X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5500745 for flyrotary@lancaironline.net; Sun, 22 Apr 2012 08:52:29 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=2.0 cv=bLSU0YCZ c=1 sm=0 a=g3L/TDsr+eNLfIieSKfGkw==:17 a=AHkS0RJitIMA:10 a=5knfmSJSezAA:10 a=05ChyHeVI94A:10 a=arxwEM4EAAAA:8 a=r1ClD_H3AAAA:8 a=rL-zH3S2dCz_uhY2mXIA:9 a=GaAIJX0sF_s80eUTdqgA:7 a=wPNLvfGTeEIA:10 a=AAvYLDLOAAAA:8 a=Ia-xEzejAAAA:8 a=_mUaJRwZQphbJ-aXcm8A:9 a=Fx9EzgZj7YouHpz13fAA:7 a=_W_S_7VecoQA:10 a=frz4AuCg-hUA:10 a=s2loLT2QvaoA:10 a=EzXvWhQp4_cA:10 a=g3L/TDsr+eNLfIieSKfGkw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.170.10 Received: from [174.110.170.10] ([174.110.170.10:61111] helo=EdPC) by cdptpa-oedge03.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id BA/B0-29249-5EEF39F4; Sun, 22 Apr 2012 12:51:53 +0000 Message-ID: <26BF85CAB384499E8CE435699E279795@EdPC> From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Firewall Penetrations Date: Sun, 22 Apr 2012 08:51:47 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0A52_01CD2065.26826D40" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 This is a multi-part message in MIME format. ------=_NextPart_000_0A52_01CD2065.26826D40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable William, I would suggest keeping any lines with pulses on them (such as fuel = injectors) separate from other electrical lines. The 12Volt swing is = not the concern, but we have found that collapsing injector magnetic = fields can generate much higher voltage peaks (thanks Steve B) which = could induce noise in other lines. Some lines such as your EGT will = have very low voltage/current signal that could get affected by such = noise spikes. Not sure you have to pass your ground through the firewall. My engine = ground is grounded to the firewall with a bolt/washer and on the cockpit = side I have tabs off the same bolt for grounds. I think you have the basics covered - the devil is in the details If you plan on using a thermostat then H20 would probably be my choice. = Without it, the coolant temps is too low in the winter to provide much = heating effect (don't ask me how I know {:>). Without thermostat, I = would opt for muff (especially in cold weather country). =20 Good Luck I fly an Ec2 in an Rv-6A Ed Edward L. Anderson Anderson Electronic Enterprises LLC 305 Reefton Road Weddington, NC 28104 http://www.andersonee.com http://www.eicommander.com From: William Mason=20 Sent: Saturday, April 21, 2012 11:33 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Firewall Penetrations I just got my mount and gear legs back from the powder-coater and before = I mount them to the fuse for good, I'd like to work out the firewall = penetrations. I think at this point I'll be using a single throttle = body, short intake runners into a log manifold and a single = turbocharger. I already have an ec-2 (thinking about popping for an ec-3) I'm running = a Tech Welding bed-style mount. Penetrations that I still need that I can think of: Throttle Engine harness (I think that EGT will be okay to go with the rest of the = wires but I'm not sure, I've got some reading to do) Fuel feed Fuel return Power Ground MAP Heat (not sure if I'll go with H20 or Muff) Who has an rv-7 or rv-9 and has worked out the proper locations for = these penetrations? Am I missing some? Do you have a similar airframe? I'll take your experience too. ------=_NextPart_000_0A52_01CD2065.26826D40 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
William,
 
I would suggest keeping any lines with = pulses on=20 them (such as fuel injectors) separate from other electrical=20 lines.  The 12Volt swing is not the concern, but we have found = that=20 collapsing injector magnetic fields can generate much higher voltage = peaks=20 (thanks Steve B) which could induce noise in other lines.  Some = lines such=20 as your EGT will have very low voltage/current signal that could get = affected by=20 such noise spikes.
 
 Not sure you have to pass your = ground through=20 the firewall.  My engine ground is grounded to the firewall with a=20 bolt/washer and on the cockpit side I have tabs off the same bolt for=20 grounds.
 
I think you have the basics covered - = the devil is=20 in the details
 
If you plan on using a thermostat then = H20 would=20 probably be my choice.  Without it, the coolant temps is too low in = the=20 winter to provide much heating effect (don't ask me how I know = {:>). =20 Without thermostat, I would opt for muff (especially in cold weather=20 country). 
 
Good Luck
 
I fly an Ec2 in an Rv-6A
 
Ed
 
Edward L. Anderson
Anderson = Electronic=20 Enterprises LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com

From: William Mason
Sent: Saturday, April 21, 2012 11:33 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Firewall Penetrations

I just got my mount and gear legs back from the = powder-coater and=20 before I mount them to the fuse for good, I'd like to work out the = firewall=20 penetrations.  I think at this point I'll be using a single = throttle body,=20 short intake runners into a log manifold and a single = turbocharger.


I=20 already have an ec-2 (thinking about popping for an ec-3)  I'm = running a=20  Tech Welding bed-style mount.


Penetrations that I still = need=20 that I can think of:


Throttle
Engine harness (I think that = EGT=20 will be okay to go with the rest of the wires but I'm not sure, I've got = some=20 reading to do)
Fuel feed
Fuel = return
Power
Ground
MAP
Heat=20 (not sure if I'll go with H20 or Muff)


Who has an rv-7 or = rv-9 and=20 has worked out the proper locations for these = penetrations?


Am I=20 missing some?


Do you have a similar airframe?  I'll take = your=20 experience too.






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