X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp1.av-mx.com ([137.118.16.57] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3733556 for flyrotary@lancaironline.net; Fri, 26 Jun 2009 09:59:06 -0400 Received-SPF: pass receiver=logan.com; client-ip=137.118.16.57; envelope-from=res12@fairpoint.net Received: from main (unknown [66.243.228.252]) (Authenticated sender: res12@fairpoint.net) by smtp1.av-mx.com (Postfix) with ESMTP id 222A229075C for ; Fri, 26 Jun 2009 09:58:28 -0400 (EDT) Message-ID: <8FC53C6E9885441F9E05DF9EC011C1D0@main> From: "Richard Sohn" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Fwd: Re: Engine problem/ I need help Date: Fri, 26 Jun 2009 08:58:56 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003B_01C9F63C.563D7A30" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_003B_01C9F63C.563D7A30 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Chris, the flames in the exhaust could also be caused by late ignition timing. = I had that a couple of years ago on the single rotor.=20 The engine was running fine and really smooth at about 40% power. = Suddenly, the exhaust started glowing red about 10" long. After = realizing it was the first run with a new ignition setup, I investigated = and surely found an increasing late ignition timing with increasing RPM. = After this was corrected, the problem was gone. FWIW, Richard Sohn N2071U ----- Original Message -----=20 From: candtmallory@cebridge.net=20 To: Rotary motors in aircraft=20 Sent: Friday, June 26, 2009 7:44 AM Subject: [FlyRotary] Fwd: Re: Engine problem/ I need help ----- Original Message -----=20 From: To: 'Ed Anderson' Sent: Fri Jun 26 0:07 Subject: Fwd: Re: Engine problem? Thanks all for the quick responses! I was reluctant to run the engine again, but it sounds like that is = what I need to do to get more data points. I'll go out tomorrow and do = some lower power runs and see what I get. To answer some of the questions: I have about 1.5 hours total on the engine right now. I've done the = mode 3,2,1 and 9 (auto tune). Everything looked good. With about 1 = hour engine time, I started teh high power runs. I was at about 30 min = total high power time when this happened. RD1C (2.85:1) PSRU with a huge CATO prop. Standard Renesis Red and Blue injectors, I'll have to measure the = throttle body, the exhaust is short. It comes out and faces fron, then = turns 180 down and aft to the Hushpower II muffler, then 90 down and out = the cowl. I'll take a pic tomorrow. I stopped the high power runs when H2O got to 200*, oil was always = about 10* cooler. I also had to do the short runs to fill the radiator. I checked it = for full by feeling heat at the top. I'll give the oil pressure another look tomorrow, and get exact = numbers at different rpms. No noticable clank, bang, etc. The rpm just dropped off 200. THanks, Chris On Thu Jun 25 23:09 , 'Ed Anderson' sent: Hi Chris, Need some more particularizes about your installation. So its really hard to decide what might be the problem without more = data. I presume as best you could tell nothing happened (clank, bang, = backfire) when this unexpected reduction in rpm occurred? One thing you might want to check is your ignition timing static = timing alignment. IF the clamp bolt on the distributor or I believe the = Renesis use a pulley ignition timing sensor becomes loose during the run = and the timing shifted that could cause such a sudden change. Just = another thing to check. The first thing is to determine whether you really have a problem or = did something change, fuel flow, air flow, muffler? Another possibility = is if the heat stress caused your muffler to partially collapse, that = could cut your power. Best Regards Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG - www.avg.com=20 Version: 8.5.339 / Virus Database: 270.12.92/2202 - Release Date: = 06/25/09 17:58:00 ------=_NextPart_000_003B_01C9F63C.563D7A30 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Chris,
 
the flames in the exhaust could also be = caused by=20 late ignition timing. I had that a couple of years ago on the single = rotor.=20
The engine was running fine and really = smooth at=20 about 40% power. Suddenly, the exhaust started glowing red about 10" = long. After=20 realizing it was the first run with a new ignition setup, I investigated = and=20 surely found an increasing late ignition timing with increasing RPM.=20
After this was corrected, the problem = was=20 gone.
FWIW,
 
Richard Sohn
N2071U
----- Original Message -----
From:=20 candtmallory@cebridge.net =
Sent: Friday, June 26, 2009 = 7:44 AM
Subject: [FlyRotary] Fwd: Re: = Engine=20 problem/ I need help






----- Original Message ----- =
From:=20 <candtmallory@cebridge.net&g= t;
To:=20 'Ed Anderson' <eanderson@carolina.rr.com&g= t;
Sent:=20 Fri Jun 26 0:07
Subject: Fwd: Re: Engine problem?

Thanks all for the quick responses!

I was reluctant to run the engine again, but it sounds like that is = what I=20 need to do to get more data points.  I'll go out tomorrow and do = some=20 lower power runs and see what I get.

To answer some of the questions:

I have about 1.5 hours total on the engine right now.  I've = done the=20 mode 3,2,1 and 9 (auto tune).  Everything looked good.  With = about 1=20 hour engine time, I started teh high power runs.  I was at about = 30 min=20 total high power time when this happened.

RD1C (2.85:1) PSRU with a huge CATO prop.

Standard Renesis Red and Blue injectors, I'll have to measure the = throttle=20 body, the exhaust is short.  It comes out and faces fron, = then turns=20 180 down and aft to the Hushpower II muffler, then 90 down and out the = cowl.  I'll take a pic tomorrow.

I stopped the high power runs when H2O got to 200*, oil was always = about=20 10* cooler.

I also had to do the short runs to fill the radiator.  I = checked it=20 for full by feeling heat at the top.

I'll give the oil pressure = another=20 look tomorrow, and get exact numbers at different rpms.

No noticable clank, bang, etc.  The rpm just dropped off = 200.

THanks,

 

Chris

On Thu Jun 25 23:09 , 'Ed Anderson'=20 <eanderson@carolina.rr.com> sent:

Hi=20 Chris,

Need some more = particularizes=20 about your installation.

So its really hard to = decide=20 what might be the problem without more data.  I presume as best = you=20 could tell nothing happened (clank, bang, backfire) when this = unexpected=20 reduction in rpm occurred?

One thing you might = want to=20 check is your ignition timing static timing alignment.  IF the = clamp=20 bolt on the distributor or I believe the Renesis use a pulley = ignition=20 timing sensor becomes loose during the run and the timing shifted = that could=20 cause such a sudden change.  Just another thing to=20 check.

The first thing is to = determine=20 whether you really have a problem or did something change, fuel = flow, air=20 flow, muffler?  Another possibility is if the heat stress = caused your=20 muffler to partially collapse, that could cut your=20 power.

Best=20 Regards

Ed

Ed=20 Anderson

Rv-6A N494BW Rotary=20 Powered

Matthews,=20 NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.r= otaryaviation.com/Rotorhead%20Truth.htm



--

Homepage:  http://www.flyrotary.com/

Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html


No virus found in this incoming message.
Checked by AVG = -=20 www.avg.com
Version: 8.5.339 / Virus Database: 270.12.92/2202 - = Release=20 Date: 06/25/09 17:58:00
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