NCR/Dark Star G70?

NCR/Dark Star G70?

Post by George Bal » Thu, 16 Apr 1998 04:00:00



Has anyone heard anything "firm" on when the Dark Star G70 motors will
be available?

Thanks,
George
NAR # 72878

 
 
 

NCR/Dark Star G70?

Post by Jeff Tayl » Thu, 16 Apr 1998 04:00:00



Quote:
> Has anyone heard anything "firm" on when the Dark Star G70 motors will
> be available?

> Thanks,
> George
> NAR # 72878

No.  But who cares?  The G70 is only going to be %25 bigger than the F62.
You'll hardly notice the difference.

JT

 
 
 

NCR/Dark Star G70?

Post by Cw iceb » Fri, 17 Apr 1998 04:00:00


Quote:
><HTML><PRE>Subject: NCR/Dark Star G70?

>Date: Wed, Apr 15, 1998 17:00 EDT

>Has anyone heard anything "firm" on when the Dark Star G70 motors will
>be available?

>Thanks,
>George
>NAR # 72878

George,

It's suspost to be released this spring but the F62 is basically a G and the
G70 will not be much bigger if you look at the thrust curves on the back of a
pak of F62's, they should also be more expensve. The F62's are already $11.00 a
pop here

Christopher D. Williams
NAR#  getting very soon (hopefully)
TRA# nope
MSRS# 37

NO SPAM MAN

 
 
 

NCR/Dark Star G70?

Post by Tom Binfor » Sat, 18 Apr 1998 04:00:00


Quote:

> ><HTML><PRE>Subject: NCR/Dark Star G70?

> >Date: Wed, Apr 15, 1998 17:00 EDT

> >Has anyone heard anything "firm" on when the Dark Star G70 motors will
> >be available?

> >Thanks,
> >George
> >NAR # 72878

> George,

> It's suspost to be released this spring but the F62 is basically a G and the
> G70 will not be much bigger if you look at the thrust curves on the back of a
> pak of F62's, they should also be more expensve. The F62's are already $11.00 a
> pop here

You might as well use an Aerotech G80. More power for the same price as
a G70 would be.
Tom
 
 
 

NCR/Dark Star G70?

Post by Mark D. Cord » Sat, 18 Apr 1998 04:00:00


On 17 Apr 1998 01:29:47 Tom Binford wrote about "Re: NCR/Dark Star G70":

Quote:


> > ><HTML><PRE>Subject: NCR/Dark Star G70?

> > >Date: Wed, Apr 15, 1998 17:00 EDT

> > >Has anyone heard anything "firm" on when the Dark Star G70 motors will
> > >be available?

> > >Thanks,
> > >George
> > >NAR # 72878

> > George,

> > It's suspost to be released this spring but the F62 is basically a G and the
> > G70 will not be much bigger if you look at the thrust curves on the back of a
> > pak of F62's, they should also be more expensve. The F62's are already $11.00 a
> > pop here

> You might as well use an Aerotech G80. More power for the same price as
> a G70 would be.
> Tom

But two dealers in town have told me that AT's won't fit in NCRs.
Can someone confirm this since I like to fly 24mm rockets, and NCR ones look good, but I have AT reload casings.

mark

 
 
 

NCR/Dark Star G70?

Post by Jon38 » Sat, 18 Apr 1998 04:00:00


Quote:

>> You might as well use an Aerotech G80. More power for the same price as<BR>
>> a G70 would be.<BR>
>> Tom<BR>
><BR>
><BR>
>But two dealers in town have told me that AT's won't fit in NCRs.<BR>
>Can someone confirm this since I like to fly 24mm rockets, and NCR ones look
>good, but I have AT reload casings.<BR>
><BR>
>mark<BR>
></HTML>

I assume that you meant 29mm motors.  AT reload casings will fit in NCR kits,
the single use 29mm motors won't.  You can easily modify NCR kits by swapping
LOC 29mm tubing for the NCR stuff.

John O'Donnell  NAR 60742  Sr. L2                                              
                                                       CSAR Sec 113
Visit my web page at http://members.aol.com/Jon3854/index.html

 
 
 

NCR/Dark Star G70?

Post by Tom Binfor » Sat, 18 Apr 1998 04:00:00


Quote:

> On 17 Apr 1998 01:29:47 Tom Binford wrote about "Re: NCR/Dark Star G70":


> > > ><HTML><PRE>Subject: NCR/Dark Star G70?

> > > >Date: Wed, Apr 15, 1998 17:00 EDT

> > > >Has anyone heard anything "firm" on when the Dark Star G70 motors will
> > > >be available?

> > > >Thanks,
> > > >George
> > > >NAR # 72878

> > > George,

> > > It's suspost to be released this spring but the F62 is basically a G and the
> > > G70 will not be much bigger if you look at the thrust curves on the back of a
> > > pak of F62's, they should also be more expensve. The F62's are already $11.00 a
> > > pop here

> > You might as well use an Aerotech G80. More power for the same price as
> > a G70 would be.
> > Tom

> But two dealers in town have told me that AT's won't fit in NCRs.
> Can someone confirm this since I like to fly 24mm rockets, and NCR ones look good, but I have AT reload casings.

> mark

Put a LOC or PML motor tube in the kit. NCR tubes are a little small. If
you've already assembled the kit, sand out the mmt untilthe reload
casing fits.
Tom
 
 
 

NCR/Dark Star G70?

Post by Jerry Irvi » Sun, 19 Apr 1998 04:00:00



Quote:

> But two dealers in town have told me that AT's won't fit in NCRs.
> Can someone confirm this since I like to fly 24mm rockets, and NCR ones

look good, but I have AT reload casings.

The 1.125" standard was adopted at LDRS-1 after years of prior use by a
small company called Composite Distribution which was the earliest 1975ish
multi-vendor HPR motor supplier.

They developed the 38mm 1.5" and the 54mm 2.125" standards.

Gary/Errortech now uses 1.130" probably because it gives him 0.005" more
casing thickness to avoid grenading.  Mean time his motors do not directly
fit in many mounts including Estes and FSI.

He had the same problem with 24mm when he was making 0.940" OD which did
nt fit in Estes tubes which require 0.938" or less.

Just Jerry

--
Jerry Irvine, Box 1242, Claremont, California USA

 
 
 

NCR/Dark Star G70?

Post by Mark Johnso » Tue, 21 Apr 1998 04:00:00


Quote:

> The 1.125" standard was adopted at LDRS-1 after years of prior use by a
> small company called Composite Distribution which was the earliest 1975ish
> multi-vendor HPR motor supplier.

1.125" goes back way farther than that...RDC Enerjets, Centuri MiniMaxes,
and even their predecessor Coasters were 1.125"...and that gets you all the
way back to 1965 or so. Don't know about the early Prodynes (the ones that
were famous for going kaboom after they'd aged a few months) but they may
have been 1.125 also.

Quote:
> They developed the 38mm 1.5" and the 54mm 2.125" standards.

I think there were some 200 and 400 lb-sec Enerjet motors as early as 1969-70
that may have been 2.125".
--
Mark Johnson                       USnail: Symbios, Inc

Voice: (316) 636-8189 [V+654-8189]         3718 N. Rock Rd.
Visit our web page: http://www.symbios.com Wichita, KS  67226
 
 
 

NCR/Dark Star G70?

Post by Jerry Irvi » Tue, 21 Apr 1998 04:00:00



Quote:


> > The 1.125" standard was adopted at LDRS-1 after years of prior use by a
> > small company called Composite Distribution which was the earliest 1975ish
> > multi-vendor HPR motor supplier.

> 1.125" goes back way farther than that...RDC Enerjets, Centuri MiniMaxes,

I believe the enerjet's were 1.125 and the minimax's were about 1.04 like
FSI F100's.  Not sure on that one.

Quote:
> and even their predecessor Coasters were 1.125"...and that gets you all the
> way back to 1965 or so. Don't know about the early Prodynes (the ones that
> were famous for going kaboom after they'd aged a few months) but they may
> have been 1.125 also.

In any case the diameters of motors were all over the map in the HPR arena
till a standard was adopted in 1982 ish.  I recall alot of ID driven (what
we now call) HPR motors with green fiberglass tubes, brown phenolic tubes
of any size people could get their hands on.  Was tough on kit makers like
USR and Ace.

The standards set by the "California contingent" finally stuck and that is
the basis for declaring this point in time as the time the standard was
set.

Estes pioneered the 24mm size as far as I can tell and it has stood the
test of time.  The 1.125" 29mm is basicly generic anyway as more
manufacturers used that size voluntarilly than any other. It was the 1.5"
and 2.125" standards set by Composite distribution which were late
standards.  Interestingly one standard which has since apparantly gone
away was the 2.5".  The only thing using that right now is a liquid and a
hybrid.

However it was replaced by the USR defined standard cloned by Kosdon and
Urinsco as well and adopted in normal copycat style by AT.

I think 3" has the potential to be a fairly universal size as it is
realistically K-N power (M if you are a crippled manufacturer limited to
short motors).

Quote:

> > They developed the 38mm 1.5" and the 54mm 2.125" standards.

> I think there were some 200 and 400 lb-sec Enerjet motors as early as 1969-70
> that may have been 2.125".

There have ben "a couple" motors of virtually every size you can think of
at least in 1/8" increments.  This does not say there is a standard.

Quote:
> --
> Mark Johnson                       USnail: Symbios, Inc

> Voice: (316) 636-8189 [V+654-8189]         3718 N. Rock Rd.
> Visit our web page: http://www.symbios.com Wichita, KS  67226

--
Jerry Irvine, Box 1242, Claremont, California USA

 
 
 

NCR/Dark Star G70?

Post by Bob Kapl » Thu, 23 Apr 1998 04:00:00


Quote:

> The 1.125" standard was adopted at LDRS-1 after years of prior use by a
> small company called Composite Distribution which was the earliest 1975ish
> multi-vendor HPR motor supplier.

huff. puff. huff. puff.

A quick trip down and up the stairs produces the following results from the
"Bob Kaplow Rocket Museum":

Motor           OD
----------      ----
AT expendable   1.135
Coaster         1.08
Enerjet 8       1.13
Enerjet         1.135
MiniMax         1.13
NCR Impulse     1.125   pre estes prototype
Prodyne         1.00
Uproar          1.135   80s composite from penrose - enerjet clone

        Bob Kaplow      NAR # 18L       TRA # "Abort, Retry, Fail?"

Kaplow Klips:   http://members.aol.com/myhprcato/KaplowKlips.html
NIRA:           http://ourworld.compuserve.com/homepages/Mark_Bundick/LAUNCH.HTM