Today's Message Index:
----------------------
1. 06:11 AM - Re: Trim Tab Rigging and SB Write-Up Posted (Deems Davis)
2. 11:16 AM - Re: Trim Tab Rigging and SB Write-Up Posted (gary)
3. 01:24 PM - Re: Trim Tab Rigging and SB Write-Up Posted (John Cox)
4. 01:38 PM - Re: Trim Tab Rigging and SB Write-Up Posted (Rene Felker)
5. 03:51 PM - Re: Trim Tab Rigging and SB Write-Up Posted (John Cox)
6. 04:15 PM - Re: Trim Tab Rigging and SB Write-Up Posted (Tim Olson)
7. 06:21 PM - Aileron Bellcrank Bushing Questions (Les Kearney)
8. 06:38 PM - Re: Trim Tab Rigging and SB Write-Up Posted (Rene)
9. 06:45 PM - Re: Aileron Bellcrank Bushing Questions (Tim Olson)
10. 06:56 PM - Re: Aileron Bellcrank Bushing Questions (Jesse Saint)
11. 06:58 PM - Re: Aileron Bellcrank Bushing Questions (orchidman)
12. 07:49 PM - Re: Re: Aileron Bellcrank Bushing Questions (Kelly McMullen)
13. 08:29 PM - Re: Aileron Bellcrank Bushing Questions (Marcus Cooper)
14. 08:31 PM - Re: Aileron Bellcrank Bushing Questions (Les Kearney)
15. 08:46 PM - Re: Aileron Bellcrank Bushing Questions (Tim Olson)
16. 08:46 PM - Re: Aileron Bellcrank Bushing Questions (Tim Olson)
17. 09:40 PM - Re: Aileron Bellcrank Bushing Questions (Les Kearney)
Message 1
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| Subject: | Re: Trim Tab Rigging and SB Write-Up Posted |
Tim, EXCELLENT write-up & synopsis. THANKS ! I also believe that Bill
DeRouchey deserves a lot of credit for identifying the 'potential' for
problems down the road and the likely (IMO) link between trim tab
rigging and the SB. Your write up does a very good job of tying all of
this information together. To the best of my knowledge, no one that is
flying has reported any cracks, But the pictures of the 'working rivets'
in your plane further reinforce the evidence of a twisting force in the
tail. IMO compliance with the Service Bulletin should be tied to an
examination and potential re rigging of the trim tabs.
THANKS for the service you provide this community.
Deems Davis # 406
'Its all done....Its just not put together'
http://deemsrv10.com/
>
Message 2
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| Subject: | Trim Tab Rigging and SB Write-Up Posted |
I know that I will get some flames on this, but I am not convinced that the
twisting caused by trim tab rigging is the issue. All of the other RV
series have a single trim tab on one elevator only as do many other general
aviation aircraft. Yes this does cause twisting, but not to the extent that
it should be worrisome. I suspect that there are other design issues going
on in the 10 tail and that the trim tab torque only made it show up as a
fatigue crack earlier than it normally would have if both tabs moved in
parallel.
Steady even torque is not as rough on structures as is osculating torque
such as comes from turbulence. Even the lowly beer can takes a lot of
torque but not so much bending back and forth. Additionally the bulkhead in
Van's pix looked bent to me like it was over stressed.
All I am saying is that we don't have enough info or engineering data to
make a definitive diagnosis. Many possible theories but no proof.
Gary
40274 Flying
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Olson
Sent: Saturday, June 28, 2008 2:00 PM
Subject: RV10-List: Trim Tab Rigging and SB Write-Up Posted
I finally am on the road and had my wife drive so I could finish a write
up I've had planned to show the issues with Trim Tab rigging and then a
brief summary about the Service Bulletin. I may revise it later a bit,
but here is what I have. Also, none of the other many links that I
updated are ready yet, so the only way to this page right now is by
this link:
http://www.myrv10.com/N104CD/maintenance/20080622/
Feel free to discuss. I'd like to thank Bill DeRouchey for his input in
the "twisted tail" arena. I don't know that it will be a major issue
for most people, but it definitely is worth reading the link and
checking it on your own plane. If you haven't yet done the SB, just
wait until it's all assembled.
Enjoy!
--
Tim Olson - RV-10 N104CD - Flying
Message 3
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| Subject: | Trim Tab Rigging and SB Write-Up Posted |
As Tim knows, I have discussed in detail with the former manager of the
VANS Proto-type shop the history of the build of N220RV. He was not
receptive to the possibility of workmanship as the cause. Seems N220RV
had quite a history on the removal and experimental research of multiple
tail designs directed by management. (Not unlike six attempts to get a
wing that worked on the RV-12). The histrionics of single tab and dual
tab were discussed in detail. Using the airframe for demos and the
repeated demonstration of stalls to John Q. Public had something to do
with it. The horizontal tips deflect 3" positive and negative with a
noticeable buffet.
Alex D has not had a problem, Mike Seager did not have a problem, so I
have concluded it is unique to N220RV. No one is mentioning the other
issue of the J stringers in contact with the frames and bulkheads.
I am following the respected advise I received and using a modified and
doubled two F-1010s back to back construction technique. Others should
be fine installing the SB patch and sleeping at night. Been to the
mountain, read the tablet, listened to Moses and returning to prayer.
There is history, engineering and information on this issue. It is not
available for public consumption. That is proof enough for me.
John Cox
40600 KUAO
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of gary
Sent: Sunday, June 29, 2008 11:09 AM
Subject: RE: RV10-List: Trim Tab Rigging and SB Write-Up Posted
I know that I will get some flames on this, but I am not convinced that
the
twisting caused by trim tab rigging is the issue. All of the other RV
series have a single trim tab on one elevator only as do many other
general
aviation aircraft. Yes this does cause twisting, but not to the extent
that
it should be worrisome. I suspect that there are other design issues
going
on in the 10 tail and that the trim tab torque only made it show up as a
fatigue crack earlier than it normally would have if both tabs moved in
parallel.
Steady even torque is not as rough on structures as is osculating torque
such as comes from turbulence. Even the lowly beer can takes a lot of
torque but not so much bending back and forth. Additionally the
bulkhead in
Van's pix looked bent to me like it was over stressed.
All I am saying is that we don't have enough info or engineering data to
make a definitive diagnosis. Many possible theories but no proof.
Gary
40274 Flying
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Olson
Sent: Saturday, June 28, 2008 2:00 PM
Subject: RV10-List: Trim Tab Rigging and SB Write-Up Posted
I finally am on the road and had my wife drive so I could finish a write
up I've had planned to show the issues with Trim Tab rigging and then a
brief summary about the Service Bulletin. I may revise it later a bit,
but here is what I have. Also, none of the other many links that I
updated are ready yet, so the only way to this page right now is by
this link:
http://www.myrv10.com/N104CD/maintenance/20080622/
Feel free to discuss. I'd like to thank Bill DeRouchey for his input in
the "twisted tail" arena. I don't know that it will be a major issue
for most people, but it definitely is worth reading the link and
checking it on your own plane. If you haven't yet done the SB, just
wait until it's all assembled.
Enjoy!
--
Tim Olson - RV-10 N104CD - Flying
Message 4
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| Subject: | Trim Tab Rigging and SB Write-Up Posted |
One note.....Mike Seager normally trains in N220RV, so technically he did
have a problem. When I went up for my transition training, I did it in
410RV, but Mike told me that he normally does it in N220RV but could not
because it was in the shop.......that was the end of Feb this year.
Rene' Felker
RV-10 N423CF Flying
801-721-6080
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of John Cox
Sent: Sunday, June 29, 2008 2:21 PM
Subject: RE: RV10-List: Trim Tab Rigging and SB Write-Up Posted
As Tim knows, I have discussed in detail with the former manager of the
VANS Proto-type shop the history of the build of N220RV. He was not
receptive to the possibility of workmanship as the cause. Seems N220RV
had quite a history on the removal and experimental research of multiple
tail designs directed by management. (Not unlike six attempts to get a
wing that worked on the RV-12). The histrionics of single tab and dual
tab were discussed in detail. Using the airframe for demos and the
repeated demonstration of stalls to John Q. Public had something to do
with it. The horizontal tips deflect 3" positive and negative with a
noticeable buffet.
Alex D has not had a problem, Mike Seager did not have a problem, so I
have concluded it is unique to N220RV. No one is mentioning the other
issue of the J stringers in contact with the frames and bulkheads.
I am following the respected advise I received and using a modified and
doubled two F-1010s back to back construction technique. Others should
be fine installing the SB patch and sleeping at night. Been to the
mountain, read the tablet, listened to Moses and returning to prayer.
There is history, engineering and information on this issue. It is not
available for public consumption. That is proof enough for me.
John Cox
40600 KUAO
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of gary
Sent: Sunday, June 29, 2008 11:09 AM
Subject: RE: RV10-List: Trim Tab Rigging and SB Write-Up Posted
I know that I will get some flames on this, but I am not convinced that
the
twisting caused by trim tab rigging is the issue. All of the other RV
series have a single trim tab on one elevator only as do many other
general
aviation aircraft. Yes this does cause twisting, but not to the extent
that
it should be worrisome. I suspect that there are other design issues
going
on in the 10 tail and that the trim tab torque only made it show up as a
fatigue crack earlier than it normally would have if both tabs moved in
parallel.
Steady even torque is not as rough on structures as is osculating torque
such as comes from turbulence. Even the lowly beer can takes a lot of
torque but not so much bending back and forth. Additionally the
bulkhead in
Van's pix looked bent to me like it was over stressed.
All I am saying is that we don't have enough info or engineering data to
make a definitive diagnosis. Many possible theories but no proof.
Gary
40274 Flying
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Olson
Sent: Saturday, June 28, 2008 2:00 PM
Subject: RV10-List: Trim Tab Rigging and SB Write-Up Posted
I finally am on the road and had my wife drive so I could finish a write
up I've had planned to show the issues with Trim Tab rigging and then a
brief summary about the Service Bulletin. I may revise it later a bit,
but here is what I have. Also, none of the other many links that I
updated are ready yet, so the only way to this page right now is by
this link:
http://www.myrv10.com/N104CD/maintenance/20080622/
Feel free to discuss. I'd like to thank Bill DeRouchey for his input in
the "twisted tail" arena. I don't know that it will be a major issue
for most people, but it definitely is worth reading the link and
checking it on your own plane. If you haven't yet done the SB, just
wait until it's all assembled.
Enjoy!
--
Tim Olson - RV-10 N104CD - Flying
Message 5
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| Subject: | Trim Tab Rigging and SB Write-Up Posted |
Flying the aircraft and having a problem are two entirely different
events. I was not aware that Mike had any problem other than the lack
of availability. He has been great to point out the horizontal
performance and airmanship issues which can improve safe flight.
I would love to hear more about his having a problem and think many
builders would like to know more about cause and effects on N220RV.
So far, I have not heard of any aircraft other than N220RV which an
inspection finding. It was valuable learning of the development
history.
John
do not archive
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Rene Felker
Sent: Sunday, June 29, 2008 1:36 PM
Subject: RE: RV10-List: Trim Tab Rigging and SB Write-Up Posted
One note.....Mike Seager normally trains in N220RV, so technically he
did
have a problem. When I went up for my transition training, I did it in
410RV, but Mike told me that he normally does it in N220RV but could not
because it was in the shop.......that was the end of Feb this year.
Rene' Felker
RV-10 N423CF Flying
801-721-6080
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of John Cox
Sent: Sunday, June 29, 2008 2:21 PM
Subject: RE: RV10-List: Trim Tab Rigging and SB Write-Up Posted
As Tim knows, I have discussed in detail with the former manager of the
VANS Proto-type shop the history of the build of N220RV. He was not
receptive to the possibility of workmanship as the cause. Seems N220RV
had quite a history on the removal and experimental research of multiple
tail designs directed by management. (Not unlike six attempts to get a
wing that worked on the RV-12). The histrionics of single tab and dual
tab were discussed in detail. Using the airframe for demos and the
repeated demonstration of stalls to John Q. Public had something to do
with it. The horizontal tips deflect 3" positive and negative with a
noticeable buffet.
Alex D has not had a problem, Mike Seager did not have a problem, so I
have concluded it is unique to N220RV. No one is mentioning the other
issue of the J stringers in contact with the frames and bulkheads.
I am following the respected advise I received and using a modified and
doubled two F-1010s back to back construction technique. Others should
be fine installing the SB patch and sleeping at night. Been to the
mountain, read the tablet, listened to Moses and returning to prayer.
There is history, engineering and information on this issue. It is not
available for public consumption. That is proof enough for me.
John Cox
40600 KUAO
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of gary
Sent: Sunday, June 29, 2008 11:09 AM
Subject: RE: RV10-List: Trim Tab Rigging and SB Write-Up Posted
I know that I will get some flames on this, but I am not convinced that
the
twisting caused by trim tab rigging is the issue. All of the other RV
series have a single trim tab on one elevator only as do many other
general
aviation aircraft. Yes this does cause twisting, but not to the extent
that
it should be worrisome. I suspect that there are other design issues
going
on in the 10 tail and that the trim tab torque only made it show up as a
fatigue crack earlier than it normally would have if both tabs moved in
parallel.
Steady even torque is not as rough on structures as is osculating torque
such as comes from turbulence. Even the lowly beer can takes a lot of
torque but not so much bending back and forth. Additionally the
bulkhead in
Van's pix looked bent to me like it was over stressed.
All I am saying is that we don't have enough info or engineering data to
make a definitive diagnosis. Many possible theories but no proof.
Gary
40274 Flying
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Olson
Sent: Saturday, June 28, 2008 2:00 PM
Subject: RV10-List: Trim Tab Rigging and SB Write-Up Posted
I finally am on the road and had my wife drive so I could finish a write
up I've had planned to show the issues with Trim Tab rigging and then a
brief summary about the Service Bulletin. I may revise it later a bit,
but here is what I have. Also, none of the other many links that I
updated are ready yet, so the only way to this page right now is by
this link:
http://www.myrv10.com/N104CD/maintenance/20080622/
Feel free to discuss. I'd like to thank Bill DeRouchey for his input in
the "twisted tail" arena. I don't know that it will be a major issue
for most people, but it definitely is worth reading the link and
checking it on your own plane. If you haven't yet done the SB, just
wait until it's all assembled.
Enjoy!
--
Tim Olson - RV-10 N104CD - Flying
Message 6
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| Subject: | Re: Trim Tab Rigging and SB Write-Up Posted |
Oh I totally agree that it isn't likely to be a cause.
And I agree fully regarding the fact that other planes have
a single tab too, which is why I mentioned it. I don't
think it's likely to cause many builders a problem. The thing
is though, having one tab going one way and the other going
opposite isn't at all what a person would want, so I wanted
to point out how just doing things "normally" may result in
a slight amount of this situation. I know I had it, and
I didn't see the twisting and the asymmetry. I can only
think though that the further one's tabs are off, very
quickly the forces could get higher and higher. So, it's
just plain good sense to make sure everything is rigged right.
I'm not sure what caused the cracks on that plane, but I can
easily see it being a combination of: Some big turbulence
hits, lots and lots of tail shuddering stalls, and potentially
maybe not deburring well around that notch. Hard to blame
the deburring much though, because there is definite deformation
of that bulkhead. Oh well, it happened....I'm just glad
it's stronger now.
Tim Olson - RV-10 N104CD - Flying
do not archive
gary wrote:
>
> I know that I will get some flames on this, but I am not convinced that the
> twisting caused by trim tab rigging is the issue. All of the other RV
> series have a single trim tab on one elevator only as do many other general
> aviation aircraft. Yes this does cause twisting, but not to the extent that
> it should be worrisome. I suspect that there are other design issues going
> on in the 10 tail and that the trim tab torque only made it show up as a
> fatigue crack earlier than it normally would have if both tabs moved in
> parallel.
>
> Steady even torque is not as rough on structures as is osculating torque
> such as comes from turbulence. Even the lowly beer can takes a lot of
> torque but not so much bending back and forth. Additionally the bulkhead in
> Van's pix looked bent to me like it was over stressed.
>
> All I am saying is that we don't have enough info or engineering data to
> make a definitive diagnosis. Many possible theories but no proof.
>
> Gary
> 40274 Flying
>
> -----Original Message-----
> From: owner-rv10-list-server@matronics.com
> [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Olson
> Sent: Saturday, June 28, 2008 2:00 PM
> To: rv10-list@matronics.com
> Subject: RV10-List: Trim Tab Rigging and SB Write-Up Posted
>
>
> I finally am on the road and had my wife drive so I could finish a write
> up I've had planned to show the issues with Trim Tab rigging and then a
> brief summary about the Service Bulletin. I may revise it later a bit,
> but here is what I have. Also, none of the other many links that I
> updated are ready yet, so the only way to this page right now is by
> this link:
> http://www.myrv10.com/N104CD/maintenance/20080622/
>
> Feel free to discuss. I'd like to thank Bill DeRouchey for his input in
> the "twisted tail" arena. I don't know that it will be a major issue
> for most people, but it definitely is worth reading the link and
> checking it on your own plane. If you haven't yet done the SB, just
> wait until it's all assembled.
>
> Enjoy!
>
Message 7
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| Subject: | Aileron Bellcrank Bushing Questions |
Hi
I was working on my wings today and tripped over a couple of small issues.
When filing the bellcrank bushings down to the required length, I made them
slightly undersize (2.745" rather than 2.750"). Is this going to be an issue
given that I am required to file the bellcrank tube to ensure at least 1/32
- 1/16" of the bushing is exposed?
As well, I need to ream the bushings so that an AN4 bolt will fit inside.
Reaming is new to me so I would like a little guidance as to how to ream
these bushings. What do I use to ream them?
Inquiring minds need to know
Les Kearney
#40643
Message 8
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| Subject: | Trim Tab Rigging and SB Write-Up Posted |
Now that I am not at work and have a couple of minutes......before the kids
come and attack me....
As I reported here, I had a heavy left wing during my initial flight
testing, and in the end I attributed it to three things.
1. Me being to fat and not giving enough credit to that fact. I have since
always burned the left tank down when I am the sole occupant. That was the
easy one.
2. Flap rigging, my right flap was 1 degree lower than the left flap. It
was do to a little interference between the inside edge of the flap and the
fuselage. I was able to file down the flap a little, getting a better fit
and got the rigging right. I also re-rigged the ailerons, but it was very
minor. After that I felt I still had a heavy left wing. Trim handled it,
but I felt I was using to much trim and I could see the ailerons were not in
trail in level flight.
3. The last thing I did was re-rigged the elevator trim. When I first
flew, I felt I was using way to much nose down trim after takeoff and in
cruise flight. After to talking to some other flyers, I felt that may be
more normal. I walked through the rigging procedure several times and was
not happy with the way the left trim moved......so I tried to fix that. At
about a degree at a time I changed the starting position from 35 down to 34
down and so on. Did a test flight each time, trying to determine if I was
changing anything. Handling stayed the same. In the end, if I remember
correctly, I ended up a little under 33 degrees. With that, the left comes
up and then goes back in trail as I go to full nose down.
Now after doing all that, I do not notice the heavy left wing.....and I am
still fat, so at least I kept one variable constant.
Tomorrow is my first real cross country, me and my wife are headed to Vegas
for a couple of days to met up with my Brother and friends. It will be the
first test where I have not had something else to do except pay attention to
the plane.
Rene'
801-721-6080
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Olson
Sent: Sunday, June 29, 2008 5:13 PM
Subject: Re: RV10-List: Trim Tab Rigging and SB Write-Up Posted
Oh I totally agree that it isn't likely to be a cause.
And I agree fully regarding the fact that other planes have
a single tab too, which is why I mentioned it. I don't
think it's likely to cause many builders a problem. The thing
is though, having one tab going one way and the other going
opposite isn't at all what a person would want, so I wanted
to point out how just doing things "normally" may result in
a slight amount of this situation. I know I had it, and
I didn't see the twisting and the asymmetry. I can only
think though that the further one's tabs are off, very
quickly the forces could get higher and higher. So, it's
just plain good sense to make sure everything is rigged right.
I'm not sure what caused the cracks on that plane, but I can
easily see it being a combination of: Some big turbulence
hits, lots and lots of tail shuddering stalls, and potentially
maybe not deburring well around that notch. Hard to blame
the deburring much though, because there is definite deformation
of that bulkhead. Oh well, it happened....I'm just glad
it's stronger now.
Tim Olson - RV-10 N104CD - Flying
do not archive
gary wrote:
>
> I know that I will get some flames on this, but I am not convinced that
the
> twisting caused by trim tab rigging is the issue. All of the other RV
> series have a single trim tab on one elevator only as do many other
general
> aviation aircraft. Yes this does cause twisting, but not to the extent
that
> it should be worrisome. I suspect that there are other design issues
going
> on in the 10 tail and that the trim tab torque only made it show up as a
> fatigue crack earlier than it normally would have if both tabs moved in
> parallel.
>
> Steady even torque is not as rough on structures as is osculating torque
> such as comes from turbulence. Even the lowly beer can takes a lot of
> torque but not so much bending back and forth. Additionally the bulkhead
in
> Van's pix looked bent to me like it was over stressed.
>
> All I am saying is that we don't have enough info or engineering data to
> make a definitive diagnosis. Many possible theories but no proof.
>
> Gary
> 40274 Flying
>
> -----Original Message-----
> From: owner-rv10-list-server@matronics.com
> [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Olson
> Sent: Saturday, June 28, 2008 2:00 PM
> To: rv10-list@matronics.com
> Subject: RV10-List: Trim Tab Rigging and SB Write-Up Posted
>
>
> I finally am on the road and had my wife drive so I could finish a write
> up I've had planned to show the issues with Trim Tab rigging and then a
> brief summary about the Service Bulletin. I may revise it later a bit,
> but here is what I have. Also, none of the other many links that I
> updated are ready yet, so the only way to this page right now is by
> this link:
> http://www.myrv10.com/N104CD/maintenance/20080622/
>
> Feel free to discuss. I'd like to thank Bill DeRouchey for his input in
> the "twisted tail" arena. I don't know that it will be a major issue
> for most people, but it definitely is worth reading the link and
> checking it on your own plane. If you haven't yet done the SB, just
> wait until it's all assembled.
>
> Enjoy!
>
Message 9
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| Subject: | Re: Aileron Bellcrank Bushing Questions |
Les Kearney wrote:
> Hi
>
>
>
> I was working on my wings today and tripped over a couple of small issues.
>
>
>
> When filing the bellcrank bushings down to the required length, I made
> them slightly undersize (2.745 rather than 2.750). Is this going to be
> an issue given that I am required to file the bellcrank tube to ensure
> at least 1/32 1/16 of the bushing is exposed?
Probably not an issue.
>
> As well, I need to ream the bushings so that an AN4 bolt will fit
> inside. Reaming is new to me so I would like a little guidance as to how
> to ream these bushings. What do I use to ream them?
>
>
You should use a reamer. Just check out a local machine tool
place...they can sell you reamers. Just turn them like a drill
bit only slower as it goes through. Makes a nice clean hole.
Tim Olson - RV-10 N104CD - Flying
do not archive
>
> Inquiring minds need to know
>
>
>
> Les Kearney
>
> #40643
Message 10
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| Subject: | Re: Aileron Bellcrank Bushing Questions |
I can't answer the first question, but the easiest way, by far, to
ream the bushing is to track down a lathe and chuck up the bushing and
run a 1/4" reamer through it. That way it is perfectly centered and
controlled the whole way. I don't understand why Van's doesn't do
this for us, since it is one of those steps that seems like it would
be much easier to have them do than to have us find a lathe.
do not archive
Jesse Saint
Saint Aviation, Inc.
jesse@saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694
On Jun 29, 2008, at 9:17 PM, Les Kearney wrote:
> Hi
>
> I was working on my wings today and tripped over a couple of small
> issues.
>
> When filing the bellcrank bushings down to the required length, I
> made them slightly undersize (2.745=94 rather than 2.750=94). Is this
> going to be an issue given that I am required to file the bellcrank
> tube to ensure at least 1/32 ' 1/16=94 of the bushing is exposed?
>
> As well, I need to ream the bushings so that an AN4 bolt will fit
> inside. Reaming is new to me so I would like a little guidance as to
> how to ream these bushings. What do I use to ream them?
>
> Inquiring minds need to know
>
> Les Kearney
> #40643
>
>
Message 11
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| Subject: | Re: Aileron Bellcrank Bushing Questions |
In my opinion, reamers are an essential tool. I have all but worn out a #40 and
a #30 reamer. All my match drilling was done with one of these.
To find out a little more about reamers, go to page 34 of the avery tools catalog.
http://www.averytools.com/catalog/2008%20catalog%20B.qxd.pdf
then scrole down to page 34. There is some good information about reamers and
how to use them. Since our skins are so thin, I never used any lubricant. If
I were reaming anything thicker then the diameter of the reamer, then I sure
would use a lubricant.
Off the top of my head, I don't remember what I used for the bellcrank but since
I don't have a 1/4" reamer, it must have been a sharp 1/4 drill.
--------
Gary Blankenbiller
RV10 - # 40674
Instrument Panel, Fiberglass - SB
(N2GB registered)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=190485#190485
Message 12
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| Subject: | Re: Aileron Bellcrank Bushing Questions |
Do you use the reamers in your air drill, or in a slower speed
cordless drill? Any thoughts as to whether it matters?
On Sun, Jun 29, 2008 at 6:56 PM, orchidman <gary@wingscc.com> wrote:
>
> In my opinion, reamers are an essential tool. I have all but worn out a #40
and a #30 reamer. All my match drilling was done with one of these.
> To find out a little more about reamers, go to page 34 of the avery tools catalog.
> http://www.averytools.com/catalog/2008%20catalog%20B.qxd.pdf
> then scrole down to page 34. There is some good information about reamers and
how to use them. Since our skins are so thin, I never used any lubricant.
If I were reaming anything thicker then the diameter of the reamer, then I sure
would use a lubricant.
>
> Off the top of my head, I don't remember what I used for the bellcrank but since
I don't have a 1/4" reamer, it must have been a sharp 1/4 drill.
>
> --------
> Gary Blankenbiller
> RV10 - # 40674
> Instrument Panel, Fiberglass - SB
> (N2GB registered)
Message 13
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| Subject: | Aileron Bellcrank Bushing Questions |
Les,
Lots of good answers on the reaming question, but I have a thought for
the length of the bushing. The exact number is not as much an issue as
ensuring the bushing is slightly longer than the bellcrank. Otherwise when
you tighten the bolt you'll add drag to the movement of the bellcrank.
Marcus
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Les Kearney
Sent: Sunday, June 29, 2008 8:18 PM
Subject: RV10-List: Aileron Bellcrank Bushing Questions
Hi
I was working on my wings today and tripped over a couple of small issues.
When filing the bellcrank bushings down to the required length, I made them
slightly undersize (2.745" rather than 2.750"). Is this going to be an issue
given that I am required to file the bellcrank tube to ensure at least 1/32
- 1/16" of the bushing is exposed?
As well, I need to ream the bushings so that an AN4 bolt will fit inside.
Reaming is new to me so I would like a little guidance as to how to ream
these bushings. What do I use to ream them?
Inquiring minds need to know
Les Kearney
#40643
Message 14
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| Subject: | Aileron Bellcrank Bushing Questions |
Thanks Ben and others.
I now have a pretty good idea of what I should do ' as much as I would
like
to buy a lathe, it does seem bit overkill for a couple of bushings.
I=92ll see
if I can track down a sharp =BC=94 drill bit that will be long enough or
perhaps
a reamer.
Cheers
Les
_____
From: Ben Westfall [mailto:ben@sinkrate.com]
Sent: June-29-08 9:15 PM
Subject: RE: RV10-List: Aileron Bellcrank Bushing Questions
Les,
I cannot send to the list because the matronics server doesn=92t like my
mailserver right now. I had a compromised mail account that sent some
spam
for a couple of days. Should be cleared up tomorrow but until then
I=92ll
have to try sending this directly to you.
I used a really sharp, high quality .250=94 aircraft drill bit with lots
of
bolube (cause I had this in my stash otherwise I would have ordered a
reamer). I did the aileron bellcrank ones chucked up in a vise secured
to
the table on the drill press. There are similar bushings in the control
stick bases. For these I used the same method except I used an electric
hand drill=85 no drill press. The bit follows the hole quite nicely.
The
brass is so soft that it=92s pretty easily done w/o a reamer or a lathe.
There is no slop in any of my bushings from what I can tell but I have
not
yet flown.
I did screw up the first attempt because I forced the bit to much and it
did
not center. They are cheap ($3 a pair I think) and Van=92s is close so
for me
not an issue. With a nice sharp bit its pretty easy to do them by hand.
-Ben
_____
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Les Kearney
Sent: Sunday, June 29, 2008 6:18 PM
Subject: RV10-List: Aileron Bellcrank Bushing Questions
Hi
I was working on my wings today and tripped over a couple of small
issues.
When filing the bellcrank bushings down to the required length, I made
them
slightly undersize (2.745=94 rather than 2.750=94). Is this going to be
an issue
given that I am required to file the bellcrank tube to ensure at least
1/32
' 1/16=94 of the bushing is exposed?
As well, I need to ream the bushings so that an AN4 bolt will fit
inside.
Reaming is new to me so I would like a little guidance as to how to ream
these bushings. What do I use to ream them?
Inquiring minds need to know
Les Kearney
#40643
Message 15
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| Subject: | Re: Aileron Bellcrank Bushing Questions |
A reamer will work just fine in a drill. It definitely does a
smoother hole than a drill bit.
Tim Olson - RV-10 N104CD - Flying
do not archive
Les Kearney wrote:
> Thanks Ben and others.
>
>
>
> I now have a pretty good idea of what I should do as much as I would
> like to buy a lathe, it does seem bit overkill for a couple of bushings.
> Ill see if I can track down a sharp drill bit that will be long
> enough or perhaps a reamer.
>
>
>
> Cheers
>
>
>
> Les
>
>
Message 16
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| Subject: | Re: Aileron Bellcrank Bushing Questions |
A reamer will work just fine in a drill. It definitely does a
smoother hole than a drill bit...and they're not expensive at all.
Tim Olson - RV-10 N104CD - Flying
do not archive
Les Kearney wrote:
> Thanks Ben and others.
>
>
>
> I now have a pretty good idea of what I should do as much as I would
> like to buy a lathe, it does seem bit overkill for a couple of bushings.
> Ill see if I can track down a sharp drill bit that will be long
> enough or perhaps a reamer.
>
>
>
> Cheers
>
>
>
> Les
>
>
Message 17
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|
| Subject: | Aileron Bellcrank Bushing Questions |
Thanks Ben and others.
I now have a pretty good idea of what I should do ' as much as I would
like
to buy a lathe, it does seem bit overkill for a couple of bushings.
I=92ll see
if I can track down a sharp =BC=94 drill bit that will be long enough or
perhaps
a reamer.
Cheers
Les
_____
From: Ben Westfall [mailto:ben@sinkrate.com]
Sent: June-29-08 9:15 PM
Subject: RE: RV10-List: Aileron Bellcrank Bushing Questions
Les,
I cannot send to the list because the matronics server doesn=92t like my
mailserver right now. I had a compromised mail account that sent some
spam
for a couple of days. Should be cleared up tomorrow but until then
I=92ll
have to try sending this directly to you.
I used a really sharp, high quality .250=94 aircraft drill bit with lots
of
bolube (cause I had this in my stash otherwise I would have ordered a
reamer). I did the aileron bellcrank ones chucked up in a vise secured
to
the table on the drill press. There are similar bushings in the control
stick bases. For these I used the same method except I used an electric
hand drill=85 no drill press. The bit follows the hole quite nicely.
The
brass is so soft that it=92s pretty easily done w/o a reamer or a lathe.
There is no slop in any of my bushings from what I can tell but I have
not
yet flown.
I did screw up the first attempt because I forced the bit to much and it
did
not center. They are cheap ($3 a pair I think) and Van=92s is close so
for me
not an issue. With a nice sharp bit its pretty easy to do them by hand.
-Ben
_____
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Les Kearney
Sent: Sunday, June 29, 2008 6:18 PM
Subject: RV10-List: Aileron Bellcrank Bushing Questions
Hi
I was working on my wings today and tripped over a couple of small
issues.
When filing the bellcrank bushings down to the required length, I made
them
slightly undersize (2.745=94 rather than 2.750=94). Is this going to be
an issue
given that I am required to file the bellcrank tube to ensure at least
1/32
' 1/16=94 of the bushing is exposed?
As well, I need to ream the bushings so that an AN4 bolt will fit
inside.
Reaming is new to me so I would like a little guidance as to how to ream
these bushings. What do I use to ream them?
Inquiring minds need to know
Les Kearney
#40643
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