X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.4c2o) with ESMTP id 4890680 for flyrotary@lancaironline.net; Fri, 04 Mar 2011 10:37:00 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=pepdxKapwHuwCZNFD5uob2wvham6E+RljB0uXw08FdQ= c=1 sm=0 a=9YJVZDBOGz4A:10 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=xq0PoDeUAAAA:8 a=glYVDZ00AAAA:8 a=D9fKAQCuUt0W8kMYNiAA:9 a=kEXniySyepAPNC9yhscA:7 a=2VPIgFmpHM835kbhm_RFB3SbsLEA:4 a=wPNLvfGTeEIA:10 a=SCMvDfCHUMQA:10 a=XCwpvLtFMdsA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=FDWaJZD3XH3qvgvpF0EA:9 a=6NeBsQQGvJy6TfgWFigA:7 a=1vg13uGzp2wpUmWY4Y4Y-ok6-m0A:4 a=MSl-tDqOz04A:10 a=EzXvWhQp4_cA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.167.5 Received: from [174.110.167.5] ([174.110.167.5:50805] helo=EdPC) by cdptpa-oedge03.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 54/DD-19545-8F6017D4; Fri, 04 Mar 2011 15:36:24 +0000 Message-ID: <45278798283E4CABA5DEC703D3CA46AA@EdPC> From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Knock sensor and indicator Date: Fri, 4 Mar 2011 10:36:12 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0034_01CBDA57.FB90C590" 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_0034_01CBDA57.FB90C590 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yes, I agree with Mark, if you are going to try the knock sensor route, = then something like this might work. This particular one is probably = "tuned" for piston engines - so the question I would ask them before = buying is whether it would work with a rotary engine. The engine sound = spectrum are likely to be quite different. Actually, the rotary engine noise might be simplier to handle in that = you don't have pistons, connecting rods and valves all banging and = tapping away - so the spectrum might be a bit less noisy. If so, the a = knock might be easier to identify in a rotary. Ed From: Mark Steitle=20 Sent: Friday, March 04, 2011 9:53 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Knock sensor and indicator Chris, MSD makes an aftermarket knock sensor. It shouldn't be too difficult to = hook it up to a "big red light" on the panel. = http://www.autopartswarehouse.com/details/QQUnivQQMSDQQKnock_Sensor_Modul= eQQM468964.html?apwcid=3DP1135867996W43b3f85c7ab9e&gan=3D1&apwid95ZKmWX Mark =20 On Fri, Mar 4, 2011 at 8:43 AM, Chris Barber = wrote: Since I have had an issue with detonation, I am contemplating adding a = knock sensor. What do y'all know about this addition. I do not believe = Tracy's EM has a provision for a reading, so, what might be a good route = to take. The brief research I have done shows different frequencies, = types etc. What would be correct for a rotary, both as to a sensor and = something to notify me in the cabin? Thanks. I am about to replace ALL = my apex seals and soft parts and hopefully finally lick this = issue....hopefully....did I mention = hopefully...determinably...persistent? (heck, I wasn't planning anything = else this weekend ) Chris ------=_NextPart_000_0034_01CBDA57.FB90C590 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Yes, I agree with Mark, if you are going to try = the knock=20 sensor route, then something like this might work.  This particular = one is=20 probably "tuned" for piston engines - so the question I would ask them = before=20 buying is whether it would work with a rotary engine.  The engine = sound=20 spectrum are likely to be quite different.
 
Actually, the rotary engine noise might be = simplier to=20 handle in that you don't have pistons, connecting rods and valves all = banging=20 and tapping away - so the spectrum might be a bit less noisy.  If = so, the a=20 knock might be easier to identify in a rotary.
 
Ed

Sent: Friday, March 04, 2011 9:53 AM
Subject: [FlyRotary] Re: Knock sensor and=20 indicator

Chris,
 
MSD makes an aftermarket knock sensor.  It shouldn't be = too=20 difficult to hook it up to a "big red light" on the panel.  http://www.autopartswarehouse.com/details/QQUnivQQMSDQQKn= ock_Sensor_ModuleQQM468964.html?apwcid=3DP1135867996W43b3f85c7ab9e&ga= n=3D1&apwid95ZKmWX
 
Mark


 
On Fri, Mar 4, 2011 at 8:43 AM, Chris Barber = <cbarber@texasattorney.net&g= t;=20 wrote:

Since I have had an issue with detonation, I = am contemplating=20 adding a knock sensor.  What do y'all know about this = addition.  I=20 do not believe Tracy's EM has = a=20 provision for a reading, so, what might be a good route to take.  = The=20 brief research I have done shows different frequencies, types=20 etc.   What would be correct for a rotary, both as to a = sensor and=20 something to notify me in the cabin?  Thanks.  I = am=20 about to replace ALL my apex seals and soft parts and hopefully = finally=20 lick this issue....hopefully....did I mention=20 hopefully...determinably...persistent? (heck, I wasn't = planning=20 anything else this weekend <g>)

 

Chris


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