X-Git-Url: https://git.gag.com/?p=web%2Fgag.com;a=blobdiff_plain;f=rockets%2Fairframes%2F2YikStik%2Findex.mdwn;h=76e3317bd7e5dffbe2f46ce4c8f04f27ff524ab5;hp=07f21c58101fbb51e60aff600ae48ecc89b9bc44;hb=4e2ab424f15d1798fd1b49d49f34ba6544b4810f;hpb=12921e4a3020fd7873c9df4dbcb4dfd0d28474fb

diff --git a/rockets/airframes/2YikStik/index.mdwn b/rockets/airframes/2YikStik/index.mdwn
index 07f21c5..76e3317 100644
--- a/rockets/airframes/2YikStik/index.mdwn
+++ b/rockets/airframes/2YikStik/index.mdwn
@@ -30,7 +30,7 @@ collect.
 ## Design Details
 
 * 98mm [Giant Leap](http://giantleaprocketry.com) Dynawind air frame
-* 75mm [PML](http://www.publimissiles.com) phenolic motor mount
+* 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 1/8 inch birch plywood laminated with carbon fiber 
   and a fibreglass sanding veil
@@ -38,17 +38,70 @@ collect.
   that hold the fins are double thickness (3/4 inch) and notched for perfect 
   fin alignment.
 
-The OpenRocket design file is 2YikStik-2TM.ork in Bdale's git repository.
+The OpenRocket design file is 
+[2YikStik.ork](/rockets/airframes/2YikStik/2YikStik.ork).
 
 ## Build
 
-Parts gathered during October 2010.
+Parts gathered during October 2010.  Built mostly during April and May 2011.
+
+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
+6 oz glass as a sanding veil, all vacuum bagged with West Systems laminating
+epoxy using a kitchen food saver appliance.
+
+The airframe tubing is Giant Leap Rocketry 98mm Magnaframe-based Dynawind,
+except for a short section behind the nose cone that uses the older phenolic
+based Dynawind because of the slightly larger inside diameter being a better
+fit for the glass nose cone shoulder.  
+
+The tailcone is a no-longer-available Giant Leap 98-75mm Slimline tailcone.
+
+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.
+
+Assembly techniques were "nothing special" except for the electronics...
+
+[Build Photos](http://gallery.gag.com/rockets/2yikstik/)
+
+### Thermistors ###
+
+The temperature sensors chosen are 0.8 mm diameter glass bead NTC thermistors
+made by EPCOS, model B57540G0303F000.  These were chosen because of their
+small size, and turn out to have a very fast response time to changing
+temperatures. 
+
+The leads were extended with 30 gauge wire wrap wire using twisted pairs of
+black plus a color.  The colored lead was insulated from the bead back over
+the solder joint using 1/16 inch heat shrink tubing.  The epoxy used for the
+nose cone and fin was tested and confirmed to have essentially no 
+conductivity.
+
+### Electronics ###
+
+The airframe geometry led us to decide to build two electronics bays, one in
+the airframe immediately aft of the nose cone, and the other in the fin can.  
+Each bay holds a production
+[TeleMetrum](http://altusmetrum.org/TeleMetrum), a prototype companion 
+board called [TeleScience](http://altusmetrum.org/TeleScience), a 900 mAh
+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.
 
 ## Publicity
 
 ## Flights
 
-The objective is to fly 2YikStik at NCR's Mile High Mayhem 2011 on a 
-[Cesaroni](http://pro38.com) Pro75 6xl Green3 reload.  If that goes well, 
-we hope to be able to fly a Pro75 6xl Imax load at LDRS 30, perhaps as a
-research load..  Stay tuned!
+The original objective of flying 2YikStik at NCR's Mile High Mayhem 2011 
+was not met due to weather conditions unfavorable for a high altitude launch.
+
+While it's possible we might be able to attend another NCR launch this summer,
+at this point we likely won't fly 2YikStik until LDRS 30.