-machined by Bdale for
-test flights of EasyMotor. The sensor bodies are 316 stainless with a 1/8 NPT
-male boss, so the approach chosen is to drill a 1/8 inch touch hole all the
-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.
-
-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
+machined by Bdale for test flights of EasyMotor. For launch detection to
+work, the board must be mounted so the board's long axis is aligned with the
+axis of flight, and by default the "beeper end" must be towards the nose.
+Note that these examples all feature earlier versions of EasyMotor that used
+a different power supply and battery strategy. Don't be confused by that! The
+production version of EasyMotor uses our standard Altus Metrum LiPo batteries.
+
+The body of the pressure sensors used are 316 stainless with a 1/8 NPT
+male boss, so Bdale's usual approach is to drill a 1/8 inch "touch hole" or
+sampling port all the way through the forward closure, then drill and tap
+1/8 NPT female threads part way through the closure thickness. The hole
+gets filled with grease, and then the sensor screwed in. Since Bdale usually
+builds airframes that assume the recovery harness can attach to the motor
+case, several prototype installations depended on the stainless steel sensor
+body to act as a bolt to attach a bracket that supported both circuit board
+mounting and recovery harness attachment.
+
+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