update docs

[web/altusmetrum] / EasyMotor / index.mdwn

diff --git a/EasyMotor/index.mdwn b/EasyMotor/index.mdwn
index 0a6746b6233b318e53e6409ba4349562f3b89b29..aedcfa3f29ab97cf78ea8cdcd41463174df46f81 100644 (file)
--- a/EasyMotor/index.mdwn
+++ b/EasyMotor/index.mdwn
@@ -28,13 +28,15 @@ way through the closure, then drill and tap 1/8 NPT female threads part way
 through the closure thickness.  The hole gets filled with grease and the 
 sensor screwed in.  
 
 through the closure thickness.  The hole gets filled with grease and the 
 sensor screwed in.  
 

-The first example is a 98mm snap-ring clossure, with the 
+The first example is a 98mm snap-ring closure, with the 

 sensor and electronics mounted off-center so a 3/8" all-thread could be used
 sensor and electronics mounted off-center so a 3/8" all-thread could be used

-in the center for motor retention in a minimum-diameter-ish airframe.  The
-mounting bracket for the electronics was bent from a bit of 1/16" aluminum 
-sheet and screwed to the forward closure with two short 4-40 screws into
-tapped and drilled mounting holes.  Note the use of an A23 12v alkaline battery 
-in a holder on the bracket wiht the 
+in the center for motor retention in a minimum-diameter-ish airframe.  This
+motor had a small gap between the last propellant grain and the forward
+closure, so having the pressure sampling port off-center wasn't a 
+problem.  The mounting bracket for the electronics was bent from a bit of
+1/16" aluminum sheet and screwed to the forward closure with two short 4-40 
+screws into tapped and drilled mounting holes.  Note the use of an A23 12v
+alkaline battery in a holder on the bracket with the 

 EasyMotor prototype.  These batteries are fine for a flight or two, and both
 they and the little holders for them are cheap on Amazon and make installations
 like this fairly easy to put together:
 EasyMotor prototype.  These batteries are fine for a flight or two, and both
 they and the little holders for them are cheap on Amazon and make installations
 like this fairly easy to put together:


@@ -51,7 +53,7 @@ sensor not visible in this photo:
 This example is a refinement of the 16-gauge steel strap used to form a mounting 
 bracket and harness retention point, this time for a 54mm snap-ring closure.  
 Bdale has flown this setup several times now, and the only down-side is that
 This example is a refinement of the 16-gauge steel strap used to form a mounting 
 bracket and harness retention point, this time for a 54mm snap-ring closure.  
 Bdale has flown this setup several times now, and the only down-side is that

-it obvious takes up a few extra inches of airframe length.  Note the quik-link
+it obvious takes up a few extra inches of airframe length.  Note also the quik-link

 wrapped in electrical tape to make sure it doesn't flop down and short against
 any of the electronics in flight.  Note also a long piece of shooter wire that
 gets fed through a vent hole in the airframe as a twist-n-tape power switch.
 wrapped in electrical tape to make sure it doesn't flop down and short against
 any of the electronics in flight.  Note also a long piece of shooter wire that
 gets fed through a vent hole in the airframe as a twist-n-tape power switch.


@@ -70,6 +72,6 @@ The hardware design files are available from
 
 ## Availability ##
 
 
 ## Availability ##
 

-Prototypes of v2 were built and successfully flown.  An initial production 
-batch is now underway, and we hope these will be for sale around the end of
-calendar year 2020.
+Prototypes of v2 were built and successfully flown.  The initial production
+run is back from our surface-mount assembler, and testing is underway.  We
+hope to have these available for sale by February 2021.