My rockoons had high expansion nozzles. These where short burn motors
though and not difficult. However do not forget there is less heat
transfer and make your nozzle too thin at the throat.
-------- Original Message --------
Subject: [AR] Question for the solids guys...
From: Paul Breed <paul@xxxxxxxxxx>
Date: Tue, December 01, 2015 6:30 pm
To: arocket@xxxxxxxxxxxxx
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
)
