X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm25-vm2.bullet.mail.gq1.yahoo.com ([98.136.217.113] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTPS id 6002639 for flyrotary@lancaironline.net; Wed, 09 Jan 2013 09:38:33 -0500 Received-SPF: none receiver=logan.com; client-ip=98.136.217.113; envelope-from=echristley@att.net Received: from [98.137.12.191] by nm25.bullet.mail.gq1.yahoo.com with NNFMP; 09 Jan 2013 14:37:59 -0000 Received: from [208.71.42.192] by tm12.bullet.mail.gq1.yahoo.com with NNFMP; 09 Jan 2013 14:37:59 -0000 Received: from [127.0.0.1] by smtp203.mail.gq1.yahoo.com with NNFMP; 09 Jan 2013 14:37:59 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=att.net; s=s1024; t=1357742279; bh=5nTS2Jp6EMrr8nbcCGgvuLkIsXtVTwgv9ETkNL4ecJ0=; h=X-Yahoo-Newman-Id:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer; b=EGgxbNf2ZXnaUcBmOmKX0UkIIxSN0F1yKfEsmA/ycmPu2yly5fheal0eiXWNKU6gQjEWrWNT4JIFZrcFN9RLjsvDbL9TBMloLiX92XCcvIHmIP0bYc97NKyULfsmfBYMZiamKR0FdiHWbI2Wqx3N+dp70uHHq7BEdrGnjzDo2Gc= X-Yahoo-Newman-Id: 521010.40252.bm@smtp203.mail.gq1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: pbtjPXMVM1k_LICE7aHzqQCeIwSL8Xjr5Djs5jfL1BsV4YH yzm16myCxp3ze0afjqXzcwp2a_bjJVyGPMQg2d4.X1yfzPvFLMp82QjSKZen RykZpMVzTd1VBJceSiAjbKuRj_dtSLv4ZySH18qid9SmzprVZgBT.zrrht0a vimC8AyIeJL9L73Zy2pzKumdQPy_kzbqM0Zyn6JE3BknFspHzxCUnr.FBj4S zAa1hSzB5FANU3chMgLnmFHu5FA_fPcS7d7HUSFcJHd7CDZOD_5NWZ_pUixK 1bD04mbmRH2N5m40aGJ5MnVwighxLfZEaCcRsJoQaUIYDYrJZwQE7fCPsJIU 1t.vNl.QhaHPOKd3oU2e3pQTJLmW.jj9quKbuc1Snb8_ZwGbB19FK30hinAS VXV0ii3WUTBPueOEOxSbdwZ57QzFeMaUt1l0ZM7h9pDOX X-Yahoo-SMTP: 40RP3pGswBDvPav1a.I8eMv.KS8bdgWBnCloVoKaow-- Received: from [10.63.221.139] (echristley@216.240.30.5 with plain) by smtp203.mail.gq1.yahoo.com with SMTP; 09 Jan 2013 06:37:59 -0800 PST From: Ernest Christley Mime-Version: 1.0 (Apple Message framework v1283) Content-Type: multipart/alternative; boundary="Apple-Mail=_B2DE42B9-36A8-4051-BB7D-CB6827339BD1" Subject: Re: [FlyRotary] Re: Aeroquip hose changed to hiccup Date: Wed, 9 Jan 2013 09:38:01 -0500 In-Reply-To: To: "Rotary motors in aircraft" References: Message-Id: X-Mailer: Apple Mail (2.1283) --Apple-Mail=_B2DE42B9-36A8-4051-BB7D-CB6827339BD1 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 A problem that mimics a poorly wired VR sensor, but=20 -only happens occasionally,=20 -with various levels of "response" -and is getting worse. Bill, if you haven't done so already, I would suggest changing the = wiring to the VR sensor completely. It sounds to me like a textbook = example of the worst sort of electronic malfunction you can have=85an = intermittent open. You'll never find it under normal test conditions, = and it will manifest at the most inopportune times. The only way to = completely rule it out as a failure scenario is to completely replace = the circuit path. On Jan 8, 2013, at 11:42 PM, Bill Bradburry wrote: > No, I have the 2.85 gearbox. I have the MT electric prop, so I fly = WOT and use the prop to govern the engine speed.=20 > I have changed the plugs with no effect. The mixture is fine when = this is happening. Fuel pressure also. I had an incident once on take = off like you describe where the plane was backfiring like crazy just = after I lifted off. I had the mixture too rich. I dialed it back and = everything smoothed out. This is different. It doesn=92t really = backfire. It is a thump and it jerks the engine and plane. You can = hear and feel it. It seems to be a single thump and it has varying = degrees of violence. Some are just a little miss and some are so bad it = shakes everything. These are less frequent, but they are bad enough = that I don=92t think they are good for the PSRU, prop, or engine mount. > That is why I have been bugging Tracy about the change for the EC-2. = I have my fingers crossed that this will fix it. :>) > =20 > Bill B > =20 --Apple-Mail=_B2DE42B9-36A8-4051-BB7D-CB6827339BD1 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252
-and is getting = worse.

Bill, if you haven't done so already, I = would suggest changing the wiring to the VR sensor completely.  It = sounds to me like a textbook example of the worst sort of electronic = malfunction you can have=85an intermittent open.  You'll never find = it under normal test conditions, and it will manifest at the most = inopportune times.  The only way to completely rule it out as a = failure scenario is to completely replace the circuit = path.



On Jan 8, 2013, = at 11:42 PM, Bill Bradburry wrote:

=

No, I have the 2.85 gearbox.  = I have the MT electric prop, so I fly WOT and use the prop to govern the engine speed. 

I have changed the plugs with no = effect.  The mixture is fine when this is happening.  Fuel pressure = also.  I had an incident once on take off like you describe where the plane was = backfiring like crazy just after I lifted off.  I had the mixture too = rich.  I dialed it back and everything smoothed out.  This is different.  It = doesn=92t really backfire.  It is a thump and it jerks the engine and = plane.  You can hear and feel it.  It seems to be a single thump and it has = varying degrees of violence.  Some are just a little miss and some are so = bad it shakes everything.  These are less frequent, but they are bad = enough that I don=92t think they are good for the PSRU, prop, or engine = mount.

That is why I have been bugging = Tracy = about the change for the EC-2.  I have my fingers crossed that this will fix = it.  :>)

 

Bill = B

 

=
= --Apple-Mail=_B2DE42B9-36A8-4051-BB7D-CB6827339BD1--