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v/r,dr
VAF POSTS & RV NEWS THAT CAUGHT MY EYE.....dr:
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vansairforce.net
Multiple Zip Tie Materials …examples from Dave_MT
it's not like we are building a Space Shuttle. Dassault uses all three methods. Adel clamps, lacing and zip ties. I can find out what the zip ties mounts are made of. This is in the nose cone.
vansairforce.net
BHhester’s Filter Box Blog Entries ….good stuff
I had to reinforce my filter box back in 2014, it’s still holding up good. Details on my site
vansairforce.net
Mag Manufacturing Issue PIREP …Scott
Is the silver colored metal piece loose on the plastic rotor?
We discovered a Manufacturing issue with this part quite a few years ago at vans and actually started a investigation after writing a service difficulty report because we found multiple bad ones.
This occurred right about the time that champion took over the slick, magneto business.
For a while, champion was actually exchanging new parts for ones that were found to have the conductor loose. We got at least two new ones on exchange that had the exact same problem new out of the box.
This is something that should be looked at very closely at every magneto inspection.
vansairforce.net
Guide Wear …dtw_rv6
I am experiencing symptoms consistent with a stuck exhaust valve, so I pulled the rocker cover and disassembled the exhaust valve for some borescope images. It shook so bad when it manifested in flight, I'm grounded until I figure out what this is. I did determine that the problem would slowly clear up at reduced throttle. It was only at WOT when the cylinder cut out.
When I pulled the valve stem out through the spark plug hole, it was very shiny and smooth. It also slid very easily in and out of the guide before I disassembled it. What is concerning to me, is the photos I have of the valve guide. It looks like a severe taper on the combustion side of the bore - I've never seen one before, so I'm not sure if this is normal.
I didn't do a wobble measurement, but I didn't feel anything excessive when I subjectively compared it to cylinder #2.
Superior XPIO-360, 1100hrs TT. Pmag/Lightspeed ignitions. 8.5:1 cylinders.
Is it time to pull the jug?
vansairforce.net
Panel Porn …Dbro172
https://vansairforce.net/threads/show-us-your-panel.12863/page-4#post-1758705
Tool DIY Porn …Dan 57 PIREP
Had some 6061-T6 in my "trash" box, and used that to manufacture said plate... I'm happy to report that despite being only 15/64" (6 mm) thick aluminum, it held pretty good and did not bend any when I did my 400H wobble inspection today.
PS
All good, but for cylinder #2 having barely any play, so the valve was dropped into the cylinder, its stem cleaned from the black gum, and some miraculous fishing performed to reinstall the valve. Ah yeah, and also having fun chasing the wandering keepers.
OFF TOPIC:
PS: Older issues of the ‘VAF News’ can be found at:
www.vansairforce.net
v/r,dr
VAF POSTS & RV NEWS THAT CAUGHT MY EYE.....dr:
—————————————————————————
Smiley faces on AN470 rivets, should I replace?
Hopefully I can get some feedback on how I can improve setting AN470 rivets with an offset rivet set. The rivets are AN470AD4-7, between the wing ribs and the main spar, RV-8. I was originally suspecting I had the wrong tool for the job, but it looks ok. Currently using a MM135-17 1/8 AN470...
vansairforce.net
Multiple Zip Tie Materials …examples from Dave_MT
it's not like we are building a Space Shuttle. Dassault uses all three methods. Adel clamps, lacing and zip ties. I can find out what the zip ties mounts are made of. This is in the nose cone.
Is Using Zip Ties Safe?
No one questions that, or the appropriateness of using zip ties in high end aerospace applications. But zip ties used in commercial aerospace are qualitatively different than typical cheap HF/Amazon/Big Box Store zip ties that are commonly used by homebuilders. That is the important point to...
vansairforce.net
BHhester’s Filter Box Blog Entries ….good stuff
I had to reinforce my filter box back in 2014, it’s still holding up good. Details on my site
My air filter wore thru my airbox
For the second time in almost 20 years the K&N air filter in my -4 has worn thru the fiberglass bottom. The first time this occurred, I replaced the airbox assembly and repaired the old one to keep as a spare. The spare will now be pressed into service while I repair this one. Has anyone...
vansairforce.net
Mag Manufacturing Issue PIREP …Scott
Is the silver colored metal piece loose on the plastic rotor?
We discovered a Manufacturing issue with this part quite a few years ago at vans and actually started a investigation after writing a service difficulty report because we found multiple bad ones.
This occurred right about the time that champion took over the slick, magneto business.
For a while, champion was actually exchanging new parts for ones that were found to have the conductor loose. We got at least two new ones on exchange that had the exact same problem new out of the box.
This is something that should be looked at very closely at every magneto inspection.
Issues
I flew the -10 today and on the first startup cold, I got a kick back. That’s a first. I have one slick impulse mag and one SureFly sim on my carb’d O-540. On the second start after a 30 minute refueling stop, I had a major exhaust backfire. Again never had one before. I am thinking since...
vansairforce.net
Guide Wear …dtw_rv6
I am experiencing symptoms consistent with a stuck exhaust valve, so I pulled the rocker cover and disassembled the exhaust valve for some borescope images. It shook so bad when it manifested in flight, I'm grounded until I figure out what this is. I did determine that the problem would slowly clear up at reduced throttle. It was only at WOT when the cylinder cut out.
When I pulled the valve stem out through the spark plug hole, it was very shiny and smooth. It also slid very easily in and out of the guide before I disassembled it. What is concerning to me, is the photos I have of the valve guide. It looks like a severe taper on the combustion side of the bore - I've never seen one before, so I'm not sure if this is normal.
I didn't do a wobble measurement, but I didn't feel anything excessive when I subjectively compared it to cylinder #2.
Superior XPIO-360, 1100hrs TT. Pmag/Lightspeed ignitions. 8.5:1 cylinders.
Is it time to pull the jug?
Valve Guide Wear?
I am experiencing symptoms consistent with a stuck exhaust valve, so I pulled the rocker cover and disassembled the exhaust valve for some borescope images. It shook so bad when it manifested in flight, I'm grounded until I figure out what this is. I did determine that the problem would slowly...
vansairforce.net
Panel Porn …Dbro172
https://vansairforce.net/threads/show-us-your-panel.12863/page-4#post-1758705
Tool DIY Porn …Dan 57 PIREP
Had some 6061-T6 in my "trash" box, and used that to manufacture said plate... I'm happy to report that despite being only 15/64" (6 mm) thick aluminum, it held pretty good and did not bend any when I did my 400H wobble inspection today.
PS
All good, but for cylinder #2 having barely any play, so the valve was dropped into the cylinder, its stem cleaned from the black gum, and some miraculous fishing performed to reinstall the valve. Ah yeah, and also having fun chasing the wandering keepers.
OFF TOPIC:
PS: Older issues of the ‘VAF News’ can be found at:
Doug's Area ....The VAF News & my flying resume.
Pushed out every now and then.
www.vansairforce.net
