Russell,

FWIW, I never doubted Bill.  I DID doubt my memory, as it was oh 15
some years ago I was at Kennedy as a tourist and asked that question.
I like the 11ksi pressure rating; good thing they made it cylindrical.

Gustaf


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Russell McMahon
> Sent: Monday, March 01, 2004 11:57 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [OT:] Chemical discussions (was RE: ] My first PCB
> production)
>
>
> > That's interesting.  I spoke with a representative of NASA one time
> > at Kennedy Space Flight Center.  I asked him what the solid booster
> > fuel was; he said "ammonium nitrate and aluminum powder in a rubber
> > bonding matrix."
>
>
> It's ammonium perchlorate plus aluminium in a rubber matrix
>
> And, FWIW:
>
>
> Space Shuttle:
> SRBs Al 16%,
> Ammonium Perchlorate  69.83%,
> Iron Oxide (catalyst) 0.17%,
> Binder & Curing 14%)
>
> Binder is PBAN (polybutylacrylonitrile =- slightly less Isp than now more
> common HTPB
>
> 2,650,000lbf at launch 2 minutes burn,
> 149 feet x 12 ft dia.
> 1,300,000 lbm at launch
>
> Space Shuttle SRB specification.
> Total Propellant Weight     1106280 lbf
> Total RSRM weight           1255592 lbf
> Max thrust vacuum           3060000 lbf
> Burn time                   123.7 sec
> Assembled motor length      1513 inch
> Case diam                   146 INCH
> Prop mass fraction - motor  88.2%
> Templimits                  40 F to 120 F
> Chamb pressure max / avg    910 / 662 psia
> Specific impulse altitude   268.2 sec
> Burn rate                   0.434 in/sec
> % liftoff thrust            71.4%
> RSRM nozzle characteristics
> Type                    Contoured or Bell
> TVC                     Flexible bearing - 8 deg from centreline Expansion
> area ratio    7.72
> Throat diam             53.86 inch
> Exit diameter           178.75 inch
> Nozzle weight           23,941 lbf
> Max pressure            1,1016 psi ???
> Materials               9 liners carbon cloth phenolic
>                               Bonded to 6 steel & Al housings.
>
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