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[web/gag.com] / rockets / research / test1.mdwn

diff --git a/rockets/research/test1.mdwn b/rockets/research/test1.mdwn
index 033b137b408d1888aaff6760c1e4329ad1174565..3b1ab6ba45e88380e564631d9836277252847a2f 100755 (executable)
--- a/rockets/research/test1.mdwn
+++ b/rockets/research/test1.mdwn
@@ -1,7 +1,7 @@
 # Test 1 #
 
-Robert and I decided to start out with a Sorbitol mix.  Following 
-[Scott Jolley's](http://ajolleyplace.com/scott.html) lead, Bdale procured 
+We decided to start out with a Sorbitol mix.  Following 
+[Scott Jolley's](http://ajolleyplace.com/scott.html) lead, we procured 
 a sample of Polystep-B1 surfactant to make the propellant pourable.
 
 A quick burn simulation suggested 3 grains in an Aerotech 38/360 case with
@@ -21,6 +21,8 @@ good grain after saw / knife kerfs.
 
 ## Formula ##
 
+Since we need 177 grams, let's make 200 grams of propellant in this batch.
+
 * 65% Potassium Nitrate        (130g)
 * 35% Sorbitol (70g)
 * 1% Red Iron Oxide, added post-melt (2g)
@@ -28,6 +30,8 @@ good grain after saw / knife kerfs.
 
 ## Process ##
 
+The grains were cast on 30 May 2015.
+
 We measured out the potassium nitrate and sorbitol into a sealable plastic
 container and shook vigorously to break up the clumps in the sorbitol and
 get a good physical mix.  
@@ -56,3 +60,14 @@ actually.
 
 About 4 hours later, the card stock was pulled off the test strand, which
 proved to still be a bit on the pliable and "tacky" surface side.
+
+## Observations ##
+
+After casting, further reading on Nakka's site indicates initial melt is
+at about 91C, or 196F.  Fully melted at 125C, or 257F.  Discoloration at
+175C, or 347F.
+
+Nakka says wait 24 hours before trying to pull the core rod.  The propellant 
+will remain pliable after cooling, thus can be deformed if handled sooner. 
+
+