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[web/gag.com] / rockets / research / 2017-batch-04.mdwn

diff --git a/rockets/research/2017-batch-04.mdwn b/rockets/research/2017-batch-04.mdwn
index a0e376fb91815c21e68d5fcb26c8b15319df6c88..3d2ca0ab618ef23c95eddca7c573558baa86e9ab 100755 (executable)
--- a/rockets/research/2017-batch-04.mdwn
+++ b/rockets/research/2017-batch-04.mdwn
@@ -1,16 +1,25 @@
 # Batch 2017-batch-04 #
 
-4 grains of 29mm using sorbitol, intended to be a reloads for the 
-second-longest GMA 29mm snap-ring case.  Grain length 45mm with 1mm spacing 
-per grain, so we'll make the casting tubes 46mm long.  Delrin coring rods of 
-5/16" diameter.  
+4 grains of 29mm intended to be a reloads for the second-longest GMA 29mm 
+snap-ring case, *and* 6 grains of 54mm intended to be 2 3-grain reloads, all
+in one sorbitol melt.  
 
-Formula for a batch size of 135g:
+29mm grain length 45mm with 1mm spacing per grain, so we'll make the casting 
+tubes 46mm long.  Delrin coring rods of 5/16" diameter.  
 
-* 65% KNO3, 87.75g, taken from the big bucket
-* 35% Sorbitol, 47.25g
-* 1% RIO, 1.35g
-* PolyStep B1, 2 drops
+54mm grain length 76mm with 2mm spacing per grain, so we'll make the casting
+tubes 78mm long.  Delrin coring rods of 1/2" diameter.
+
+Formula for a batch size of 1kg:
+
+* 65% KNO3, 650g, taken from the big bucket
+* 35% Sorbitol, 350g
+* 1% RIO, 10.0g
+* PolyStep B1, 15 drops
+
+With left-overs from batch-01, this was enough for all but two of the 29mm
+grains.  We added enough materials for another 100g and were able to finish
+up with a bit left over.
 
 Presto Multicooker operated at 275F indicated.