From 2a015179c8c68852e5d95da522b8adc26e2c18d1 Mon Sep 17 00:00:00 2001 From: Bdale Garbee Date: Sun, 28 Jun 2015 22:18:29 -0600 Subject: [PATCH] more text --- rockets/research/test5.mdwn | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/rockets/research/test5.mdwn b/rockets/research/test5.mdwn index 23f80a1..4f2a59c 100755 --- a/rockets/research/test5.mdwn +++ b/rockets/research/test5.mdwn @@ -2,12 +2,12 @@ Trying again using KNSO with our new casting bases. We also have a real eye-dropper now for measuring the surfactant. 4 38mm grains of -1.875" length, using formula of +1.875" length, 250 gram batch using formula of * 65% KNO3 * 35% Sorbitol * 1% red iron oxide -* 3 drops Polystep-B1 +* 3 drops Polystep-B1 (1 drop per 100g being the general idea) ## Process ## @@ -81,7 +81,9 @@ point. ## Observations ## -Pour went really smoothly. One grain looked "perfect" with the propellant +Pour went really smoothly. Easier than previous batches, perhaps due to +a bit more surfactant, perhaps just getting better, perhaps due to putting +the mandrels in post-pour. One grain looked "perfect" with the propellant settled evenly and a couple mm of open gap at the top of the casting tube. We think this one may have been slightly under-filled compared to the others, all of which had some evidence of propellant sticking to the -- 2.30.2