capture data on 21 May propellant batch

diff --git a/rockets/research/2019.01.07.mdwn b/rockets/research/2019.01.07.mdwn
index dae4d228782757655d340891803d34ded6e498b1..7152a3d9fb794254c764aca21e94ade75b2ffe17 100755 (executable)
--- a/rockets/research/2019.01.07.mdwn
+++ b/rockets/research/2019.01.07.mdwn
@@ -1,6 +1,6 @@
 # Batch 2019.01.07 #
 
 # Batch 2019.01.07 #
 

-4 Terry-length Everyclear grains for 54mm cases, with 0.625 inch cores, 
+4 Terry-length Everclear grains for 54mm cases, with 0.625 inch cores, 

 cast as two 6-inch-long double grains with 0.5" delrin coring rods, then 
 cut, cored, and trimmed as necessary.
 
 cast as two 6-inch-long double grains with 0.5" delrin coring rods, then 
 cut, cored, and trimmed as necessary.
 

diff --git a/rockets/research/2019.01.08.mdwn b/rockets/research/2019.01.08.mdwn
index 0112b4beb154a4cf48a975cf70ec18a881cbc5e9..569fa8b16f5d099709dc6e09f2a153e555bc6211 100755 (executable)
--- a/rockets/research/2019.01.08.mdwn
+++ b/rockets/research/2019.01.08.mdwn
@@ -1,34 +1,25 @@
-# Batch 2019.01.08 #
+# Batch 2019.05.21 #

 
 

-4 Terry-length Everyclear grains for 54mm cases, with 0.625 inch cores, 
-cast as two 6-inch-long double grains with 0.5" delrin coring rods, then 
+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.
 
 The 54mm casting tube I'm using weighs 1.84g per inch.
 
 cut, cored, and trimmed.
 
 The 54mm casting tube I'm using weighs 1.84g per inch.
 

-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
+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 2019-01-08.
+These grains were cast on 2019-05-21.

 
 ## Results ##
 
 
 ## 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.  The excess
-weighed in at 17.9g after cure.

 
 

-* Grain 1, 2.980" long, 162.6g gross, 5.48g casting tube, 157.12g net
-* Grain 2, 2.970" long, 162.0g gross, 5.46g casting tube, 156.54g net
-* Grain 3, 3.010" long, 164.7g gross, 5.54g casting tube, 159.16g net
-* Grain 4, 2.995" long, 163.6g gross, 5.51g casting tube, 158.09g net
-
-The mass per unit length was within 0.1g/inch, which seems awesome.
-
-In total for this batch and the previous day's, which were post-processed 
-together at the same time, there was 10.4g sanded off the grain ends and
-64.7g of waste from core drilling the 0.5"-ish holes to 0.625".  Really
-leaves me wondering if it wouldn't be better to just start with the right
-size coring rod for future batches and avoid the coring waste.  Might leave
-me wanting to rough the cores for better ignition?  But, maybe not.  Something
-to ponder more.
+* 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

 
 

diff --git a/rockets/research/2019.05.21.mdwn b/rockets/research/2019.05.21.mdwn
new file mode 100755 (executable)
index 0000000..cbe221f
--- /dev/null
+++ b/rockets/research/2019.05.21.mdwn
@@ -0,0 +1,44 @@
+# 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.
+

diff --git a/rockets/research/index.mdwn b/rockets/research/index.mdwn
index 1cf9f980ceef6caf14e265e769256cee95868521..c3ddb9b2289b59e1969eb9a4b7fff3fb02d38862 100755 (executable)
--- a/rockets/research/index.mdwn
+++ b/rockets/research/index.mdwn
@@ -14,6 +14,7 @@
 * [2019 batch 01](2019.01.07.html) - 7 January 2018 - 4 54mm Everclear APCP grains
 * [2019 batch 02](2019.01.08.html) - 8 January 2018 - 4 54mm Everclear APCP grains
 * [2019 test 01](2019-test-1.html) - 28 April 2018 - 2-grain 54mm Everclear on test stand
 * [2019 batch 01](2019.01.07.html) - 7 January 2018 - 4 54mm Everclear APCP grains
 * [2019 batch 02](2019.01.08.html) - 8 January 2018 - 4 54mm Everclear APCP grains
 * [2019 test 01](2019-test-1.html) - 28 April 2018 - 2-grain 54mm Everclear on test stand

+* [2019 batch 03](2019.05.21.html) - 21 May 2018 - 16 54mm Everclear APCP grains

 
 ### 2018 ###
 
 
 ### 2018 ###