approx. 2-3 years before becoming B3. .They were
redesignated as B14 in 1968 in the english to metric change that took
place. The B14 lasted at Estes thru 1979 and Centuri thru 1981.

Re: Series 2 Engines

doug_man_s...@yahoo.com (plano-doug) — Tue, 02 Sep 2008 22:24:52 UT

B14 was the metric designation for the B3 (14 newtons ~= 3 pounds).
This motor had a drilled core. The core was formed using the same
pintle as the C6, as I understand it. Then it was drilled to the
deeper, larger size. There was significant risk in the drilling and
it apparently caused problems on more than one occasion. (Hot drill

Series 2 Engines

josephgri...@yahoo.com (Joe) — Tue, 02 Sep 2008 21:44:23 UT

During the 60s, Estes had a "series 2" type of motor listed as a
B-3-0, B-3-5, and B-3-7. Later designations were B-14-0, B-14-5.
B-14-7. These motors has a core running through them and produced a
"sledgehammer thrust" of about 9 lbs. Why and when did thesemotors
stop being produced?