[AR] Re: Question for the solids guys...

  • From: David Weinshenker <daze39@xxxxxxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Tue, 1 Dec 2015 18:34:30 -0800

On 12/01/2015 05:30 PM, Paul Breed wrote:

If one was going to build a solid vacuum stage,
has anyone on this list built a flight weight high expansion ratio solid
motor?

Clearly just turning a steel or graphite solid expansion cone is either
low expansion ratio or not flight weight.
If its a simple long tubular solid the expansion cone is going to have
to be bigger than the case diameter....

Looking at professional vacuum stage solids one sees carbon carbon
expansion bells and fuel geometries that aren't the simple tubular
solids that typify the amateur solid...
Like:
http://104.131.251.97/spacerockets/wp-content/uploads/sites/17/2015/08/9166357_orig.jpg
)

See also the Vanguard third stage designs... IIRC one version had a
fiberglass composite nozzle and the other a thin-walled steel cone.

-dave w



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