# Batch 2019.05.21 #

A total of 16 Terry-length Everclear grains for 54mm cases, with 0.625 inch 
cores, cast as 2 batches of 4 6-inch-long double grains with 0.5" delrin 
coring rods, then cut, cored, and trimmed.  Grains 1..8 cast by Bdale, grains
9..16 cast by Jamie and Luke with Terry observing.

The 54mm casting tube I'm using weighs 1.84g per inch.

Third time mixing APCP propellant.  Bdale again used the 4.5qt mixer, Jamie
and Luke used Terry's mixer, all hand packed with no vacuum processing.  Same 
formula as previously, but with quantities doubled.

Most materials measured with Bdale's new 600g by 0.01g scale, R45 measured
straight into mixing bowls using Terry's larger scale that goes by 1g.

These grains were cast on 2019-05-21.

## Results ##

The batch size was pretty good, there was a bit of excess propellant in each
batch so we can make density and burn rate measurements after cure.  The excess
weighed in at g after cure.

* Grain 1, " long, g gross, g casting tube, g net
* Grain 2, " long, g gross, g casting tube, g net
* Grain 3, " long, g gross, g casting tube, g net
* Grain 4, " long, g gross, g casting tube, g net
* Grain 5, " long, g gross, g casting tube, g net
* Grain 6, " long, g gross, g casting tube, g net
* Grain 7, " long, g gross, g casting tube, g net
* Grain 8, " long, g gross, g casting tube, g net

* Grain 9, " long, g gross, g casting tube, g net
* Grain 10, " long, g gross, g casting tube, g net
* Grain 11, " long, g gross, g casting tube, g net
* Grain 12, " long, g gross, g casting tube, g net
* Grain 13, " long, g gross, g casting tube, g net
* Grain 14, " long, g gross, g casting tube, g net
* Grain 15, " long, g gross, g casting tube, g net
* Grain 16, " long, g gross, g casting tube, g net

The mass per unit length was within ?g/inch.