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  #181  
Old 04-21-2021, 04:03 PM
wirejock's Avatar
wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 4,661
Default Mixture bellcrank

Here's another small Gotcha. Photo=1,000 words
The C-670 Bushing is pressed into VA-165 Mixture Bellcrank.
When the bellcrank is bolted to VA-164 Mixture Bracket, it doesn't freely rotate unless the bolt is left loose enough so it rotates. The result is friction against the flanges. Not correct in my mind.
The bushing should be captured by the bolt between the flanges so the bellcrank can rotate freely on the bushing.
Maybe not the correct fix, but I drove out the bushing. Then the Mixture Bellcrank was reamed to 3/8" and polished. A tiny bit was removed from each side of the bellcrank so the bushing was a few thou wider. A bit of Lubriplate applied. Slip the parts back together. Now when the bolt is tightened, the bellcrank rotates either way freely.
Yes, I scratched it a little. I have touch up paint.

Edit...
Ditch the Vans bushing. Every time I reassembled and tightened the bolt, the bushing swelled and the bellcrank froze up. Go to the local hardware store aviation department and but a steel spacer bushing. I got one 1/4" ID X 3/8" OD and almost exactly the right length for less than $2. A little sanding and polishing and the bolt can be torqued to spec. Bellcrank rotates like butta!
Click image for larger version

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Larry Larson
Estes Park, CO
wirejock at yahoo dot com
Donated 01/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
Empennage, wings, fuse, finishing kit, now FWF
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.

Last edited by wirejock : 04-22-2021 at 04:34 PM.
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  #182  
Old 04-21-2021, 04:15 PM
riseric's Avatar
riseric riseric is offline
 
Join Date: Oct 2011
Location: Québec, CNV9
Posts: 456
Default It won't show when flying...

Quote:
Originally Posted by wirejock View Post
Yes, I scratched it a little. I have touch up paint.
Attachment 10659
Good catch Larry!!!
Don't worry about the scratches, how many times do I have to remind myself that I'm not building a 35000$ Swiss Watch...
...wait a minute... my project will cost way more...
It won't show at cruise speed and altitude...
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Eric,
2021 dues happily donated
RV-8 slow built #83274
Grove Airfoiled Gear, Wheels & Brakes
VPX-Pro, EFII System 32, EarthX batteries
Aerosport IO-375, MTV-9-B/183
Skyview HDX
C-GEMQ
Final inspection done!! Waiting for CofA
C-72R Cutlass, flying
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  #183  
Old 04-21-2021, 04:53 PM
wirejock's Avatar
wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 4,661
Default Scratches

Quote:
Originally Posted by riseric View Post
Good catch Larry!!!
Don't worry about the scratches, how many times do I have to remind myself that I'm not building a 35000$ Swiss Watch...
...wait a minute... my project will cost way more...
It won't show at cruise speed and altitude...
Doesn't bother me. That's for the builders that always comment about stuff that doesn't matter just to point out the mistake. Figured I would save them the effort.
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Larry Larson
Estes Park, CO
wirejock at yahoo dot com
Donated 01/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
Empennage, wings, fuse, finishing kit, now FWF
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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  #184  
Old 04-30-2021, 08:55 AM
motodave motodave is offline
 
Join Date: Dec 2018
Location: Littleton, CO
Posts: 95
Default

Quick question, I'm also using a VPX will not be using the Garmin supplied shunt on the B lead... wonder what I want to measure with it? Thinking battery state charge / discharge, ideas? Single B&C 60a in my case.
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RV7 Slider N732DH reserved
I(O)360-M1B Thunderbolt
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Wiring 40% done
Was QB wings now will be slow build...
Littleton, CO
Photo log: https://flic.kr/ps/9jjZz
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  #185  
Old 06-16-2021, 08:58 AM
motodave motodave is offline
 
Join Date: Dec 2018
Location: Littleton, CO
Posts: 95
Default

Looks like I get to move my throttle cable mount over... installed per Van's with stock exhaust on I(O)360-M1B...

Untitled by Dave Hock, on Flickr

Untitled by Dave Hock, on Flickr

This is too close and can't really even get the heat shield in place. I will attempt to flip the bracket over as others have done.
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Dave
RV7 Slider N732DH reserved
I(O)360-M1B Thunderbolt
Empennage 100% Complete
Slow build Fuselage 95% done
Wiring 40% done
Was QB wings now will be slow build...
Littleton, CO
Photo log: https://flic.kr/ps/9jjZz

Last edited by motodave : 06-16-2021 at 09:36 AM. Reason: additional pic
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  #186  
Old 06-16-2021, 02:43 PM
RV74ME RV74ME is offline
 
Join Date: Dec 2015
Location: Auburn, AL
Posts: 232
Default

Quote:
Originally Posted by motodave View Post
Looks like I get to move my throttle cable mount over... installed per Van's with stock exhaust on I(O)360-M1B...

Untitled by Dave Hock, on Flickr

Untitled by Dave Hock, on Flickr

This is too close and can't really even get the heat shield in place. I will attempt to flip the bracket over as others have done.
Something else to keep an eye on Dave is the two exhaust pipes where they cross underneath. Both mine and another -7 had made contact with one another and actually rubbed an oval shaped area. One of them rubbed all the way through and actually had a pin sized hole. Sent back to vetterman who took care of it.
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  #187  
Old 06-16-2021, 05:16 PM
motodave motodave is offline
 
Join Date: Dec 2018
Location: Littleton, CO
Posts: 95
Default

Thanks for the tip Steve
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Dave
RV7 Slider N732DH reserved
I(O)360-M1B Thunderbolt
Empennage 100% Complete
Slow build Fuselage 95% done
Wiring 40% done
Was QB wings now will be slow build...
Littleton, CO
Photo log: https://flic.kr/ps/9jjZz
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  #188  
Old 06-17-2021, 05:13 AM
Iluke Iluke is offline
 
Join Date: Jun 2011
Location: Hope Valley, Rhode Island
Posts: 167
Default

Dave-
I had a similar problem and made a new bracket o replace the one Vans sent. The new one elevated the came up closer to the sump. You can see in your pictures there is some space available above the cable now. I used that to give me more room off the exhaust.

I made the new bracket first as a template out of 032 aluminum in order to get my dimensions right (took 2-3 trys), then ordered some 4130 (I believe I used .062) and mad it from that.

I don't seem to have any clear pictures of it on hand but I will be at the airport this weekend and will take some if you like.

-Ivan
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Hope Valley, RI
RV-7 SB
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  #189  
Old 06-17-2021, 09:07 AM
wirejock's Avatar
wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 4,661
Default Bracket

Quote:
Originally Posted by Iluke View Post
Dave-
I had a similar problem and made a new bracket o replace the one Vans sent. The new one elevated the came up closer to the sump. You can see in your pictures there is some space available above the cable now. I used that to give me more room off the exhaust.

I made the new bracket first as a template out of 032 aluminum in order to get my dimensions right (took 2-3 trys), then ordered some 4130 (I believe I used .062) and mad it from that.

I don't seem to have any clear pictures of it on hand but I will be at the airport this weekend and will take some if you like.

-Ivan
I would love to see photos! Same problem.
__________________
Larry Larson
Estes Park, CO
wirejock at yahoo dot com
Donated 01/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
Empennage, wings, fuse, finishing kit, now FWF
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
Reply With Quote
  #190  
Old 06-17-2021, 09:48 AM
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bjdecker bjdecker is offline
 
Join Date: Jun 2005
Location: Georgetown, TX
Posts: 870
Default

Quote:
Originally Posted by wirejock View Post
I would love to see photos! Same problem.
Yup - same problem on my IO-360-A1B6; I also didn't like the angle/routing of the cable.

I did the same thing as prior poster -- make a new bracket out of 18ga 4130 plate. Move the cable hole over closer to the screw bosses and closer to the sump.
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