Today's Message Index:
----------------------
1. 11:26 AM - C4B5 missing boss mount hole (Ben Westfall)
2. 11:45 AM - Re: C4B5 missing boss mount hole (Bob Condrey)
3. 11:54 AM - Re: C4B5 missing boss mount hole (Jim Combs)
4. 11:56 AM - Re: C4B5 missing boss mount hole (Linn Walters)
5. 12:20 PM - Re: C4B5 missing boss mount hole (Ben Westfall)
6. 12:30 PM - Re: C4B5 missing boss mount hole (Rene Felker)
7. 12:32 PM - Re: C4B5 missing boss mount hole (Ben Westfall)
8. 01:06 PM - Re: C4B5 missing boss mount hole (Ben Westfall)
Message 1
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| Subject: | C4B5 missing boss mount hole |
I'm using an IO-540 C4B5 off of an Aztec that's built up as a dummy core for
now so I can do the initial cowl and baffling work. The case halves are the
actual ones that will be used on final re-assembly of the motor. The issue
I'm seeing is a missing boss mount hole for the CB-1002E fwd left support
bracket that backs the fwd left air ramp baffling. Has anyone that's used a
C4B5 ran into this? I presume the hole can be carefully located and drilled
and tapped but thought I'd ask the brain trust. See attached photos.
Ben Westfall
Message 2
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| Subject: | Re: C4B5 missing boss mount hole |
Yes, I had that on the engine of my first RV-10. My solution was to make a
replacement bracket to fit a hole outboard of what was shown in the plans.
Picture (fuzzy) attached to give you an idea of what I did. Never heard of
anybody else having this issue so I just made a replacement out of 3/4
angle and moved on. Hope this helps.
Bob
On Fri, Mar 7, 2014 at 2:25 PM, Ben Westfall <rv10@sinkrate.com> wrote:
> I=99m using an IO-540 C4B5 off of an Aztec that=99s built up
as a dummy core
> for now so I can do the initial cowl and baffling work. The case halves
> are the actual ones that will be used on final re-assembly of the motor.
> The issue I=99m seeing is a missing boss mount hole for the CB-1002
E fwd left
> support bracket that backs the fwd left air ramp baffling. Has anyone
> that=99s used a C4B5 ran into this? I presume the hole can be care
fully
> located and drilled and tapped but thought I=99d ask the brain trus
t. See
> attached photos.
>
>
> Ben Westfall
>
>
Message 3
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| Subject: | Re: C4B5 missing boss mount hole |
I also have a C4B5, also missing mounting hole and did the same thing.
It's an opportunity to make a part (Fit).
Jim Combs
On Fri, Mar 7, 2014 at 2:44 PM, Bob Condrey <condreyb@gmail.com> wrote:
> Yes, I had that on the engine of my first RV-10. My solution was to make
> a replacement bracket to fit a hole outboard of what was shown in the
> plans. Picture (fuzzy) attached to give you an idea of what I did. Never
> heard of anybody else having this issue so I just made a replacement out of
> 3/4 angle and moved on. Hope this helps.
>
> Bob
>
> On Fri, Mar 7, 2014 at 2:25 PM, Ben Westfall <rv10@sinkrate.com> wrote:
>
>> I'm using an IO-540 C4B5 off of an Aztec that's built up as a dummy
>> core for now so I can do the initial cowl and baffling work. The case
>> halves are the actual ones that will be used on final re-assembly of the
>> motor. The issue I'm seeing is a missing boss mount hole for the CB-1002E
>> fwd left support bracket that backs the fwd left air ramp baffling. Has
>> anyone that's used a C4B5 ran into this? I presume the hole can be
>> carefully located and drilled and tapped but thought I'd ask the brain
>> trust. See attached photos.
>>
>>
>>
>> Ben Westfall
>>
>>
>>
>
>
Message 4
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| Subject: | Re: C4B5 missing boss mount hole |
Bummer. My fellow RV-10 builder found a similar 'flaw' on his case. He
elected to drill/tap ..... and found the bottom of the hole isn't far
from the inside of the case!!! He'll have to seal that screw well.
However, it appears that the 'hole' in your picture is far larger than
the screw. I'd clean out the hole real good, fill the hole with JB
Weld, re-drill/tap. Use Locktite on final assembly.
Linn
IMHO, of course!!!
On 3/7/2014 2:25 PM, Ben Westfall wrote:
>
> I'm using an IO-540 C4B5 off of an Aztec that's built up as a dummy
> core for now so I can do the initial cowl and baffling work. The case
> halves are the actual ones that will be used on final re-assembly of
> the motor. The issue I'm seeing is a missing boss mount hole for the
> CB-1002E fwd left support bracket that backs the fwd left air ramp
> baffling. Has anyone that's used a C4B5 ran into this? I presume the
> hole can be carefully located and drilled and tapped but thought I'd
> ask the brain trust. See attached photos.
>
> Ben Westfall
>
>
> No virus found in this message.
> Checked by AVG - www.avg.com <http://www.avg.com>
>
Message 5
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| Subject: | C4B5 missing boss mount hole |
The hole you see to the right is not where it goes. That will be filled
similar to Bob's pic once the motor is assembled for real. It's actually in
the boss mount area to the left of the gaping hole. I assume the C4B5 had
no reason for an accessory to mount there so Lycoming did not drill and tap
that hole.
I did not think about making the smaller front hole work with a custom
bracket. I guess I sorta figured that would be used for something else and
just dismissed it. Good to know I'll likely go this route.
Thanks All!
-Ben
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Linn Walters
Sent: Friday, March 7, 2014 11:56 AM
Subject: Re: RV10-List: C4B5 missing boss mount hole
Bummer. My fellow RV-10 builder found a similar 'flaw' on his case. He
elected to drill/tap ..... and found the bottom of the hole isn't far from
the inside of the case!!! He'll have to seal that screw well. However, it
appears that the 'hole' in your picture is far larger than the screw. I'd
clean out the hole real good, fill the hole with JB Weld, re-drill/tap. Use
Locktite on final assembly.
Linn
IMHO, of course!!!
On 3/7/2014 2:25 PM, Ben Westfall wrote:
I'm using an IO-540 C4B5 off of an Aztec that's built up as a dummy core for
now so I can do the initial cowl and baffling work. The case halves are the
actual ones that will be used on final re-assembly of the motor. The issue
I'm seeing is a missing boss mount hole for the CB-1002E fwd left support
bracket that backs the fwd left air ramp baffling. Has anyone that's used a
C4B5 ran into this? I presume the hole can be carefully located and drilled
and tapped but thought I'd ask the brain trust. See attached photos.
Ben Westfall
Message 6
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| Subject: | C4B5 missing boss mount hole |
I had to do the same thing. Building is fun, I miss is sometimes. But,
flying is fun also
Rene' Felker
N423CF
801-721-6080
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Bob Condrey
Sent: Friday, March 07, 2014 12:45 PM
Subject: Re: RV10-List: C4B5 missing boss mount hole
Yes, I had that on the engine of my first RV-10. My solution was to
make a replacement bracket to fit a hole outboard of what was shown in
the plans. Picture (fuzzy) attached to give you an idea of what I did.
Never heard of anybody else having this issue so I just made a
replacement out of 3/4 angle and moved on. Hope this helps.
Bob
On Fri, Mar 7, 2014 at 2:25 PM, Ben Westfall <rv10@sinkrate.com> wrote:
I=99m using an IO-540 C4B5 off of an Aztec that=99s built up
as a dummy core for now so I can do the initial cowl and baffling work.
The case halves are the actual ones that will be used on final
re-assembly of the motor. The issue I=99m seeing is a missing
boss mount hole for the CB-1002E fwd left support bracket that backs the
fwd left air ramp baffling. Has anyone that=99s used a C4B5 ran
into this? I presume the hole can be carefully located and drilled and
tapped but thought I=99d ask the brain trust. See attached
photos.
Ben Westfall
Message 7
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| Subject: | C4B5 missing boss mount hole |
Just for the record the right side has a similar boss mount area that does
have holes drilled and tapped thus my assumption was the left side would
support it. The attached photo shows the right side for reference. I'd much
rather use the existing front hole than risk f'ing up the case that's for
sure.
Again, thanks and glad I asked. I must subconsciously love to do things the
hard way as I was pretty much resigned to drill and tap before Bob pointed
out what should have been obvious! Ah tunnel vision.
-Ben
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Linn Walters
Sent: Friday, March 7, 2014 11:56 AM
Subject: Re: RV10-List: C4B5 missing boss mount hole
Bummer. My fellow RV-10 builder found a similar 'flaw' on his case. He
elected to drill/tap ..... and found the bottom of the hole isn't far from
the inside of the case!!! He'll have to seal that screw well. However, it
appears that the 'hole' in your picture is far larger than the screw. I'd
clean out the hole real good, fill the hole with JB Weld, re-drill/tap. Use
Locktite on final assembly.
Linn
IMHO, of course!!!
On 3/7/2014 2:25 PM, Ben Westfall wrote:
I'm using an IO-540 C4B5 off of an Aztec that's built up as a dummy core for
now so I can do the initial cowl and baffling work. The case halves are the
actual ones that will be used on final re-assembly of the motor. The issue
I'm seeing is a missing boss mount hole for the CB-1002E fwd left support
bracket that backs the fwd left air ramp baffling. Has anyone that's used a
C4B5 ran into this? I presume the hole can be carefully located and drilled
and tapped but thought I'd ask the brain trust. See attached photos.
Ben Westfall
Message 8
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| Subject: | C4B5 missing boss mount hole |
For the further record=85 I checked on the reason for that =BD=94 hole
right of
the boss mount seeing that Bob=92s appeared to be plugged. That is for
a
through bolt that is just not currently installed on my =93fake=94
motor. Bob=92s
picture showed what appears as a plug bit is really the back end of a
bolt.
His case must be an older vintage where the through bolt threads into
the
case half, newer ones get a heavy nut and washer instead.
-Ben
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Linn Walters
Sent: Friday, March 7, 2014 11:56 AM
Subject: Re: RV10-List: C4B5 missing boss mount hole
Bummer. My fellow RV-10 builder found a similar 'flaw' on his case. He
elected to drill/tap ..... and found the bottom of the hole isn't far
from
the inside of the case!!! He'll have to seal that screw well. However,
it
appears that the 'hole' in your picture is far larger than the screw.
I'd
clean out the hole real good, fill the hole with JB Weld, re-drill/tap.
Use
Locktite on final assembly.
Linn
IMHO, of course!!!
On 3/7/2014 2:25 PM, Ben Westfall wrote:
I=92m using an IO-540 C4B5 off of an Aztec that=92s built up as a dummy
core for
now so I can do the initial cowl and baffling work. The case halves are
the
actual ones that will be used on final re-assembly of the motor. The
issue
I=92m seeing is a missing boss mount hole for the CB-1002E fwd left
support
bracket that backs the fwd left air ramp baffling. Has anyone that=92s
used a
C4B5 ran into this? I presume the hole can be carefully located and
drilled
and tapped but thought I=92d ask the brain trust. See attached photos.
Ben Westfall
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