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Continental IO- 240 engine mount bushings

 
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bakerocb



Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

PostPosted: Sun Jan 21, 2018 1:16 pm    Post subject: Continental IO- 240 engine mount bushings Reply with quote

1/21/2018

Hello Bruce, Please forgive my slow response. Like granpaw used to say: “It is hell to be old and sick and poor all at the same time.” And that is me, struggling to get through the last bit of pancreatic cancer surgery and chemo fusion treatment.

You wrote: “I am currently where you were then on my Series 5 Kitfox and wonder if you ever found a viable solution with your hose experiments from Mcmaster carr?”

The answer is yes, I am very satisfied with the hose modifications that I came up with from McMaster Carr. What I propose to do is search back through the KIS TR-1 compost heap on my computer and forward to you what I think might be helpful. You can stop me at any time and ask any questions at any time. Might even include a picture or two. I’ll include the KIS Matronics group in case someone else is facing the same problem.

For those not familiar with the problem please see the attached IMG_0259(2).jpg. This what the Continental Motors provided bushings will sag into eventually.

OC

703-425-4670

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

From: BRUCE LINA (airlina(at)verizon.net)
Sent: Saturday, January 20, 2018 8:26 PM
To: bakerocb(at)cox.net (bakerocb(at)cox.net)
Subject: Continental IO- 240 engine mount bushings


Saw your post from 2015 on the Matronics forum concerning your search for a cheaper solution to the TCM 638225 ridiculously expensive center bushings. I am currently where you were then on my Series 5 Kitfox and wonder if you ever found a viable solution with your hose experiments from Mcmaster carr? any input you can provide a fellow aviator/builder would be appreciated. Thanks Bruce Lina N199CL


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bakerocb



Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

PostPosted: Sun Jan 21, 2018 2:00 pm    Post subject: Continental IO- 240 engine mount bushings Reply with quote

1/21/2018

Hello Again Bruce Lina, As promised I have searched though the past correspondence on this subject and have the following extracted information for you:


You could make and install your own substitute 638225 bushings as I have
done described here:

I decided that the hose 86805K53 from McMaster-Carr was the most suitable of
the four different hose samples that I had.

http://www.mcmaster.com/#catalog/121/3569/=yyg3wt

From the two six inch long pieces that I had received I made a total of six
substitute 6838225 bushings. I cut the hose into lengths about 1 3/4 inches
long using my chop saw (nice square ends). Then I reamed out the center
holes of the six pieces of hose in stages to an inside diameter of 1/2 inch
using my drill press to permit entry of the metal spacer part number 653695.

Then I mounted the bushing on a 1/2 inch diameter bolt about six inches long so that I could
hold the bushing and rotate it against my disc sander to create a taper on
each end. I finished off each tapered end by chucking the bolt in the drill
press and holding a sanding block against the tapered end while the bolt was
rotating.

See the attached picture of the results. Mine on the left, Continental’s on the right.**

My home made version has a Durometer of 75A which is harder than the 30-40
rating of the CM provided bushing.
I have flown my plane with four of my substitute bushings installed and if
there is any increased vibration because
of the greater hardness of the substitute bushings it is undetectable.

My total cost for the two six inch pieces of 86805K53 tube, which yielded a
total of six bushings, was
$13.44 USD plus shipping.

Please let me know how you decide to solve your engine mounting problem an if you have any further questions. Thanks.

OC

**PS: The other attached picture is of the Baker Aircraft Factory that I hired a contractor to build attached to my house. Sadly it appears that my KIS TR-1 will be the only aircraft that will be built in that factory as age has crept up on me.

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

From: BRUCE LINA (airlina(at)verizon.net)
Sent: Saturday, January 20, 2018 8:26 PM
To: bakerocb(at)cox.net (bakerocb(at)cox.net)
Subject: Continental IO- 240 engine mount bushings


Saw your post from 2015 on the Matronics forum concerning your search for a cheaper solution to the TCM 638225 ridiculously expensive center bushings. I am currently where you were then on my Series 5 Kitfox and wonder if you ever found a viable solution with your hose experiments from Mcmaster carr? any input you can provide a fellow aviator/builder would be appreciated. Thanks Bruce Lina N199CL


- The Matronics KIS-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?KIS-List



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PostPosted: Sun Jan 21, 2018 2:10 pm    Post subject: Continental IO- 240 engine mount bushings Reply with quote

Have you tried rotating them at every annual (before they sag too much)?

--------------------------------------------
On Sun, 1/21/18, OC <bakerocb(at)cox.net> wrote:

Subject: Re: Continental IO- 240 engine mount bushings
To: "BRUCE LINA" <airlina(at)verizon.net>, "KIS-LIST MATRONICS" <kis-list(at)matronics.com>
Date: Sunday, January 21, 2018, 4:15 PM





1/21/2018
 
Hello Bruce, Please forgive my slow response. Like
granpaw used to say: “It
is hell to be old and sick and poor all at the same time.”
And that is me,
struggling to get through the last bit of pancreatic cancer
surgery and chemo
fusion treatment.
 
You wrote: “I am currently where you were then on my
Series 5 Kitfox and
wonder if you ever found a viable solution with your hose
experiments from
Mcmaster carr?”
 
The answer is yes, I am very satisfied with the hose
modifications that I
came up with from McMaster Carr. What I propose to do is
search back through
the  KIS TR-1 compost heap on my computer and forward
to you what I think
might be helpful. You can stop me at any time and ask any
questions at any time.
Might even include a picture  or two. I’ll include
the KIS Matronics group
in case someone else is facing the same problem.
 
For those not familiar with the problem please see the
attached
IMG_0259(2).jpg. This what the Continental Motors provided
bushings will sag
into eventually.
 
OC
 
703-425-4670
 
============================================


 

From:
BRUCE
LINA
Sent:
Saturday, January 20, 2018
8:26 PM
To:
bakerocb(at)cox.net
Subject:
Continental IO- 240 engine
mount bushings
 

Saw your post from 2015 on the Matronics
forum concerning
your search for a cheaper solution to the TCM 638225
ridiculously expensive
center bushings. I am currently where you were then on my
Series 5 Kitfox and
wonder if you ever found a viable solution with your hose
experiments from
Mcmaster carr? any input you can provide a fellow
aviator/builder would be
appreciated. Thanks Bruce Lina N199CL

 


- The Matronics KIS-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?KIS-List
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