VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.


Go Back   VAF Forums > Model Specific > RV-7/7A
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 01-26-2021, 09:51 AM
jmjula's Avatar
jmjula jmjula is offline
 
Join Date: Oct 2005
Location: Portland, OR
Posts: 188
Default

I had these shimmed as close as one can get given the working area, but there is always a chance I was slightly off. I even went with two thin washers instead of one thick washer in one case because of the thousandths of difference between the two was what was needed. Being an engineer myself, I have an attention to detail that usually means I aim closer to perfection rather than good enough. Lube definitely wasn't the issue either, that center ball was turning freely and still was partially lubed since last annual. There is no play in the center ball and its race, only between the middle ring and the press fit outer ring. This appears to be due to the lateral load on the bearings, of which I'm pretty sure they are not designed for.

I likely do many more barrel rolls than most, maybe a contributing factor, maybe not. I'd be really surprised if I am the only one with this issue, it was small enough of play that I almost missed it...luckily these were not that difficult to remove from the plane, and I will be watching what happens with the new/fixed set even more closely. Replacing is easy enough other than the work involved in either prepping completely new F-633s, or figuring out how to press fit new bearings. Van's also suggested staking the bearings might be good enough to fix this.

Thanks for all the replies!
__________________
James Jula - CFI/II/MEI - N713JL RV-7A First Flight 10/12/15 - "What is chiefly needed is skill rather than machinery." Wilbur Wright, 1902

Last edited by jmjula : 01-28-2021 at 02:22 PM.
Reply With Quote
  #12  
Old 01-26-2021, 11:26 AM
krhea krhea is offline
 
Join Date: Nov 2011
Location: Peck, Kansas
Posts: 147
Default lateral play in ailerons

I had some play in mine, so i wound up replacing the column bushings and putting in precision bolts all the way out and eliminated the play.

Keith Rhea
RV7
2021 donation
Reply With Quote
  #13  
Old 01-26-2021, 12:09 PM
DavidAhrens DavidAhrens is offline
 
Join Date: Feb 2007
Location: Bakersfield, CA
Posts: 82
Default F633 bearings

hello, I needed to replace my column bearings at a little over 800hrs., the outer shell of bearings were loose in the F633's. They were originally pressed and staked in place. I replaced just the bearings using JB weld glue to take up clearances and staked in place. I worked hard when originally built to install them correctly with no side loads on bearings and thought maybe the conical mounted engine produces more vibration working against them?

RV6A
Reply With Quote
  #14  
Old 01-27-2021, 04:45 PM
jmjula's Avatar
jmjula jmjula is offline
 
Join Date: Oct 2005
Location: Portland, OR
Posts: 188
Default

Interesting David. I took a hammer to one of the bearings to see if I could pop them out, and the answer is NOT easily. I haven't tried the 5lb hammer yet though. I ended up buying new F-633s once I realized replacing just the bearing is not going to be straightforward. Staking might have bought some more time, but I damaged one of them beyond use investigating.
__________________
James Jula - CFI/II/MEI - N713JL RV-7A First Flight 10/12/15 - "What is chiefly needed is skill rather than machinery." Wilbur Wright, 1902
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 04:06 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.