Return-Path: Received: from web81007.mail.yahoo.com ([206.190.37.152] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with SMTP id 754948 for flyrotary@lancaironline.net; Tue, 22 Feb 2005 17:12:23 -0500 Received-SPF: none receiver=logan.com; client-ip=206.190.37.152; envelope-from=deltaflyer@prodigy.net Message-ID: <20050222221137.78075.qmail@web81007.mail.yahoo.com> Received: from [199.231.49.128] by web81007.mail.yahoo.com via HTTP; Tue, 22 Feb 2005 14:11:37 PST Date: Tue, 22 Feb 2005 14:11:37 -0800 (PST) From: James Maher Subject: Re: [FlyRotary] Using "conventional" aircraft ignition switches.. To: Rotary motors in aircraft In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1775819125-1109110297=:78048" --0-1775819125-1109110297=:78048 Content-Type: text/plain; charset=us-ascii Dave, I use this switch with Tracy's EC-2 controller. The coil disable inputs are wired to this switch and function when controller "B" is selected. I also have 2 separate 20A breakers ( the push/pull type) that the coils and injector pairs get their power from so that they can be disabled when working on the engine. Jim Maher David Staten wrote: Another "fishing trip" to ping the collective masses here. A little background: Typical "aircraft" key ignition switches for controlling magnetos operate by grounding out the mag to "disable" it. The commonly seen configuation is something that has OFF, L, R, BOTH and a START position.. On the L setting for Left Magneto, the right mag is actually grounded/disabled and vice versa for the R position. In addition, in some installations, the switch also disables the right mag for starting if the aircraft has a "retarded" mag on the left side. I am curious about the following switch: http://www.aircraftspruce.com/catalog/elpages/ignitionswitchkit.php http://www.aircraftspruce.com/catalog/elpages/ignitionswitchkit.php Wiring diagrams available at the link. I am wondering if anyone has hands on experience with these sorts of switches (from a wiring standpoint.. Does anyone know if this switch is reasonably/easily adaptable to selecting individual coil banks such as for "trailing" and "leading" when used in conjunction with an EC 2 setup? Is the ground terminal on this switch connected to the entire switch chassis or is it an isolated terminal ONLY used for grounding the mags (and if its isolated, could it safely be used as a low current "HOT" instead to power a coil relay? Or are there relays (which in turn control the coil packs) that can be reasonably set to open/disconnect when placed to ground? Or would having a relay with a ground trigger result in undesireable current flow through the switch or relay? I assume an Ignition Master switch to de-energize the whole thing would be needed in that case If useable, the implications would be great: A key switch for "security appearance" (A.K.A.. the New Jersey dual lock rule). Key-cycled control of both coils, AND a start switch all in one. The only DISADVANTAGE that I see is the difficulty in cranking the engine with the ignition OFF for whatever reason: preoiling, clearing a flood, priming etc. I would assume that the COILS circuit breaker would need to be pulled in that event. Dave --0-1775819125-1109110297=:78048 Content-Type: text/html; charset=us-ascii

Dave,

I use this switch with Tracy's EC-2 controller.

The coil disable inputs are wired to this switch and function when controller "B" is selected.

I also have 2 separate 20A breakers ( the push/pull type) that the coils and injector pairs get their power from so that they can be disabled when working on the engine.

Jim Maher

David Staten <Dastaten@earthlink.net> wrote:

Another "fishing trip" to ping the collective masses here.

A little background:
Typical "aircraft" key ignition switches for controlling magnetos operate by grounding out the mag to "disable" it. The commonly seen configuation is something that has OFF, L, R, BOTH and a START position.. On the L setting for Left Magneto, the right mag is actually grounded/disabled and vice versa for the R position. In addition, in some installations, the switch also disables the right mag for starting if the aircraft has a "retarded" mag on the left side.

I am curious about the following switch:
http://www.aircraftspruce.com/catalog/elpages/ignitionswitchkit.php
http://www.aircraftspruce.com/catalog/elpages/ignitionswitchkit.php

Wiring diagrams available at the link.

I am wondering if anyone has hands on experience with these sorts of switches (from a wiring standpoint..

Does anyone know if this switch is reasonably/easily adaptable to selecting individual coil banks such as for "trailing" and "leading" when used in conjunction with an EC 2 setup?

Is the ground terminal on this switch connected to the entire switch chassis or is it an isolated terminal ONLY used for grounding the mags (and if its isolated, could it safely be used as a low current "HOT" instead to power a coil relay? Or are there relays (which in turn control the coil packs) that can be reasonably set to open/disconnect when placed to ground? Or would having a relay with a ground trigger result in undesireable current flow through the switch or relay? I assume an Ignition Master switch to de-energize the whole thing would be needed in that case

If useable, the implications would be great: A key switch for "security appearance" (A.K.A.. the New Jersey dual lock rule). Key-cycled control of both coils, AND a start switch all in one.

The only DISADVANTAGE that I see is the difficulty in cranking the engine with the ignition OFF for whatever reason: preoiling, clearing a flood, priming etc. I would assume that the COILS circuit breaker would need to be pulled in that event.

Dave

--0-1775819125-1109110297=:78048--