capture data on 21 May propellant batch

[web/gag.com] / rockets / research / 2019.01.08.mdwn

diff --git a/rockets/research/2019.01.08.mdwn b/rockets/research/2019.01.08.mdwn
index 2d43d37e5122221ee1cb42849aa500dbe517c014..569fa8b16f5d099709dc6e09f2a153e555bc6211 100755 (executable)
--- a/rockets/research/2019.01.08.mdwn
+++ b/rockets/research/2019.01.08.mdwn
@@ -1,20 +1,25 @@
-# Batch 2019.01.08 #
+# Batch 2019.05.21 #
 
-4 Terry-length Everyclear grains for 54mm cases, with 0.5 inch cores, 
-cast as two 6-inch-long double grains then cut and trimmed.
+8 Terry-length Everclear grains for 54mm cases, with 0.625 inch cores, 
+cast as four 6-inch-long double grains with 0.5" delrin coring rods, then 
+cut, cored, and trimmed.
 
-This was my second time mixing APCP propellant.  Again used the 4.5qt mixer 
-and hand packed with no vacuum processing.  Same formula as yesterday
+The 54mm casting tube I'm using weighs 1.84g per inch.
 
-These grains were cast on 2019-01-08.
+Third time mixing APCP propellant.  Again used the 4.5qt mixer and hand 
+packed with no vacuum processing.  Same formula as previous batches.
+
+These grains were cast on 2019-05-21.
 
 ## Results ##
 
-The updated batch size was just right, there was a bit of excess propellant
-so we can make density and burn rate measurements after cure.
 
-* Grain 1, gross, g casting tube, g net propellant
-* Grain 2, gross, g casting tube, g net propellant
-* Grain 3, gross, g casting tube, g net propellant
-* Grain 4, gross, g casting tube, g net propellant
+* 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