No subject

Sun Dec 16 17:37:43 CST 2007

aircraft installation, not the engine model.  So, you can't just say
IO-540-C4B5 and be guaranteed you will have the correct brackets.  Maybe you
will, maybe you won't.  You need to check.

As there was a possibility of having the wrong part, my luck held. Ha!   

I have spent the last couple of days working on getting the 70456 brackets.
I have spoken with G&N, Mattituck, Wentworth, White Industries, Don George,
Aircraft Specialty Services,  Colorado Air Parts, Reno Aviation, Air Parts
Inc, etc.  I bet I called 15 different places.

A couple of years ago this was a non-issue.  Engine building shops had ample
supplies of both types and many were willing to do a straight up swap.
Well, times have changed and the RV-10 happened.  Van's engine mount is
designed for Dynafocal 1 and they have been soaking up the available supply.
If a shop has them, they are not eager to give them up.  They have plenty of
the 2", 72306.

I was very fortunate to speak with Derrick Slack at Penn Yan Aero.  This
wonderful man was willing to make the exchange with me.  I did get the
distinct feeling that he might not be able to make the same trade in the
future.

FWIW, A.E.R.O. now makes a billet version of our 70456 mount.  Non-PMA,
experimental use only.  Looks great.  $93.75/ea.

Maybe Velocity will look into offering Dynafocal 2 in the future.  Maybe
people are moving enough to the Continental that this is a non-issue???

Another note just for general knowledge:

Velocity provides the Barry mounts 94110-02  with our install kits.  Barry
lists this as the mount for the 300 HP IO-540s.  They list the 94110-01 as
the mount for the 260HP IO-540.  First, I had every confidence that Velocity
sent the right mounts.  But, since another part was listed for the
application I figured I would like to know the difference.  I wrote to Barry
controls.  Here is the reply:

-------------------------

To answer your question, the spring rates of the two isolators are similar
and dimensionally they are identical. The major difference between the two
parts is the rubber used to fabricate them. The 94110-01 is a natural rubber
isolator, the 94110-02 is a butyl rubber isolator.

Natural rubber has better tear resistance than butyl rubber, but butyl
rubber has a higher temperature limit than natural rubber.

I hope this has been helpful, please let us know if we can be of further
assistance.

Thank you,

Todd Thomas

Manager, Technical Services

Accountable Manager, FAA Repair Station #UT3R905L Barry Controls Aerospace
4510 Vanowen Burbank, CA  91505

FWIW,

Andy

=====================================

Andy Millin

amillin at sbcglobal.net

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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Andy<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Thanks for thinking about the rest =
of
us.&nbsp; It&#8217;s the glue of this community of gluers.&nbsp; =
<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Terry<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<div>

<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
size=3D3
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;font-family:"Times New Roman"'>

<hr size=3D2 width=3D"100%" align=3Dcenter tabindex=3D-1>

</span></font></div>

<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'>
reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] <b><span
style=3D'font-weight:bold'>On Behalf Of </span></b>Andy Millin<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thursday, January =
03, 2008
3:02 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> '<st1:PersonName =
w:st=3D"on"><st1:PersonName
 w:st=3D"on">Velocity Aircraft</st1:PersonName> Owners and Builders =
list</st1:PersonName>'<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> REFLECTOR: =
Mounting up
your IO-540</span></font><font size=3D3 face=3D"Times New Roman"><span
style=3D'font-size:12.0pt;font-family:"Times New =
Roman"'><o:p></o:p></span></font></p>

</div>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>Happy
new year all!<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>If
you are not planning on using a Lycoming IO-540 engine, then you =
won&#8217;t
need the information that follows.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>I
recently had a wonderful opportunity for Recreation and Education!&nbsp; =
So
much Recreation and Education, that I thought I might just share it with =
the
group.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>I
am using a parallel valve IO-540.&nbsp; It has come to my attention that
Lycoming makes two different types of engine mounting brackets for the =
540
series.&nbsp; This includes the K series, 300 =
HP.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

The
dynafocal 1 mount uses Lycoming part number 70456.&nbsp; $369/ea. new =
from
Lycoming.&nbsp; This mount has a 30 degree rake angle and a mounting =
hole 1.380
I.D.&nbsp; This is the mounting bracket that Velocity has designed their
tubular engine mount for.&nbsp; Velocity also includes the Barry mounts =
for
this bracket in the kit.&nbsp; If you are planning on using the Velocity
install kit, you might want to make sure you have the correct =
brackets.<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

Dynafocal
2 uses Lycoming part number 72306.&nbsp; $473/ea. new from =
Lycoming.&nbsp; This
mount has a 20 degree rake angle and a hole 2.000 I.D.&nbsp; Different =
size,
different geometry.&nbsp; You can&#8217;t just buy larger Barry mounts =
and bolt
everything together.<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>From
what information I have found, the brackets were specific to the =
aircraft
installation, not the engine model.&nbsp; So, you can&#8217;t just say
IO-540-C4B5 and be guaranteed you will have the correct brackets.&nbsp; =
Maybe
you will, maybe you won&#8217;t.&nbsp; You need to =
check.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

As
there was a possibility of having the wrong part, my luck held. Ha! =
&nbsp;&nbsp;<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>I
have spent the last couple of days working on getting the 70456 =
brackets.&nbsp;
I have spoken with G&amp;N, Mattituck, Wentworth, White Industries, Don =
George,
Aircraft Specialty Services,&nbsp; Colorado Air Parts, Reno Aviation, =
Air Parts
Inc, etc&#8230;&nbsp; I bet I called 15 different =
places.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

A
couple of years ago this was a non-issue.&nbsp; Engine building shops =
had ample
supplies of both types and many were willing to do a straight up =
swap.&nbsp;
Well, times have changed and the RV-10 happened.&nbsp; Van&#8217;s =
engine mount
is designed for Dynafocal 1 and they have been soaking up the available =
supply.
&nbsp;&nbsp;If a shop has them, they are not eager to give them =
up.&nbsp; They
have plenty of the 2&#8221;, 72306.<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>I
was very fortunate to speak with Derrick Slack at Penn Yan Aero.&nbsp; =
This
wonderful man was willing to make the exchange with me.&nbsp; I did get =
the
distinct feeling that he might not be able to make the same trade in the
future.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

FWIW,
A.E.R.O. now makes a billet version of our 70456 mount.&nbsp; Non-PMA,
experimental use only.&nbsp; Looks great.&nbsp; =
$93.75/ea.<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>Maybe
Velocity will look into offering Dynafocal 2 in the future.&nbsp; Maybe =
people
are moving enough to the Continental that this is a =
non-issue???<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>Another
note just for general knowledge:<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>Velocity
provides the Barry mounts 94110-02 &nbsp;with our install kits.&nbsp; =
Barry
lists this as the mount for the 300 HP IO-540s.&nbsp; They list the =
94110-01 as
the mount for the 260HP IO-540.&nbsp; First, I had every confidence that
Velocity sent the right mounts.&nbsp; But, since another part was listed =
for
the application I figured I would like to know the difference.&nbsp; I =
wrote to
Barry controls.&nbsp; Here is the reply:<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>-------------------------<o:p></o:p></span></f=
ont></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

To
answer your question, the spring rates of the two isolators are similar =
and
dimensionally they are identical. The major difference between the two =
parts is
the rubber used to fabricate them. The 94110-01 is a natural rubber =
isolator,
the 94110-02 is a butyl rubber isolator.<o:p></o:p>

<p class=3DMsoPlainText><font size=3D2 face=3DConsolas><span =
style=3D'font-size:10.5pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3DConsolas><span =
style=3D'font-size:10.5pt'>Natural
rubber has better tear resistance than butyl rubber, but butyl rubber =
has a
higher temperature limit than natural =
rubber.<o:p></o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3DConsolas><span =
style=3D'font-size:10.5pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3DConsolas><span =
style=3D'font-size:10.5pt'>I
hope this has been helpful, please let us know if we can be of further
assistance.<o:p></o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3DConsolas><span =
style=3D'font-size:10.5pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3DConsolas><span =
style=3D'font-size:10.5pt'>Thank
you,<o:p></o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3DConsolas><span =
style=3D'font-size:10.5pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3DConsolas><span =
style=3D'font-size:10.5pt'>Todd
Thomas<o:p></o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3DConsolas><span =
style=3D'font-size:10.5pt'>Manager,
Technical Services<o:p></o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3DConsolas><span =
style=3D'font-size:10.5pt'>Accountable
Manager, FAA Repair Station #UT3R905L Barry Controls Aerospace 4510 =
Vanowen
Burbank, CA&nbsp; 91505<o:p></o:p></span></font></p>

<div style=3D'border:none;border-bottom:solid windowtext =
1.0pt;padding:0in 0in 1.0pt 0in'>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

</div>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>FWIW,<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>Andy<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<o:p></o:p=
></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>Andy
Millin<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'>amillin at sbcglobal.net<o:p></o:p></span></font>=
</p>

<p class=3DMsoNormal><font size=3D2 face=3DCalibri><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></font></p>

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