John,
Yup, can be all sorts of issues from micro voids to larger voids, to
powdery areas, to channels and tunnels or delaminated regions of the casting
often resulting in a penetration of the nominal burn surface.
Troy
-----Original Message-----Behalf
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> On
Of John Stoffelburn
Sent: Wednesday, February 22, 2023 8:02 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Subject: Re: S-26.500 KNSB Sugar Shot test tomorrow
"Troy" == Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx> writes:
In composite propellant, 94% theoretical/measured density ratio can
produce burn profile anomalies depending on chamber pressure. Never
really did much analysis of that when I was playing with candy
although I know that 90% and below is definitely concerning.
Is that because the lower density leads to voids which would increase the
area in a random way, driving pressure spikes?