X-Virus-Scanned: clean according to Sophos on Logan.com From: "William Jepson" Received: from mail-ua0-f173.google.com ([209.85.217.173] verified) by logan.com (CommuniGate Pro SMTP 6.2c3) with ESMTPS id 9737598 for flyrotary@lancaironline.net; Tue, 09 May 2017 17:23:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.217.173; envelope-from=wrjjrs@gmail.com Received: by mail-ua0-f173.google.com with SMTP id j17so15157170uag.3 for ; Tue, 09 May 2017 14:24:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=PJHww85RWH4HTm2jIHCBy8PhsJDN1mRIJ3s4te+62Nc=; b=FE31xZjYqMNnlkSNp+voyZijWotdSxs+0whM3wHc82oU4xbONDuSQsHxK1vt6GXkOf 2nVoaxR7OLpU628/toTr+zaq/lsE75oiyIZc9PYSFs3x5RjlPJF9DrmzSOy25BrqmTZi bUobQA9CPfvX/hfjDX9rjoDUhHH1HnUNE1dnb4Qk9I7Igk6p/5P3gEItUrM9/8WAwGPy RWv7oGzo9bwINphI7rM3vEbS/5Hqs44LUMBCJ22i8OpPUtof7zYyQqEuFm7j85j6vreS HEmSWKIk8Yb0+uytnFvd/HVAezNMsz833MFpGvkMH82Ay9lyPY7GEaIVczzasRIUx+bm MLcw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=PJHww85RWH4HTm2jIHCBy8PhsJDN1mRIJ3s4te+62Nc=; b=kUwRl99zN/d6OYqRAj3f9btfnR0uQ9p9lAQqZd0yuOywZUUsQeCa6tveW7Gbo8NNB5 K+1rYU3QjoltII+ztQ4IryaR1LTdKcrjQpECRn2NnYvmSc5LUwwZC1h4JesgUZW+KWIu 5a1vNmTLnk6pEZFERgxfsQM6XnlvYH6aeFlMVe0fxEP8Kxmaz6puU9WUm6pqnnzjaluY zTv0BwIRJPq335s7fALZPKf+vz8/SCtWaWsg61uJyMD3iiHgRwixXiHb74t+/ApKzA/5 APDv9m1uQFAV1AsQgvVefnqreZibpf21x/b/TULX/P/NQawxv4gDcvqZ5HepqKu3O72j 9ATg== X-Gm-Message-State: AODbwcBMrS5lNF8/6XwrFemk52WDWMlllmdQ6FXw/H9a2zbcma+JnB50 0xi+JsYgywAGBsjYd5fGiFq41kVUog== X-Received: by 10.159.51.232 with SMTP id y40mr1190702uab.76.1494365022515; Tue, 09 May 2017 14:23:42 -0700 (PDT) MIME-Version: 1.0 Received: by 10.31.163.131 with HTTP; Tue, 9 May 2017 14:23:42 -0700 (PDT) In-Reply-To: References: Date: Tue, 9 May 2017 14:23:42 -0700 Message-ID: Subject: Re: [FlyRotary] Re: F/A and EGT data To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=f403043ec40454f8ed054f1df8d1 --f403043ec40454f8ed054f1df8d1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Bobby, While being under boost does change the intake side a bit ports and manifolds do have some effect. Exhaust systems have more effect. Are you still running the belt driven supercharger? Or have you gone turbo? Bill On Tue, May 9, 2017 at 10:36 AM, Bobby J. Hughes < flyrotary@lancaironline.net> wrote: > Bill / Jeff, > > > > In a normally aspirated engine I would agree. However under boost I think > it=E2=80=99s safer to match F/A for each rotor under the most demanding > conditions. For me that=E2=80=99s 38-40=E2=80=9D MP and 7000 rpm. But I = can=E2=80=99t explain the > inflight EGT changes just by twisting the mixture knob? I would expect th= e > EGT spread would remain almost the same. I=E2=80=99m suspecting one of th= e > injectors is not behaving properly. > > > > *MP* > > *RPM* > > *F/A- Combined* > > *F/A Rotor 1* > > *EGT Rotor 1* > > *F/A Rotor 2* > > *EGT Rotor 2* > > *EGT Spread* > > *Condition* > > *31.0* > > *5200* > > *13.4* > > > > *1524* > > > > *1587* > > *63* > > *Flight* > > *31.3* > > *5200* > > *15.7* > > > > *1543* > > > > *1558* > > *15* > > *Flight* > > *31.2* > > *5200* > > *13.2* > > > > *1525* > > > > *1592* > > *67* > > *Flight* > > > > MP and RPM with constant speed prop were steady for this test. Fuel Map > table address being used were stable. Some bouncing between two adjacent > addresses with similar programmed values. Slower airspeed at 15.7 F/A but > the constant speed prop maintains the target rpm. > > > > Bobby > > > > > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] > *Sent:* Tuesday, May 09, 2017 1:11 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: F/A and EGT data > > > > Bobby, I agree with Jeff. Since there are ALWAYS minor variances in the > intake, porting, exhaust lengths, or even the actual bends of the exhaust > it is unlikely that you will remain synced up across the range. I talked = to > Ross Farnham at SDSEFI and he commented that was why he put tune on the f= ly > ability for individual cylinders / rotors into his EFI. > > Bill Jepson > > > > On Tue, May 9, 2017 at 8:44 AM, Jeff Whaley > wrote: > > From memory, reading the EC2 Manual it states that rotor balancing should > be performed at your preferred cruise rpm as it will remain balanced over= a > very narrow range. I'm sure you know: Static and in-flight engine > performance will not be the same, regardless if the RPMs and MPs are > matched. > Jeff > > From: Bobby J. Hughes > Subject: F/A and EGT data > Date: Tue, 9 May 2017 10:12:07 -0500 > To: Rotary motors in aircraft > > I recently purchased a two channel portable wideband O2 system and > installed bungs and plugs on each exhaust runner. I also have a downstrea= m > wideband that I have been using for several years. I was able to spend a > very productive hour ground tuning and adjusting Mode 4 injector balance > prior to my flight yesterday from Austin to Akron OH. I'm not sure what t= o > make of the F/A EGT spread data I collect during yesterday's flight. > > During the ground tuning session I balanced rotor 1 to match rotor 2 usin= g > F/A ratios for takeoff condition. This produced very close EGT readings. > However at my preferred cruise settings I'm seeing a large EGT spread. I > would expect a consistent EGT ratio change when adjusting the mixture kno= b > at a steady rpm / MP. This appears not to be the case. What am I missing= ? > > Bobby Hughes > This message, and the documents attached hereto, is intended only for the > addressee and may contain privileged or confidential information. Any > unauthorized disclosure is strictly prohibited. If you have received this > message in error, please notify us immediately so that we may correct our > internal records. Please then delete the original message. Thank you. > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline. > net:81/lists/flyrotary/List.html > > > --f403043ec40454f8ed054f1df8d1 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Bobby, While being under boost does change the intake side= a bit ports and manifolds do have some effect. Exhaust systems have more e= ffect. Are you still running the belt driven supercharger? Or have you gone= turbo?
Bill=C2=A0

On Tue, May 9, 2017 at 10:36 AM, Bobby J. Hughes <flyrotary@lancaironline.net> wrote:

Bill / Jeff,

=C2=A0

In a normally aspirated engine I would ag= ree. However under boost I think it=E2=80=99s safer to match F/A for each r= otor under the most demanding conditions.=C2=A0 For me that=E2=80=99s 38-40= =E2=80=9D MP and 7000 rpm. But I can=E2=80=99t explain the inflight EGT cha= nges just by twisting the mixture knob? I would expect the EGT spread would= remain almost the same. I=E2=80=99m suspecting one of the injectors is not= behaving properly.

=C2=A0

<= tr style=3D"height:15.0pt">

RPM

= = <= p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">=C2=A0

<= td width=3D"75" nowrap valign=3D"bottom" style=3D"width:56.0pt;border-top:n= one;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:soli= d windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">

5200

MP

F/A- Combined

F/A Rotor 1

EGT Rotor 1

F/= A Rotor 2

EGT R= otor 2

EGT Spr= ead

Condition=

31.0

5200

13.4

=C2=A0

1524=

=C2=A0

1587

63

Flight

31.3=

5200

15.7

1543

=C2=A0

1558

15

Flight

31.2

13.2<= /span>

=C2=A0

1525

= =C2=A0

1592=

67

Flight<= /u>

<= span style=3D"font-size:11.0pt;font-family:"Calibri","sans-s= erif";color:#1f497d">=C2=A0

MP and RPM with constant speed prop were st= eady for this test. Fuel Map table address being used were stable. Some bou= ncing between two adjacent addresses with similar programmed values. Slower= airspeed at 15.7 F/A but the constant speed prop maintains the target rpm.=

=C2=A0

Bobby

=C2=A0

=C2=A0

= From: Rotary motors in aircraft [mailto:= flyrotary@= lancaironline.net]
Sent: Tuesday, May 09, 2017 1:11 PM<= span class=3D"">
To: Rotary motors in aircraft
Subje= ct: [FlyRotary] Re: F/A and EGT data

=C2=A0

Bobby, I agree with Jeff. Since there are ALWAYS minor varia= nces in the intake, porting, exhaust lengths, or even the actual bends of t= he exhaust it is unlikely that you will remain synced up across the range. = I talked to Ross Farnham at SDSEFI and he commented that was why he put tun= e on the fly ability for individual cylinders / rotors into his EFI.=

Bill Jepson

<= /div>

=C2=A0

On Tue, May 9, 2017 at 8:44 AM, Jeff Whaley <flyrotary@lancaironline.net= > wrote:

From memory, readin= g the EC2 Manual it states that rotor balancing should be performed at your= preferred cruise rpm as it will remain balanced over a very narrow range. = I'm sure you know: Static and in-flight engine performance will not be = the same, regardless if the RPMs and MPs are matched.
Jeff

From:= =C2=A0 =C2=A0Bobby J. Hughes <flyrotary@lancaironline.net>
Subject:=C2= =A0 =C2=A0 =C2=A0 =C2=A0 F/A and EGT data
Date:=C2=A0 =C2=A0Tue, 9 May 2= 017 10:12:07 -0500
To:=C2=A0 =C2=A0 =C2=A0Rotary motors in aircraft <= flyrotary@= lancaironline.net>

I recently purchased a two channel=C2=A0 p= ortable wideband O2 system and installed bungs and plugs on each exhaust ru= nner. I also have a downstream wideband that I have been using for several = years. I was able to spend a very productive hour ground tuning and adjusti= ng Mode 4 injector balance prior to my flight yesterday from Austin to Akro= n OH. I'm not sure what to make of the F/A EGT spread data I collect du= ring yesterday's flight.

During the ground tuning session I bala= nced rotor 1 to match rotor 2 using F/A ratios for takeoff condition. This = produced very close EGT readings. However at my preferred cruise settings I= 'm seeing a large EGT spread. I would expect a consistent EGT ratio cha= nge when adjusting the mixture knob at a steady rpm / MP.=C2=A0 This appear= s not to be the case. What am I missing?

Bobby Hughes
This messag= e, and the documents attached hereto, is intended only for the addressee an= d may contain privileged or confidential information. Any unauthorized disc= losure is strictly prohibited. If you have received this message in error, = please notify us immediately so that we may correct our internal records. P= lease then delete the original message. Thank you.

--
Homepage:= =C2=A0 http://www.f= lyrotary.com/
Archive and UnSub:=C2=A0 =C2=A0http://ma= il.lancaironline.net:81/lists/flyrotary/List.html

=C2=A0


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