VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 12-11-2017, 10:34 AM
butch butch is offline
 
Join Date: Oct 2006
Location: Hutchinson, MN
Posts: 239
Default HR axle shim

Please send picture of orientation of axle shim.

butch
Reply With Quote
  #2  
Old 12-18-2017, 09:28 AM
butch butch is offline
 
Join Date: Oct 2006
Location: Hutchinson, MN
Posts: 239
Default shims

Has anybody used axle shims?

butch
Reply With Quote
  #3  
Old 12-18-2017, 09:54 AM
Toobuilder's Avatar
Toobuilder Toobuilder is offline
 
Join Date: Jul 2009
Location: Mojave
Posts: 3,796
Default

Axle shims are used to correct variances in fabrication. If you are lucky they are not needed at all. That said, their requirement is very much dependent on your individual setup. You might need one side only, or one correcting for toe in on the left, and one for more camber on the right. There is no "one size fits all" approach. You just have to figure it out through measurement of your bird.

Here's mine. The shim is shown in red.



You may note that I changed the attach hardware to eliminate the threads loaded in shear. I used Hi-Loc pins installed from the other direction on three places.
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI instalation in work
RV-8 - Flying
1940 Taylorcraft BL-65 -flying
PA-20-inspired "family truckster" -in work

Last edited by Toobuilder : 12-18-2017 at 09:58 AM.
Reply With Quote
  #4  
Old 12-18-2017, 09:59 AM
Veetail88's Avatar
Veetail88 Veetail88 is offline
 
Join Date: Oct 2008
Location: Hales Corners, WI
Posts: 825
Default

Quote:
Originally Posted by butch View Post
Has anybody used axle shims?

butch
Ha! I did on my 8. Took a lot of time measuring before drilling the gear mount holes to get the toe in/out perfect. When I got her on the wheels I measured again only to find to my dissapointment that it was way off. Ordered shims from Van’s to correct and installed them. Wore out the first set of tires in the first 100 hours and the plane was a little squirrelly so I checked the alignment again. Turns out I thought I made a mistake, but I was mistaken! Took them back out, installed new tires and Bob,s your uncle, everything’s is great! 300 hours on the second set of tires and they look like new! Squirrelyness disappeared as well.

But the real answer to your question is that you have to figure it out. Why did you order them? What are you trying to fix?
__________________
Jesse Bentley
N229Z - RV-8 - Flying - Livin' the dream!
Reply With Quote
  #5  
Old 12-19-2017, 09:31 AM
butch butch is offline
 
Join Date: Oct 2006
Location: Hutchinson, MN
Posts: 239
Default shim

Excessive wear on the inside,(45hr)I will have to resort to putting it on grees plates to determine.

Tail high or low?



butch

Last edited by butch : 12-19-2017 at 09:51 AM.
Reply With Quote
  #6  
Old 12-19-2017, 11:56 AM
Toobuilder's Avatar
Toobuilder Toobuilder is offline
 
Join Date: Jul 2009
Location: Mojave
Posts: 3,796
Default

How does the gear react when you push it around? Does it splay out going one direction, then reverse when going the other direction? Does the tire skip once it gets to a slippery spot on the floor/ramp? If so, then you have a toe problem. Since you have excessive inside wear, I'd bet you are toe out, which is causing excessive splay, riding and wearing the inside.
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI instalation in work
RV-8 - Flying
1940 Taylorcraft BL-65 -flying
PA-20-inspired "family truckster" -in work
Reply With Quote
  #7  
Old 12-19-2017, 03:30 PM
butch butch is offline
 
Join Date: Oct 2006
Location: Hutchinson, MN
Posts: 239
Default shim

Tail high (wheel landing)tracking loaded is perfect, Tail low camber and toe or poor.

butch
Reply With Quote
  #8  
Old 12-20-2017, 09:12 AM
vfrazier's Avatar
vfrazier vfrazier is offline
 
Join Date: Jan 2007
Location: Mount Vernon, IN
Posts: 1,062
Default

I'm sure there will be other opinions, but we tell the Rocket guys to set the alignment with the tail on the ground and with the plane loaded to average flying weight. So, put in 200# of ballast in the pilot seat, and fill the gas tanks before you start.

Doing it with the tail up only makes sense if you plan to taxi with the tail up.

Greased plates are the gold standard, but cleverly used Harbor Freight furniture dollies could be used too, even if they are a bit harder to hoist the plane onto.
__________________
Vince Frazier
www.f1aircraft.com
F1 Rocket and F4 Raider components
www.flyboyaccessories.com
RV and Rocket Accessories, Tailwheels, Tools, & More
1-888-8FLYBOY (1-888-835-9269)

F4 Raider - under construction
F1-H Rocket "Crazy Horse" - sold
RV-4 "Chief Pontiac" - sold
Reply With Quote
  #9  
Old 12-20-2017, 09:13 AM
vfrazier's Avatar
vfrazier vfrazier is offline
 
Join Date: Jan 2007
Location: Mount Vernon, IN
Posts: 1,062
Default

BTW, Mikes hi-locs look like a great idea. Maybe he'll do us Rocket guys a favor and post the part numbers here!!!!!
__________________
Vince Frazier
www.f1aircraft.com
F1 Rocket and F4 Raider components
www.flyboyaccessories.com
RV and Rocket Accessories, Tailwheels, Tools, & More
1-888-8FLYBOY (1-888-835-9269)

F4 Raider - under construction
F1-H Rocket "Crazy Horse" - sold
RV-4 "Chief Pontiac" - sold
Reply With Quote
  #10  
Old 12-20-2017, 10:12 AM
Toobuilder's Avatar
Toobuilder Toobuilder is offline
 
Join Date: Jul 2009
Location: Mojave
Posts: 3,796
Default

Going from memory they are HL48-8-22. Will verify when I get home tonight.

Edit - memory verified. The above is what I used on my ship. Be aware that these pins have minimal extra thread length - similar to NAS series bolts. Per my usual practice I used MS21042 "jet nuts" on the other side. Makes a nice tight package. Not sure regular nylock nuts will fully engage anyway.
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI instalation in work
RV-8 - Flying
1940 Taylorcraft BL-65 -flying
PA-20-inspired "family truckster" -in work

Last edited by Toobuilder : 12-20-2017 at 07:55 PM.
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 07:51 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.