update

[web/gag.com] / rockets / airframes / YikStik3 / index.mdwn

diff --git a/rockets/airframes/YikStik3/index.mdwn b/rockets/airframes/YikStik3/index.mdwn
index a0b565a24fe1f39b573f9dfe21291d038255b7c3..4d696e487a26dba4cd1381e3833e2ddb3a7d6cc8 100644 (file)
--- a/rockets/airframes/YikStik3/index.mdwn
+++ b/rockets/airframes/YikStik3/index.mdwn
@@ -13,8 +13,8 @@ Robert is very interested in measuring the temperature of a nose
 cone and a fin on a rocket at speeds above Mach.  This led Bdale to design
 a [TeleMetrum](http://altusmetrum.org/TeleMetrum) companion board called
 [TeleScience](http://altusmetrum.org/TeleScience) capable of hosting up to
-12 NTC thermistors for temperature data collection.  
-As was the case with 2YikStik](../2YikStik), the plan is to fly two
+12 NTC thermistors for temperature data collection.  As was the case with 
+[2YikStik](../2YikStik), the plan is to fly two
 [TeleMetrum](http://altusmetrum.org/TeleMetrum)+[TeleScience](http://altusmetrum.org/TeleScience) 
 setups, one mounted in the nose cone and one mounted in the fin can.  The 
 one in the fin can will be responsible for apogee deployment, and the one in 
@@ -26,7 +26,8 @@ embedded in the glass layers made for us by Jeff Lane of
 
 ## Design Details
 
-* 98mm [Performance Rocketry](http://performancerocketry.com) G-10 convolute glass air frame
+* 98mm [Performance Rocketry](http://performancerocketry.com) G-10 convolute glass air frame 
+* 98mm [Performance Rocketry](http://performancerocketry.com) G-12 filament-wound glass couplers 
 * 75mm [PML](http://www.publicmissiles.com) phenolic motor mount
 * [Shock Wave Rocketry](http://shockwaverocketry.com/) fiberglass 98mm Von Karman 6:1 nose cone
 * custom fins, using 3/16 inch birch plywood laminated with carbon fiber 
@@ -63,7 +64,8 @@ LiPo battery, and a power switch.
 The TeleScience board supports connection of up to 12 NTC thermistors along
 with other capabilities.  
 
-Installing the electronics in the fin can bay was .. interesting.  More later.
+Installing the electronics in the fin can bay is a *huge* challenge due to the
+restricted space between the MMT and airframe.
 
 ## Build
 
@@ -74,15 +76,16 @@ The nose cone was custom fabricated by Jeff Lane at
 [Shockwave Rocketry](http://shockwaverocketry.com), with thermistors embedded.
 
 The fins are 3/16 inch birch ply, tapered on the leading and trailing edges,
-then covered with one layer of 5.7 oz 2x2 twill carbon fiber and a layer of
+then covered with two layers of 5.7 oz 2x2 twill carbon fiber and a layer of
 6 oz glass as a sanding veil, all vacuum bagged with West Systems laminating
-epoxy using a kitchen food saver appliance.
+epoxy using a kitchen food saver appliance.  The two CF layers are rotated
+45 degrees from each other.
 
 We're moving from the Giant Leap Rocketry 98mm Magnaframe-based Dynawind to
 G-10 glass tubing this time around.  Dynawind is lighter and strong enough,
 but we want to use glass couplers this time around for more strength, and 
 that leads to fit issues with the Magnaframe-based Dynawind tubing.  So even
-though it's slightly heavier, we're going with an all-gladd build this time.
+though it's slightly heavier, we're going with an all-glass build this time.
 We'll lose a little bit of max velocity, but hopefully it'll all hang together
 this time!
 
@@ -91,8 +94,7 @@ recovered from 2YikStik's wreckage.
 
 All rings and bulkheads were cut using a CNC milling machine from 3/8 inch
 birch plywood.  The fin forward and leading edge rings are made from 3/4 inch
-thick assemblies made by laminating two such rings with wood glue, to provide
-sufficient depth for milled fin slots.
+thick birch plywood, mostly to provide sufficient depth for milled fin slots.
 
 Will add a pointer to build photos here once they are available.