X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm35-vm2.bullet.mail.gq1.yahoo.com ([98.136.216.173] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTPS id 6003116 for flyrotary@lancaironline.net; Wed, 09 Jan 2013 12:48:48 -0500 Received-SPF: none receiver=logan.com; client-ip=98.136.216.173; envelope-from=echristley@att.net Received: from [98.137.12.191] by nm35.bullet.mail.gq1.yahoo.com with NNFMP; 09 Jan 2013 17:48:14 -0000 Received: from [98.136.185.42] by tm12.bullet.mail.gq1.yahoo.com with NNFMP; 09 Jan 2013 17:48:14 -0000 Received: from [127.0.0.1] by smtp103.mail.gq1.yahoo.com with NNFMP; 09 Jan 2013 17:48:14 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=att.net; s=s1024; t=1357753694; bh=EoBVRzHzJnaxC0eAWqDSA4U0Vsj/1NfJj70exct61mw=; 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=MHilWzA7tQLvmeGxmQGKKg9bRbAcdKbrItBtmVGSSawemfTxSSS6a+8CBJPNVcaPlLuq+wyVu2Chn+jvlSEQAbyzmFAUfNmfFtxkV0lqI9I8vu3ykDolcX0FXaIWvJ5rdYwMBlTA2ruWnkAtyrSVJpKkFjcbyYm8l7oLuMHrwGk= X-Yahoo-Newman-Id: 351850.92971.bm@smtp103.mail.gq1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: _fu7.r8VM1kQKzQAMOP59UQwQeaJV4CQPs53eDd6UzNMmzL 81Bwt4achM0fHLQJKP7wSPVJHSAbF1FQB3kJjvw8kF0C5soOy15mMORrku_2 RrmIh9FTkayyUlx4FcXfKJtq3i9tms2Ss.N9GLo2OvAMvZC7s46.wnhdK3Of GySh2mBxvARYtQIM5KRKbfW8uXljzkh5btP45F4A3yLGunNJNB_xv9AzIlNI Is0vyJn2HQN4ILam8IGgxtR3dzplEf8VyKDjqBzI2xw4VqrisaL3kfIEgeaQ GIwpzwDQy28zJojdP1xYbYp6YaXpmuBouNomKccrAfyu7oC4smABJBN98V8G BS4BwaPy7G8mteVJMrs5D8u4tFeFjyre8B6ZXwpNlcU0_dvzN_9sHtBrFX5r 4coIiVYBqE9yxema8pC_v5QHboWRUMOgS2qQWAbpSQhtZ32rp262BNWAInRg 1dOmmLD299m_OBIMGTnhX X-Yahoo-SMTP: 40RP3pGswBDvPav1a.I8eMv.KS8bdgWBnCloVoKaow-- Received: from [10.63.221.139] (echristley@216.240.30.5 with plain) by smtp103.mail.gq1.yahoo.com with SMTP; 09 Jan 2013 09:48:14 -0800 PST From: Ernest Christley Mime-Version: 1.0 (Apple Message framework v1283) Content-Type: multipart/alternative; boundary="Apple-Mail=_6782B4C4-4259-40F9-A334-F4A0A8C06041" Subject: Re: [FlyRotary] Aeroquip hose changed to hiccup Date: Wed, 9 Jan 2013 12:48:15 -0500 In-Reply-To: To: "Rotary motors in aircraft" References: Message-Id: <1B512BD5-4101-426E-94C2-734A0806639C@att.net> X-Mailer: Apple Mail (2.1283) --Apple-Mail=_6782B4C4-4259-40F9-A334-F4A0A8C06041 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 The timing sensor thingy. "Variable Reluctance" sensor. On Jan 9, 2013, at 12:20 PM, Bill Bradburry wrote: > I am currently at a loss as to what a =93VR sensor=94 would be?? > =20 > B2 > =20 > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Ernest Christley > Sent: Wednesday, January 09, 2013 9:38 AM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: Aeroquip hose changed to hiccup > =20 > A problem that mimics a poorly wired VR sensor, but=20 > -only happens occasionally,=20 > -with various levels of "response" > -and is getting worse. > =20 > 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. > =20 > =20 > =20 > On Jan 8, 2013, at 11:42 PM, Bill Bradburry wrote: >=20 >=20 > 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=_6782B4C4-4259-40F9-A334-F4A0A8C06041 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252


On Jan 9, 2013, at 12:20 PM, = Bill Bradburry wrote:

=

I am currently at a loss as to what = a =93VR sensor=94 would be??

 

B2

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ernest Christley
Sent: Wednesday, January = 09, 2013 9:38 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Aeroquip hose changed to hiccup

 

A problem that mimics a poorly wired VR sensor, = but 

-only happens occasionally, 

-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. 

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=_6782B4C4-4259-40F9-A334-F4A0A8C06041--