Tad,
How did you get this?
-12 inch long 2 inch diameter 1 inch core with total propellant mass of 806
grams:
3.14159/4 x (25.806cm - 2.54cm) x 30.48cm = 556.96281 Total Volume
806/556.96281 = 1.4471 g/cm3 (Actual Density of propellant in question)
https://www.calculator.net/volume-calculator.html?ctankradius=1.27&ctankradiusunit=centimeters&ctanklength=30.5&ctanklengthunit=centimeters&cylcal=Calculate#cylinder
Using 806 grams, I got 1.74 g/cm3 using 463 total volume. That yields ~94.5%
On Sunday, November 22, 2020, 04:37:03 PM PST, Kelly Jones
<kellyjones1@xxxxxxxxx> wrote:
I agree with your comments on compression. Assuming a pressure of 30psi, this
would tend to compress the voids to about one-third their original volume -
which helps the situation, but doesn't eliminate the problem. I use pressure
because, for the materials I use, it seems to aid in adhesion to the liner.
On Sun, Nov 22, 2020 at 1:11 PM Rick Maschek <dmarc-noreply@xxxxxxxxxxxxx>
wrote:
Lots of people have indicated using compression eliminates voids. Unless
someone does some really detailed examination, my experience with using
compression from 5 to 50 pounds depending on the motor size, does decrease the
size of the 'voids' but does not eliminate them.
