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Date: Sat, 20 Nov 2010 10:18:28 -0600
Message-ID: <AANLkTik74X6BK2E7b+--QpiaG43GYFN6-08Sx_vHW6rF@mail.gmail.com>
Subject: Re: [FlyRotary] Exhaust Calcuations
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=0015174c19828f11d604957e5fbb

--0015174c19828f11d604957e5fbb
Content-Type: text/plain; charset=ISO-8859-1

Ed,

OK, that answers my question.  By going with 1-7/8" OD pipe (.049 wall), it
would be tuned for about 7800 rpm.  Obviously, this is too high for our
purposes.  I'll go with 1-5/8 (.063 wall) to shoot for 6700 rpm peak power.
 This is typically the rpm I see on ground roll and early climb before I
start adjusting the prop down to a lower rpm to transition to cruise climb.

Have you used the header designer tool available from Burns Stainless?  You
need to know all the timing numbers, rpm, etc.  I may give it a try and see
what I come up with.  I have a test p-port housing that I made up to see if
the tube could be welded to the inner liner.  So, I can use that with a
spare rotor to verify the EVO and EVC numbers.

Mark


On Sat, Nov 20, 2010 at 9:55 AM, Ed Anderson <eanderson@carolina.rr.com>wrote:

>  Mark,
>
> Here is the corrected spreadsheet - I've colored the changeable cells blue
> - you can plug in any rpm and EVO.  The rest of the cells are protected to
> keep from accidently overwriting them.
>
> Ed
>
> Edward L. Anderson
> Anderson Electronic Enterprises LLC
> 305 Reefton Road
> Weddington, NC 28104
> http://www.andersonee.com
> http://www.eicommander.com
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
>

--0015174c19828f11d604957e5fbb
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Ed,<div><br></div><div>OK, that answers my question. =A0By going with 1-7/8=
&quot; OD pipe (.049 wall), it would be tuned for about 7800 rpm. =A0Obviou=
sly, this is too high for our purposes. =A0I&#39;ll go with 1-5/8 (.063 wal=
l) to shoot for 6700 rpm peak power. =A0This is typically the rpm I see on =
ground roll and early climb before I start adjusting the prop down to a low=
er rpm to transition to cruise climb.<div>
<br></div><div>Have you used the header designer tool available from Burns =
Stainless? =A0You need to know all the timing numbers, rpm, etc. =A0I may g=
ive it a try and see what I come up with. =A0I have a test p-port housing t=
hat I made up to see if the tube could be welded to the inner liner. =A0So,=
 I can use that with a spare rotor to verify the EVO and EVC numbers. =A0</=
div>
<div>=A0</div><div>Mark</div><div><br><br><div class=3D"gmail_quote">On Sat=
, Nov 20, 2010 at 9:55 AM, Ed Anderson <span dir=3D"ltr">&lt;<a href=3D"mai=
lto:eanderson@carolina.rr.com">eanderson@carolina.rr.com</a>&gt;</span> wro=
te:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex;">



<div style=3D"padding-left:10px;padding-right:10px;padding-top:15px" name=
=3D"Compose message area">
<div><font face=3D"Arial">Mark, </font></div>
<div><font face=3D"Arial"></font>=A0</div>
<div><font face=3D"Arial">Here is the corrected spreadsheet - I&#39;ve colo=
red the=20
changeable cells blue - you can plug in any rpm and EVO.=A0 The rest of the=
=20
cells are protected to keep from accidently overwriting them.</font></div>
<div><font face=3D"Arial"></font>=A0</div>
<div><font face=3D"Arial">Ed</font></div>
<div>=A0</div>
<div><font face=3D"Arial">Edward L. Anderson<br>Anderson Electronic Enterpr=
ises=20
LLC<br>305 Reefton Road<br>Weddington, NC 28104<br><a href=3D"http://www.an=
dersonee.com" target=3D"_blank">http://www.andersonee.com</a><br><a href=3D=
"http://www.eicommander.com" target=3D"_blank">http://www.eicommander.com</=
a><br>
</font></div></div>
<br>--<br>
Homepage: =A0<a href=3D"http://www.flyrotary.com/" target=3D"_blank">http:/=
/www.flyrotary.com/</a><br>
Archive and UnSub: =A0 <a href=3D"http://mail.lancaironline.net:81/lists/fl=
yrotary/List.html" target=3D"_blank">http://mail.lancaironline.net:81/lists=
/flyrotary/List.html</a><br>
<br></blockquote></div><br></div></div>

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