Return-Path: <13brv3@bellsouth.net> Received: from [209.114.234.2] (HELO IPOfCard1.guest-tek.com) by logan.com (CommuniGate Pro SMTP 4.2b2) with ESMTP id 3163483 for flyrotary@lancaironline.net; Mon, 12 Apr 2004 20:31:13 -0400 Received: from USDCLES112NB160 ([198.18.1.149]) by IPOfCard1.guest-tek.com (8.11.6/8.11.6) with SMTP id i3D0J4u25757 for ; Mon, 12 Apr 2004 20:19:04 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] EGTs Date: Mon, 12 Apr 2004 19:30:39 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0017_01C420C4.A324E700" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0017_01C420C4.A324E700 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit MessageOne question is at what percent power are these temps. Clearly they are on the high side. It was full throttle, about 6000 rpm. Normally you'd want to lean to about 100 - 150 F lean of peak. I did a lean-of-peak run at 60% power with EGTs of 1500 and a BSFC of 0.49. Did you ever get it over to lean of pea k? I did just briefly, but not understanding the 1800+ readings, I didn't want to mess with the mixture much until I knew more about what I was looking at. I'm running 9.0 : 1 rotors, so that keeps things a bit cooler. What are yours? 9.7 I'd be very nervous at 1800. Could it be unburned fuel burning out into the pipe? Timing? Plugs? Are you producing lots of power? I'm certainly moving lots of fuel through the engine, but at this point, I can't say if it's being burned, or if it's really making all that much power. The prop is such an unknown that I just can't say. Thanks, Rusty ------=_NextPart_000_0017_01C420C4.A324E700 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
One question is at what percent power are these = temps. =20 Clearly they are on the high side.   
 
It was full throttle, about 6000=20 rpm.
 

Normally you’d want to lean to about 100 – = 150 F lean of peak.=20  I did a lean-of-peak run at 60% power with EGTs of 1500 and a BSFC = of=20 0.49.  Did you ever get it over to lean of pea  k? 

 

I did just = briefly,=20 but not understanding the 1800+ readings, I didn't want to mess = with the=20 mixture much until I knew more about what I was looking at. =20  

 

I’m running 9.0 : 1 rotors, so that keeps things a = bit cooler.=20 What are yours? 

 

9.7

    

I’d be very nervous at 1800.  Could it be = unburned fuel=20 burning out into the pipe?  Timing?  Plugs?  Are you = producing=20 lots of power? 

 

I'm certainly = moving=20 lots of fuel through the engine, but at this point, I can't = say if=20 it's being burned, or if it's really making all that much = power.  The=20 prop is such an unknown that I just can't=20 say. 

 

Thanks,

Rusty

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