X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao101.cox.net ([68.230.241.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3310221 for flyrotary@lancaironline.net; Thu, 20 Nov 2008 23:12:19 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.45; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao101.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20081121041144.NNJC12520.fed1rmmtao101.cox.net@fed1rmimpo03.cox.net> for ; Thu, 20 Nov 2008 23:11:44 -0500 Received: from wills ([68.105.85.56]) by fed1rmimpo03.cox.net with bizsmtp id hgBh1a00W1CvZmk04gBjFn; Thu, 20 Nov 2008 23:11:43 -0500 X-Authority-Analysis: v=1.0 c=1 a=TEtekHL6R3AA:10 a=jGLZma-M224A:10 a=CkhJKihrO9WvhPr-3AEA:9 a=-ley6PSCLjYg6UOvWKoA:7 a=I966MbWTjcPt7BIbs2maIqTG5TcA:4 a=ziFrdkHw70AA:10 a=X2PLLMSNHxdT__a4JyoA:9 a=KTBL5tBHSvYZ2SX6bgUA:7 a=fk7__EZeQ9_IgPHu55yV6lAeRV8A:4 a=SVqzirnCOXUA:10 a=EzXvWhQp4_cA:10 a=AfD3MYMu9mQA:10 X-CM-Score: 0.00 Message-ID: <00b901c94b8f$426f80a0$38556944@wills> From: "Mike Wills" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] high EGT temps Rotor #1 Date: Thu, 20 Nov 2008 20:11:41 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00B6_01C94B4C.3404B050" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 This is a multi-part message in MIME format. ------=_NextPart_000_00B6_01C94B4C.3404B050 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Don, Cant add anything about your problem, but if you have the quietest = airplane on the airport I want to know more about your exhaust system. = Including pictures. I have the loudest airplane at my airport (and the = quietest too, but I guess the glider doesnt count does it?). Mike Wills RV-4 N144MW ----- Original Message -----=20 From: Don Walker=20 To: Rotary motors in aircraft=20 Sent: Monday, November 17, 2008 9:38 AM Subject: [FlyRotary] high EGT temps Rotor #1 Rotorians, Now that the airplane is painted, weighed, prop ballenced and etc. = I'm into tuning and getting comfortable with the engine. Yesterday I = noticed that as I ran the engine up, #1 rotor EGT trailed #2 by 20 to 30 = degrees and then at about 20 inches of manifold, #1 started climbing = rapidly! At max static throttle 5828 rpm (prop speed of 2045) or so, = #1 runs to 1640 degrees while #2 maxes at 1480 degrees. I played with = the mixture etc. No difference. I have checked the plugs and swaped = them. No difference. Stock RX-7 plugs. Pulled one and then the other = secondary inj. connector. It starts and runs and then drops off as RPM = gets high. Same on both #1 and 2. Swapped injectors. No difference. = Tryed using Mode 4, both to increase mixture and then to decrease. No = difference. Reset Mode 4 back to default. Swapped EGT probes. High = temps showed up on #2 on EM-2. Swapped back. Checked the archives. = Nothing. The EGT probes are installed through holes in the exhaust 5 = inches from the engine outlet. So I am at a loss. Any thoughts on = what might be causing this? Engine basically running smooth and strong. = Months ago, I remember getting 6150 RPM, but couldn't get it to run = long enough to check out EGTs. Cooling problems. A couple of other = things that may or may not have anything to do with this. Manifold = display on EM-2 sometimes jumps around some. I have tried porting to = the front of the intake and to the rear. Now I have it teed to both. = Auto tune tries to work, but does not. (O2 sensor installed at end of = tangenial) I ran it almost 2.5 hours total yesterday. 11.7 hours = total. since last December. Quietest airplane on the field. Lots of = attention from other pilots. Don Walker RV-8 N113BR Renesis 4 port. RD-1c EC-2 EM-2 Tuned 17.5 inch intake. Tuned 24 inch exhaust into tangetial premuffler catto 76/88. Field elevation 5000 ft. density 6200 ------=_NextPart_000_00B6_01C94B4C.3404B050 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Don,
 
 Cant add anything about your = problem, but if=20 you have the quietest airplane on the airport I want to know more about = your=20 exhaust system. Including pictures. I have the loudest airplane at my = airport=20 (and the quietest too, but I guess the glider doesnt count does=20 it?).
 
Mike Wills
RV-4 N144MW
----- Original Message -----
From:=20 Don = Walker=20
Sent: Monday, November 17, 2008 = 9:38=20 AM
Subject: [FlyRotary] high EGT = temps Rotor=20 #1

Rotorians,
Now that the airplane is painted, = weighed, prop=20 ballenced and etc.  I'm into tuning and getting comfortable with = the=20 engine.  Yesterday I noticed that as I ran the engine up, #1 = rotor EGT=20 trailed #2 by 20 to 30 degrees and then at about 20 inches of = manifold, #1=20 started climbing rapidly!   At max static throttle 5828 rpm = (prop=20 speed of 2045) or so,  #1 runs to 1640 degrees while #2 maxes at = 1480=20 degrees.  I played with the mixture etc.  No = difference.  I=20 have checked the plugs and swaped them.  No difference.  = Stock RX-7=20 plugs.  Pulled one and then the other secondary inj.=20 connector.  It starts and runs and then drops off as RPM gets = high. =20 Same on both #1 and 2.  Swapped injectors.  No = difference. =20 Tryed using Mode 4, both to increase mixture and then to = decrease.  No=20 difference.  Reset Mode 4 back to default.  Swapped EGT=20 probes.  High temps showed up on #2 on EM-2.  Swapped = back. =20 Checked the archives.  Nothing.  The EGT probes are = installed=20 through holes in the exhaust 5 inches from the engine outlet.  =  So I=20 am at a loss.  Any thoughts on what might be causing this?  = Engine=20 basically running smooth and strong.  Months ago, I remember = getting 6150=20 RPM, but couldn't get it to run long enough to check out EGTs.  = Cooling=20 problems.  A couple of other things that may or may not have = anything to=20 do with this. Manifold display on EM-2 sometimes jumps around = some. =20 I have tried porting to the front of the intake and to the = rear. =20 Now I have it teed to both.  Auto tune tries to work, but does = not. =20 (O2 sensor installed at end of tangenial)  I ran it almost 2.5 = hours=20 total yesterday.  11.7 hours total. since last December.  = Quietest=20 airplane on the field.  Lots of attention from other = pilots.
 
Don Walker
RV-8 N113BR
Renesis 4 port. RD-1c
EC-2 EM-2
Tuned 17.5 inch intake.
Tuned 24 inch exhaust into tangetial=20 premuffler
catto 76/88.  Field elevation = 5000 ft. =20 density 6200
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