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>Happy new year all!<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>If you are not planning on using a Lycoming IO-540 =
engine, then
you won’t need the information that follows.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>I recently had a wonderful opportunity for =
Recreation and
Education! So much Recreation and Education, that I thought I =
might just
share it with the group.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>I am using a parallel valve IO-540. It has =
come to my
attention that Lycoming makes two different types of engine mounting =
brackets
for the 540 series. This includes the K series, 300 =
HP.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>The dynafocal 1 mount uses Lycoming part number =
70456.
$369/ea. new from Lycoming. This mount has a 30 degree rake angle =
and a
mounting hole 1.380 I.D. This is the mounting bracket that =
Velocity has designed
their tubular engine mount for. Velocity also includes the Barry =
mounts
for this bracket in the kit. 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>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Dynafocal 2 uses Lycoming part number 72306. =
$473/ea. new
from Lycoming. This mount has a 20 degree rake angle and a hole =
2.000
I.D. Different size, different geometry. You can’t =
just buy
larger Barry mounts and bolt everything together.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>From what information I have found, the brackets =
were
specific to the 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.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>As there was a possibility of having the wrong =
part, my luck
held. Ha! <o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>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.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>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.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>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.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>FWIW, A.E.R.O. now makes a billet version of our =
70456 mount.
Non-PMA, experimental use only. Looks great. =
$93.75/ea.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>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???<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Another note just for general =
knowledge:<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>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:<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>-------------------------<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoPlainText>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>
<p class=3DMsoPlainText><o:p> </o:p></p>
<p class=3DMsoPlainText>Natural rubber has better tear resistance than =
butyl
rubber, but butyl rubber has a higher temperature limit than natural =
rubber.<o:p></o:p></p>
<p class=3DMsoPlainText><o:p> </o:p></p>
<p class=3DMsoPlainText>I hope this has been helpful, please let us know =
if we
can be of further assistance.<o:p></o:p></p>
<p class=3DMsoPlainText><o:p> </o:p></p>
<p class=3DMsoPlainText>Thank you,<o:p></o:p></p>
<p class=3DMsoPlainText><o:p> </o:p></p>
<p class=3DMsoPlainText>Todd Thomas<o:p></o:p></p>
<p class=3DMsoPlainText>Manager, Technical Services<o:p></o:p></p>
<p class=3DMsoPlainText>Accountable Manager, FAA Repair Station =
#UT3R905L Barry
Controls Aerospace 4510 Vanowen Burbank, CA 91505<o:p></o:p></p>
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<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>FWIW,<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Andy<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p =
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<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Andy Millin<o:p></o:p></p>
<p class=3DMsoNormal>amillin at sbcglobal.net<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
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