X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=XpSExmN9 c=1 sm=1 tr=0 a=eqoqLvBUNPvazRlrm8cjfA==:117 a=3YhXtTcJ-WEA:10 a=x7bEGLp0ZPQA:10 a=A-0mRrAPPO4A:10 a=o1OHuDzbAAAA:8 a=Ia-xEzejAAAA:8 a=_6GpL_ENAAAA:8 a=kNahqX1Bb1KOXYkb8IQA:9 a=QEXdDO2ut3YA:10 a=LeG1iBednaAJxSu12bkA:9 a=8_gBbBhnu-6MwW2I:21 a=5YQ6H4ZxyGn-KoBYtt8s:22 a=Urk15JJjZg1Xo0ryW_k8:22 From: "Charlie England ceengland7@gmail.com" Received: from mail-lj1-f170.google.com ([209.85.208.170] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 1461387 for flyrotary@lancaironline.net; Wed, 28 Apr 2021 17:58:18 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.208.170; envelope-from=ceengland7@gmail.com Received: by mail-lj1-f170.google.com with SMTP id z23so27513176lji.4 for ; Wed, 28 Apr 2021 14:58:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=kYN88blZem1sYJOnJKIFFpLZAtsF7q3XXe4Tg4IEB1s=; b=rAk+JEPUG0Qne6ZlLYSHgrauwpbsVqHyyEzwv9Zx2YYVmSxlSl/HrVAjHfAH6WqX9M 368sbU05FNxY4aIhayB/9lk+rzoTWGGPpOi0+rWB+gxG4SeWpQrVeI+fz3yzt+z4G67W KQ3LRC4/A+EGSXB/aI6SyDOtbqIhCiQtCqfWTqr6GwP3reISSYpuoAXJHgK68hRsRd+g 3TOS4cpM2jKSF9h5vEk6dopyvZAUKFDZYUARR9Gm/Bg4ad//Y+xtaWqeDOHP9F0ROahC M7CZE8d/xwt07rUiNU6Kf20xHv1Oa24LcLEWgNus45yrc6gHolPXZZdmllXIH3Z1YbSY Kh4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=kYN88blZem1sYJOnJKIFFpLZAtsF7q3XXe4Tg4IEB1s=; b=EKzSxCSjR8dHsbY8u9VdlmrmbpbKsSSlIQgqCAhpv6DmOQriTPUg8W2OpZnghQw14K TrlDmxWvXWr7F03u8eqiz/ThgmxC3evibZWhwhnlLwehd8I6wi/1TmCHBGPTsGGx/QGj qlkx5nRn7xb51TNhLUMGzB8y3i+P6FYNRr2BOCmlh3whwp1la9Nt1oMQ71JGIzb3RXNU DApqqDgwGHDc5xzxxql7hswyGUh/q1Y4hXAvG/MD7rN8OuEXhK3KhQsCMtUbCPbJSECy TeaClxff/7lJx0Q+Z2/bBc9tvQaqGtgddm6WeCpc6+uBz5hfpLgyC7gL/D6upl4aynhh RZnw== X-Gm-Message-State: AOAM533W4n6M4Jzt0NuG8uGhc+DwllPj+JOYLQt3PygRJvius7jNmnyA VfuXB3HDws/t5B02kgIzLDZNlrjUCThxb7SYDN30A0m/ X-Google-Smtp-Source: ABdhPJwW7RoRoXEfYSywKtv2dmfxdqDyH7QMw0jltaleDF9Kwm2BasNX/I2NQA0Wrq456FGonwlEfPVxz+Bm1NOseLw= X-Received: by 2002:a2e:b0dc:: with SMTP id g28mr22439039ljl.142.1619647081075; Wed, 28 Apr 2021 14:58:01 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Wed, 28 Apr 2021 16:55:51 -0500 Message-ID: Subject: Re: [FlyRotary] EGT probes location To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000edd65505c10f78d5" --000000000000edd65505c10f78d5 Content-Type: text/plain; charset="UTF-8" On Wed, Apr 28, 2021 at 4:31 PM Finn Lassen finn.lassen@verizon.net < flyrotary@lancaironline.net> wrote: > So, I'm using the Renesis stock exhaust manifold. > > Tried to mount the EGT probes as close as possible and same distance > from the ports. > > However, at high power I'm seeing as much as 120F higher on rotor 2. > > Exhaust gas from rotor 1 passes by rotor 2 exhaust port so I'm wondering > if that somehow increases rotor 2 EGT readings. > > Caught my attention today when EGT2 got above 1,800F at 6,200 RPM and > 161 mph TAS @ 3,300' density altitude. > > Any of you that's using the stock exhaust manifold run into this? > > Finn > That would make sense. There's a lot more energy at the 2nd port where they merge than at the other end of the manifold, so that section is 'preheated'. Having said that, Lyc probes are never that close to the exhaust flange. Supposedly, the exhaust temp drops rapidly as you move downstream from the port, in piston engines. Charlie Virus-free. www.avast.com <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> --000000000000edd65505c10f78d5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Wed, Apr 28, 2021 at 4:31 PM Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net>= wrote:
So, I= 9;m using the Renesis stock exhaust manifold.

Tried to mount the EGT probes as close as possible and same distance
from the ports.

However, at high power I'm seeing as much as 120F higher on rotor 2.
Exhaust gas from rotor 1 passes by rotor 2 exhaust port so I'm wonderin= g
if that somehow increases rotor 2 EGT readings.

Caught my attention today when EGT2 got above 1,800F at 6,200 RPM and
161 mph TAS @ 3,300' density altitude.

Any of you that's using the stock exhaust manifold run into this?

Finn
That would make sense. There's a lot more energy at the 2nd port= where they merge than at the other end of the manifold, so that section is= 'preheated'. Having=C2=A0said that, Lyc probes are never that clos= e to the exhaust flange. Supposedly, the exhaust temp drops rapidly as you = move downstream from the port, in piston engines.

Charlie

3D"" Virus-free. www.avast.com
--000000000000edd65505c10f78d5--