X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-kukur.atl.sa.earthlink.net ([209.86.89.65] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTP id 6653500 for flyrotary@lancaironline.net; Thu, 26 Dec 2013 10:33:26 -0500 Received-SPF: none receiver=logan.com; client-ip=209.86.89.65; envelope-from=n360tg@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=m9K56qpokcPoMcilWo8UfhJpYLULscBv077oB3lBVM83REMJCk1le1096wzed2W9; h=Received:Content-Type:Content-Transfer-Encoding:Subject:References:From:In-Reply-To:Message-Id:Date:To:Mime-Version:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [166.147.110.32] (helo=[172.20.10.7]) by elasmtp-kukur.atl.sa.earthlink.net with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.67) (envelope-from ) id 1VwCvO-00016w-UC for flyrotary@lancaironline.net; Thu, 26 Dec 2013 10:32:39 -0500 Content-Type: multipart/alternative; boundary=Apple-Mail-21042756-BD0E-428B-8363-6B7B2C2F3AB9 Content-Transfer-Encoding: 7bit Subject: Re: [FlyRotary] Re: Renesis with 76 X 88 prop References: From: Thomas Giddings In-Reply-To: Message-Id: <7CC9BFA7-A193-4C26-A2C4-BFBBBE734C6A@earthlink.net> Date: Thu, 26 Dec 2013 09:30:28 -0500 To: Rotary motors in aircraft Mime-Version: 1.0 (1.0) X-Mailer: iPad Mail (11A501) X-ELNK-Trace: 77b0437ff618fec294f5150ab1c16ac0eab4a5d23dc2aa857b236e764fdec5a9ae720c696dbdab7b350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 166.147.110.32 --Apple-Mail-21042756-BD0E-428B-8363-6B7B2C2F3AB9 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Bill: Could you post a picture of your firewall forward set up including yo= ur exhaust system with the muffler.=20 Thanks=20 Tom giddings Sent from my iPad > On Dec 25, 2013, at 11:45 AM, "Bill Bradburry" w= rote: >=20 > Mark, > =20 > It shouldn=E2=80=99t be restrictive. I am using the stock Renesis exhaust= manifold which is cut off at the level of just prior to the flywheel. The m= anifold is 3 inches in diameter at that point. I welded a 3 inch stainless p= ipe there which does a 180 bend with a radius of probably 4 inches. It then= goes into a 3 inch in/out DNA muffler, then 3 inch ss exhaust the rest of t= he way out. My EGTs have always been this high, even when I didn=E2=80=99t h= ave a muffler in the same setup. I have considered that the probes or the E= M-2 may be incorrect, but I think that there is not much calibration require= d for a K type thermocouple. I think the probes are just closer to the engi= ne than most. > =20 > Bill > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Be= half Of Mark Steitle > Sent: Wednesday, December 25, 2013 10:10 AM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: Renesis with 76 X 88 prop > =20 > Bill, > How restrictive is your exhaust? I ask because I experienced a 200 degree= increase in the EGTs on my 3-rotor when I tried a tangential style muffler.= I hadn,t made the connection until Lynn Hanover posted a message about how= sensitive the rotary is to exhaust back pressure. That,s when I figured ou= t what caused the increased EGTs, increased back pressure. I reinstalled t= he old exhaust and the EGTs mysteriously dropped back into the normal range.= Could this be the source of your high EGTs? > =20 > Mark S. >=20 > Sent from my iPad >=20 >> On Dec 23, 2013, at 9:16 PM, "Bill Bradburry" w= rote: >> Neil, >> Are both the intake and exhaust P ported? How did you do it? How did yo= u block off the side irons? I doubt there is anything wrong with our timing= or advance. I have a stock Renesis and I get EGTs from 1725 to the middle 1= 800s. >> How close to the engine are your probes? >> =20 >> Bill >> =20 >> =20 >> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On B= ehalf Of Neil Unger >> Sent: Monday, December 23, 2013 6:40 PM >> To: Rotary motors in aircraft >> Subject: [FlyRotary] Re: Renesis with 76 X 88 prop >> =20 >> Dennis, >> I have a P ported renesis and am seeing EGT up to 1850. Ha= ving talked with various people with far more knowledge than myself, who sug= gest it may be that the spark should be advanced up to around 30 BTDC. to re= duce the EGT. Rather than destroy the motor finding out, I am looking at get= ting the engine onto a dyno to clarify the timing and EGT=E2=80=99s. Should= be very interesting to say the least. No one works here until the first ha= lf of Jan has passed in this banana republic of OZ. >> =20 >> From: Dennis Havarlah >> Sent: Tuesday, December 24, 2013 8:07 AM >> To: Rotary motors in aircraft >> Subject: [FlyRotary] Re: Renesis with 76 X 88 prop >> =20 >> =20 >> =20 >> I've had server issues this week and could not send this until today. >> =20 >> Bill >> =20 >> I actually have the RD1-C PSRU. (My Bad.) Tracy started selling these abo= ut 6-7 years ago for use with the Renesis. >> The prop turns clockwise from the pilot's seat view. >> I normally see EGT's in the high 1750 F. during full power takeoff and ea= rly climb. It will go above 1800 F. if the mixture is real close to best pow= er. I have my EM-2 set to warn me if the EGTs go above 1800. >> =20 >> Dennis H. --Apple-Mail-21042756-BD0E-428B-8363-6B7B2C2F3AB9 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Bill: Could  you post a picture o= f your firewall forward set up including your exhaust system with the muffle= r. 
Thanks 
Tom giddings
Sent from my iPad<= /div>

On Dec 25, 2013, at 11:45 AM, "Bill Bradburry" <bbradburry@bellsouth.net> wrote:
=
=

Mark,

 

It shouldn=E2=80=99t be restrictive.&nb= sp; I am using the stock Renesis exhaust manifold which is cut off at the level of= just prior to the flywheel.  The manifold is 3 inches in diameter at th= at point.  I welded a 3 inch stainless pipe there which does a 180 bend wi= th a radius of probably 4 inches.  It then goes into a 3 inch in/out DNA muffler, then 3 inch ss exhaust the rest of the way out.  My EGTs have always been this high, even when I didn=E2=80=99t have a muffler in the same= setup.  I have considered that the probes or the EM-2 may be incorrect,= but I think that there is not much calibration required for a K type thermocouple.  I think the probes are just closer to the engine than mo= st.

 

Bill

From: Rotary= motors in aircraft [mailto:flyrotary@la= ncaironline.net] On Behalf Of Mark Steitle
Sent: Wednesday, December 25,= 2013 10:10 AM
To: Rotary motors in aircraft=
Subject: [FlyRotary] Re: Rene= sis with 76 X 88 prop

 

Bill,

How restrictive is your exhaust?  I ask because I experienced a= 200 degree increase in the EGTs on my 3-rotor when I tried a tangential styl= e muffler.  I hadn,t made the connection until Lynn Hanover posted a mess= age about how sensitive the rotary is to exhaust back pressure.  That,s whe= n I figured out what caused the increased EGTs, increased back pressure.   I= reinstalled the old exhaust and the EGTs mysteriously dropped back into the normal range.  Could this be the source of your high EGTs?

 

Mark S.

Sent from my iPad


On Dec 23, 2013, at 9:16 PM, "Bill Bradburry" <bbradburry@bellsouth.net> wrote:<= /font>

Neil,

Are both the intake and exhaust P ported?  How did you do it?  How did you block off the side irons?  I doubt there is anything wrong with our timing or advance.&nbs= p; I have a stock Renesis and I get EGTs from 1725 to the middle 1800s.

How close to the engine are your probes= ?

 <= /o:p>

Bill

 <= /o:p>

 <= /o:p>

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Neil Unger
Sent: Monday, December 23, 20= 13 6:40 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Rene= sis with 76 X 88 prop

 

Dennis,<= /u1:p>

  &n= bsp;           I have a P ported renesis and am seeing EGT up to 1850.  Having talked with various people with far more knowledge than myself, who suggest it may b= e that the spark should be advanced up to around 30 BTDC. to reduce the EGT. Rather than destroy the motor finding out, I am looking at getting the engin= e onto a dyno to clarify the timing and EGT=E2=80=99s.  Should be very interesting to say the least.  No one works here until the first half o= f Jan has passed in this banana republic of OZ.

 

Sent: Tuesday, December 24, 2013 8:07 AM

Subject: [FlyRotary] Re: Renesis with 76 X 88 prop

 

 =

 =

I've had server issues this week and could not send this until today.

 =

Bill

 =

I actually have the RD1-C PSRU. (My Ba= d.) Tracy started s= elling these about 6-7 years ago for use with the Renesis.

The prop turns clockwise from the pilo= t's seat view.

I normally see EGT's in the high 1750 = F. during full power takeoff and early climb. It will go above 1800 F. if the mixture is real close to best power. I have my EM-2 set to warn me if the EG= Ts go above 1800.

 =

Dennis H.

 

= --Apple-Mail-21042756-BD0E-428B-8363-6B7B2C2F3AB9--