Solid Motor Propellant

Solid Motor Propellant

Post by bill nels » Tue, 26 Apr 1994 15:00:26




: I am interested in mixing a stable solid fuel with high Impuse and
: a long shelf life. Possibly Asphalt Based???? Any help, suggestions
: or comments or potential sources would be greatly appreciated.  

The standard is ammonium perchlorate and PB ***, possibly with
aluminum (as well as burn rate modifiers) added.  The Isp runs from
about 180 to 230, depending on formulation.

I believe Firefox sells information on such composite propellants.
I know they sell the tooling and the chemicals.

Bill

 
 
 

Solid Motor Propellant

Post by Greg Depu » Wed, 27 Apr 1994 22:03:28



: I am interested in mixing a stable solid fuel with high Impuse and
: a long shelf life. Possibly Asphalt Based???? Any help, suggestions
: or comments or potential sources would be greatly appreciated.  

In high power rocketry, most of the solid engines used are based on
ammonium nitrate and HTPB. (Thats hydroxl-terminated polybutadine, I
think)  These motors have both high impulse and long shelf life.  Both
the oxidizer and the HTPB are commercially available.

Greg

 
 
 

Solid Motor Propellant

Post by Willia » Fri, 29 Apr 1994 01:37:33


    In high power rocketry, most of the solid engines used are based on
    ammonium nitrate and HTPB.

Ammonium perchlorate, actually...

The new NCR engines use Potassium perchlorate and PVC...

BillW

 
 
 

Solid Motor Propellant

Post by bill nels » Fri, 29 Apr 1994 14:50:40



: : I am interested in mixing a stable solid fuel with high Impuse and
: : a long shelf life. Possibly Asphalt Based???? Any help, suggestions
: : or comments or potential sources would be greatly appreciated.  
:
: In high power rocketry, most of the solid engines used are based on
: ammonium nitrate and HTPB. (Thats hydroxl-terminated polybutadine, I
: think)  These motors have both high impulse and long shelf life.  Both
: the oxidizer and the HTPB are commercially available.

Actually, that is ammonium perchlorate.

Bill

 
 
 

Solid Motor Propellant

Post by Peter G. Olivo » Fri, 29 Apr 1994 20:14:25


Quote:


>: I am interested in mixing a stable solid fuel with high Impuse and
>: a long shelf life. Possibly Asphalt Based???? Any help, suggestions
>: or comments or potential sources would be greatly appreciated.  

>In high power rocketry, most of the solid engines used are based on
>ammonium nitrate and HTPB. (Thats hydroxl-terminated polybutadine, I
 ^^^^^^^^ ^^^^^^^
>think)  These motors have both high impulse and long shelf life.  Both
>the oxidizer and the HTPB are commercially available.

Listen, I'm the biggest advocate around here of using homebrew engines as a
way to improve the gene pool, but don't stack the deck against the guy, it's
ammonium perchlorate.
--


 
 
 

Solid Motor Propellant

Post by Paul Die » Sat, 30 Apr 1994 02:16:25



 > The new NCR engines use Potassium perchlorate and PVC...

PVC is formed as a plastisol, a mixture of very fine PVC particles
and a plasticizer that, when heated, congeals into a solid mass.

What plasticizer does NR use?  It can make up a significant fraction
of the mass of the binder.

        Paul

 
 
 

Solid Motor Propellant

Post by Michael Matthew Gusli » Sat, 30 Apr 1994 01:51:21


Quote:

>The new NCR engines use Potassium perchlorate and PVC...

Speaking of the new NCR eng... mot.. whooshgenerators, what is their
current status?  I'm getting quite anxious!

Wait - I guess I won't need to be 21 to fly high power!  I just have
to use a reloadable!  Ha ha!      Wait...  Are any reload slugs >62.5
grams?

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IRC: HaveBlue            TIP #112                 "Do not taunt Happy Fun Ball"
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Solid Motor Propellant

Post by bill nels » Sat, 30 Apr 1994 01:16:39




:
: >The new NCR engines use Potassium perchlorate and PVC...
:
: Wonder if they burn blue (from the PVC).

PVC is used as a chlorine donor for color intensification in
pyrotechnics.  It does not really provide color by itself. The
potassium would produce a violet flame, which tends to appear
white during the daytime, or when you are close to it.

Bill

 
 
 

Solid Motor Propellant

Post by Iskandar Ta » Sat, 30 Apr 1994 00:11:19



Quote:

>The new NCR engines use Potassium perchlorate and PVC...

Wonder if they burn blue (from the PVC).

--
-------------------------------------------------------------------------------
Iskandar Taib                          | The only thing worse than Peach ala


 
 
 

Solid Motor Propellant

Post by Steve Hendr » Sat, 30 Apr 1994 09:26:03



|>
|>  > The new NCR engines use Potassium perchlorate and PVC...
|>
|> PVC is formed as a plastisol, a mixture of very fine PVC particles
|> and a plasticizer that, when heated, congeals into a solid mass.
|>
|> What plasticizer does NR use?  It can make up a significant fraction
|> of the mass of the binder.
|
PVC!!  Does this mean I will need a license from the BATF to buy, store and
transport tubing for my sprinkler system?
 
 
 

Solid Motor Propellant

Post by Willia » Sat, 30 Apr 1994 08:36:11


    : >The new NCR engines use Potassium perchlorate and PVC...
    :
    : Wonder if they burn blue (from the PVC).

    PVC is used as a chlorine donor for color intensification in
    pyrotechnics.  It does not really provide color by itself. The
    potassium would produce a violet flame, which tends to appear
    white during the daytime, or when you are close to it.

Based on the descriptions of the burn characteristics, It sounded to me
as though several of the Aerotech reloads were not HTPB based.  Eg:

        BlackJack       = AP + ***
        BlueThuder      = AP + PVC
        WhiteLightning  = AP + HTPB

Or is it just relatively minor amounts of special additions that changes
the burn characteristics do dramatically?

BillW

 
 
 

Solid Motor Propellant

Post by Xiaoyi Eve Zhan » Sat, 30 Apr 1994 20:54:08


Speaking of KP composites:

The new BATF regulations could make KClO4 propellants less practical.
They deliver only 70-75% of the Isp of NH4ClO4 propellants, so high
range G's are problematic. Also, they burn much hotter than AP
composites, so their use in reloadables is also problematic. With low
Isp and without the segmentation dodge (unless the technology is better
than I judge it to be) the G-I range is going to be tough to fill. Below
that is no problem, and above that, all motors will be over-regulated.

-Larry C.

 
 
 

Solid Motor Propellant

Post by bill nels » Sun, 01 May 1994 01:23:04


:
:     PVC is used as a chlorine donor for color intensification in
:     pyrotechnics.  It does not really provide color by itself. The
:     potassium would produce a violet flame, which tends to appear
:     white during the daytime, or when you are close to it.
:
: Based on the descriptions of the burn characteristics, It sounded to me
: as though several of the Aerotech reloads were not HTPB based.  Eg:
:
:       BlackJack       = AP + ***
:       BlueThuder      = AP + PVC
:       WhiteLightning  = AP + HTPB
:
: Or is it just relatively minor amounts of special additions that changes
: the burn characteristics do dramatically?

There is no reason that AP/*** has to burn black. Note that this is the
formulation used in the shuttle boosters.

The burn rate can be varied quite a bit by varying the fuel/oxidizer ratio.
I do not know what method Aerotech uses.

Bill

 
 
 

Solid Motor Propellant

Post by Peter G. Olivo » Sun, 01 May 1994 04:33:03



Quote:

>    : >The new NCR engines use Potassium perchlorate and PVC...
>    :
>    : Wonder if they burn blue (from the PVC).

>    PVC is used as a chlorine donor for color intensification in
>    pyrotechnics.  It does not really provide color by itself. The
>    potassium would produce a violet flame, which tends to appear
>    white during the daytime, or when you are close to it.

>Based on the descriptions of the burn characteristics, It sounded to me
>as though several of the Aerotech reloads were not HTPB based.  Eg:

>    BlackJack       = AP + ***
>    BlueThuder      = AP + PVC
>    WhiteLightning  = AP + HTPB

>Or is it just relatively minor amounts of special additions that changes
>the burn characteristics do dramatically?

Yes.  ;)
--


 
 
 

Solid Motor Propellant

Post by Lee Re » Sun, 01 May 1994 05:58:26



[...]

: Wait - I guess I won't need to be 21 to fly high power!  I just have
: to use a reloadable!  Ha ha!      Wait...  Are any reload slugs >62.5
: grams?

The Aerotech motor data sheet list the G33 Black Jack reload for the
29/40-120 RMS at 72.2 gms.  I heard that it will finally get released,
but with two propellant slugs to keep slug weight under 62.5 gms.

--
         /\       Lee Reep                    voice: 303/229-2010
    /\  /~~\  /\   Fort Collins, Colorado                TRA 2007

__/____\____/___/~~\_____________________________________________