X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTP id 5746589 for flyrotary@lancaironline.net; Wed, 05 Sep 2012 23:28:08 -0400 Received-SPF: pass receiver=logan.com; client-ip=71.74.56.122; envelope-from=clouduster@austin.rr.com Return-Path: X-Authority-Analysis: v=2.0 cv=Hsb06jvS c=1 sm=0 a=eTgKrshEm7xbomDJ3kHi1g==:17 a=409vFuCXsmoA:10 a=fg4e32LlQFkA:10 a=05ChyHeVI94A:10 a=ayC55rCoAAAA:8 a=jnaHO2MDDz8A:10 a=Ia-xEzejAAAA:8 a=N8B9JuSIAAAA:8 a=pedpZTtsAAAA:8 a=Hw9EQeqaAdo8AbQRsIUA:9 a=wPNLvfGTeEIA:10 a=EzXvWhQp4_cA:10 a=eJojReuL3h0A:10 a=4MgZD96iBIYjckaO:21 a=VdM4qVl36D8GaaWA:21 a=SSmOFEACAAAA:8 a=pGLkceISAAAA:8 a=bAKVQfQyaYXrtqQalA4A:9 a=gKO2Hq4RSVkA:10 a=UiCQ7L4-1S4A:10 a=_W_S_7VecoQA:10 a=frz4AuCg-hUA:10 a=tXsnliwV7b4A:10 a=MSl-tDqOz04A:10 a=b379sC9lxjNGAd7P:21 a=uFbUlsFNfAYI7uc4:21 a=eTgKrshEm7xbomDJ3kHi1g==:117 X-Cloudmark-Score: 0 X-Originating-IP: 72.182.13.24 Received: from [72.182.13.24] ([72.182.13.24:56837] helo=DWHPC) by hrndva-oedge02.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 61/C3-01602-52818405; Thu, 06 Sep 2012 03:27:34 +0000 Message-ID: From: "Dennis Havarlah" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Intermittent hiccup Date: Wed, 5 Sep 2012 22:27:21 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_033F_01CD8BB5.9DD86B40" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_033F_01CD8BB5.9DD86B40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I've noticed one or two in the last 4 hours of flying. My engine = hiccups have all been very mild - you notice it but to me it felt so = mild I felt that maybe it was due to one plug not firing in a cylinder = for only one event. Dennis H. ----- Original Message -----=20 From: Bill Bradburry=20 To: Rotary motors in aircraft=20 Sent: Tuesday, September 04, 2012 4:33 PM Subject: [FlyRotary] Re: Intermittent hiccup That is good data, Dennis. =20 I changed my plugs this afternoon (I had a set of RX-7 plugs so that = is what I used) and will fly tomorrow. I will check the stability of my = manifold pressure then. I installed a plastic fuel filter in the line a = while back. I have two manifold pressure lines from the intake = manifold. Each of them is "T"ed into the lawnmower fuel filter and then = they separate at a "T" and go to the two inputs to the EC-2 controller. = If it is not stable, I will try your idea of a partial blockage of the = filter inlet. =20 So with 95% the hiccup is not totally eliminated. How often would you = say you now get a hiccup? =20 Bill B =20 -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Dennis Havarlah Sent: Tuesday, September 04, 2012 11:00 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Intermittent hiccup =20 I've been using iridium plugs in my Renesis for 300 hrs. I am using = the iridium plugs that come from the factory. When I changed them at = 250 hrs I did not notice any change in performance! I use regular car = gas with ethanol and very seldom do I use 100 LL. =20 I had a hiccup every so often and could not eliminate it until I put = damper chambers in my manifold lines. I used the small plastic fuel = filters for lawnmowers (Purolator F21124). This eliminated at least 95 = % of the hiccup and my manifold pressure is very steady. With the = dampers my manifold pressure varies about 0.1 in hg up or down in = cruise. Without the damper it would vary as much as 0.3 to 0.4 in hg = in cruise. I plugged the inlet of the filter with JB and drilled a hole = about 0.032 inch in diameter through the epoxy. Check your manifold = pressure and see if it is stable. =20 Dennis H. ----- Original Message -----=20 From: David Leonard=20 To: Rotary motors in aircraft=20 Sent: Tuesday, September 04, 2012 1:29 AM Subject: [FlyRotary] Re: Intermittent hiccup =20 Yup, I suspect SAG. I go through plugs very quickly.. like 25hrs. = No cleaning will help as the electrode is worn out. You can milk them = to 100 hrs but its not really worth it. SAG gets really bad by 75 hrs. = The platinum onea last an extra hour or two. Have not tried the = iridium. Always change plugs before a long trip. Also, they come out = much easier after only 25 or so hours. --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Mon, Sep 3, 2012 at 8:46 PM, Bill Bradburry = wrote: Has anyone ever noticed a hiccup associated with sparkplug SAG? I = have a hiccup that is occurring at random intervals from seconds to = several minutes. Sometimes it is pretty mild and sometimes it shakes = the plane! I also seem to be down in power and I am beginning to = suspect plug SAG. I have 38 hours with the Iridium plugs plus a lot of = time over the years of running the engine before flight. I had a couple = instances of flooding which required that I take the plugs out and = sandblast them to get them to fire. Just drying them out didn't work. =20 Thoughts?? =20 Bill B ------=_NextPart_000_033F_01CD8BB5.9DD86B40 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I've noticed one or two in the last 4 = hours of=20 flying.  My  engine hiccups have all been very mild - you = notice it=20 but to me it felt so mild I felt that maybe it was due to one plug not = firing in=20 a cylinder for only one event.
 
Dennis H.
 
 
----- Original Message -----
From:=20 Bill=20 Bradburry
Sent: Tuesday, September 04, = 2012 4:33=20 PM
Subject: [FlyRotary] Re: = Intermittent=20 hiccup

That is = good data,=20 Dennis.

 

I changed = my plugs=20 this afternoon (I had a set of RX-7 plugs so that is what I used) and = will fly=20 tomorrow.  I will check the stability of my manifold pressure = then. =20 I installed a plastic fuel filter in the line a while back.  I = have two=20 manifold pressure lines from the intake manifold.  Each of them = is =93T=94ed=20 into the lawnmower fuel filter and then they separate at a =93T=94 and = go to the=20 two inputs to the EC-2 controller.  If it is not stable, I will = try your=20 idea of a partial blockage of the filter = inlet.

 

So with 95% = the=20 hiccup is not totally eliminated.  How often would you say you = now get a=20 hiccup?

 

Bill=20 B

 

From:=20 Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On=20 Behalf Of Dennis Havarlah
Sent: Tuesday, September 04, = 2012 11:00=20 AM
To: = Rotary motors in aircraft
Subject: [FlyRotary] Re: = Intermittent=20 hiccup

 

I've been using iridium = plugs in=20 my Renesis for 300 hrs.  I am using the iridium plugs that come = from the=20 factory.  When I changed them at 250 hrs I did not notice any = change in=20 performance!  I use regular car gas with ethanol and very seldom = do I use=20 100 LL.

 

I had a = hiccup every so often=20 and could not eliminate it until I put damper chambers in my = manifold=20 lines.  I used the small plastic fuel filters for lawnmowers = (Purolator=20 F21124).  This eliminated at least 95 % of the hiccup and my = manifold=20 pressure is very steady.  With the dampers my manifold = pressure=20 varies about 0.1 in hg up or down in cruise.  Without = the=20 damper it would vary  as much as 0.3 to  0.4 in = hg in=20 cruise.  I plugged the inlet of the filter with JB and drilled a = hole=20 about 0.032 inch in diameter through the epoxy.  Check your = manifold=20 pressure and see if it is stable.

 

Dennis=20 H.

----- Original Message = -----=20

From: David=20 Leonard

To: Rotary motors in = aircraft=20

Sent:=20 Tuesday, September 04, 2012 1:29 = AM

Subject:=20 [FlyRotary] Re: Intermittent = hiccup

 

Yup, I = suspect=20 SAG.  I go through plugs very quickly..  like 25hrs.  = No=20 cleaning will help as the electrode is worn out.  You can milk = them to=20 100 hrs but its not really worth it.  SAG gets really bad by 75 = hrs.  The platinum onea last an extra hour or two.  Have = not tried=20 the iridium.  Always change plugs before a long trip.  = Also, they=20 come out much easier after only 25 or so hours.

--
David=20 Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.nethttp://RotaryRoster.net

On Mon, Sep 3, 2012 at 8:46 PM, = Bill Bradburry <bbradburry@bellsouth.net>=20 wrote:

Has = anyone ever=20 noticed a hiccup associated with sparkplug SAG?  I have a = hiccup that=20 is occurring at random intervals from seconds to several = minutes. =20 Sometimes it is pretty mild and sometimes it shakes the plane!  = I also=20 seem to be down in power and I am beginning to suspect plug = SAG.  I=20 have 38 hours with the Iridium plugs plus a lot of time over the = years of=20 running the engine before flight.  I had a couple instances of = flooding=20 which required that I take the plugs out and sandblast them to get = them to=20 fire.  Just drying them out didn=92t = work.

 

Thoughts??

 

Bill=20 B


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