X-Git-Url: https://git.gag.com/?p=web%2Fgag.com;a=blobdiff_plain;f=rockets%2Fairframes%2FMehGaNuke%2Findex.mdwn;h=84131923537f9b5906fcce5a1bcf84e61b9e8020;hp=d79cb381879a73c2c7351cfd51dbb1d46c6fa07d;hb=d64500481ff811dd3dc3f4cd218136b76faf8671;hpb=b60145e545f2b6b36d7a88591a3f961adf14ccfc

diff --git a/rockets/airframes/MehGaNuke/index.mdwn b/rockets/airframes/MehGaNuke/index.mdwn
index d79cb38..8413192 100644
--- a/rockets/airframes/MehGaNuke/index.mdwn
+++ b/rockets/airframes/MehGaNuke/index.mdwn
@@ -110,9 +110,39 @@ The airframe is configured with two 1515-sized rail buttons, and is really
 only considered safe to launch from Terry Lee's launch trailer with 20 feet
 of very stiff 1515 rail.
 
+### Revisions for Version 2 ###
+
+Because the main airframe zippered somewhat on the first flight, and the
+ARRD released at apogee, rather than just repairing the existing airframe
+tube, we're going to build a replacement.
+
+To increase stability, the main airframe tube length will be extended from
+the original 4.5 feet to approximately 8 feet.  The expected increase 
+in stability should allow a reduction in nose weight, increasing 
+safety.  It should also make recovery system loading less arduous on the 
+rail.  Of
+course, this means the rocket will be closer to the length of an upscaled 
+Nuke Pro Maxx rather than the original Lil Nuke.
+
+For main deployment, the ARRD is being replaced with a 
+[Tender Descender L3](https://tinderrocketry.com/l13-tender-descender-tether),
+which has the advantage that the release mechanism is orthogonal to the 
+axis of flight.  That seems important when the airframe is this heavy and
+apogee occurs at a non-nominal velocity, as in the first flight.
+
+The original build had internal 1x2 ribs and a baffle yielding a "D" shaped 
+main bay with the apogee charge gasses going up the channel without pushing
+on the main deployment bag.  For this rebuild, 3 ribs will run the airframe
+length between the 12" airframe and a concentric full-length 8" deployment
+bay, with centering rings on each end.  One sector of the rings will be
+vented to allow apogee ejection gasses to flow from the charge cups on the
+leading edge of the fin can to push the nose off without push up on the 
+main in its deployment bag.
+
 ## Design / Simulation File
 
-[mehganuke.ork](/rockets/airframes/MehGaNuke/mehganuke.ork)
+Original [mehganuke.ork](/rockets/airframes/MehGaNuke/mehganuke.ork)
+Revised [mehganuke-v2.ork](/rockets/airframes/MehGaNuke/mehganuke-v2.ork)
 
 ## Construction Log
 
@@ -183,16 +213,15 @@ deployment bag was not recovered.  After studying the zipper and thinking
 about the main deployment sequence, several changes will be made before the
 next flight:
 
-	- The main airframe tube will be replaced with a tube that's a bit
-	  longer (for greater stability), and has an internal 7.5-8" diameter
-	  tube instead of the flat baffle to ease main chute deployment.
+ - The main airframe tube will be replaced with a tube that's a bit longer 
+   (for greater stability), and has an internal 7.5-8" diameter tube instead 
+   of the flat baffle to ease main chute deployment.
 
-	- Switch from the ARRD to the largest [Tender Descender](http://www.tinderrocketry.com/l13-tender-descender-tether) for main deployment
+ - Switch from the ARRD to the largest [Tender Descender](http://www.tinderrocketry.com/l13-tender-descender-tether) for main deployment.
 
-	- Add a TeleGPS to the nose assembly so it can be tracked 
-	  independently, and let it come down under the 2 existing 5-foot
-	  chutes.  Add a third 5-foot chute to be a dedicated pilot for the
-	  28-foot main chute.
+ - Add a TeleGPS to the nose assembly so it can be tracked independently, and let 
+   it come down by itself under the 2 existing 5-foot chutes.  Add a third 5-foot 
+   chute to be a dedicated pilot for the 28-foot main chute.
 
 These changes should reduce the chance of another zipper, and reduce the amount
 of strap we need to stuff into the bay.