From: Bdale Garbee Date: Tue, 17 Nov 2020 18:07:37 +0000 (-0700) Subject: add text to accompany photos X-Git-Url: https://git.gag.com/?p=web%2Faltusmetrum;a=commitdiff_plain;h=deb751a72972f658b3ad066a2e32016614693754 add text to accompany photos --- diff --git a/EasyMotor/index.mdwn b/EasyMotor/index.mdwn index a6a2eaa..87c8f62 100644 --- a/EasyMotor/index.mdwn +++ b/EasyMotor/index.mdwn @@ -19,15 +19,41 @@ memory chip, the contents of which can be downloaded after flight over USB. ## Example Installations ## -These photos are from snap-ring case forward closures machined by Bdale for +There are lots of ways to mount an EasyMotor board, but since we've been +asked, here are a few photos are from snap-ring case forward closures +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. +sensor screwed in. The first example is a 98mm snap-ring clossure, with the +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 +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: + +This second example is on a 75mm snap-ring closure, and was Bdale's first attempt +using 16-gauge steel to bend a mounting bracket that could also be used for recovery +harness attachment. Another A23 and holder are taped on the other side of the +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 +it obvious takes up a few extra inches of airframe length. Note 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. + ## Artifacts ##