VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-8/8A
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 11-11-2013, 01:54 PM
BonitaRV8 BonitaRV8 is offline
 
Join Date: Feb 2012
Location: Bonita, Ca
Posts: 56
Default Elevator/aileron push rod and control stick question

Having just installed the aileron & elevator control assembly I noticed when I deflect the control stick to the full deflection for the ailerons that at about half the possible stick travel I feel the stick resistance increase. After further investigation I determined that the aft rod end of the center elevator pushrod hits the bell crank and then the rod end turns inside the pushrod which is the increase in resistance. The center push rod still clears the cutout for it in fuselage bulkhead with full stick travel. I have the correct washers installed between the bell crank and the rod end so that's not the problem. I don?t have the wings installed yet so maybe the stick can travel much further than it will with the wings/ailerons installed?
__________________
Empannagee done
Wings 90% done
Received fuselage
Reply With Quote
  #2  
Old 11-11-2013, 02:04 PM
DanH's Avatar
DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 9,500
Default

Quote:
Originally Posted by BonitaRV8 View Post
I don?t have the wings installed yet so maybe the stick can travel much further than it will with the wings/ailerons installed?
Yes. That said, the rod end needs to be carefully checked for available angular travel at final assembly.
__________________
Dan Horton
RV-8 SS
Barrett IO-390
Reply With Quote
  #3  
Old 11-11-2013, 02:29 PM
Mike S's Avatar
Mike S Mike S is offline
Senior Curmudgeon
 
Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
Default

Quote:
Originally Posted by BonitaRV8 View Post
-----then the rod end turns inside the pushrod----
If this still happens after installing the control surfaces, you need to deal with it.

For the rod end to turn inside the pushrod is unacceptable. It needs to be locked in place with a jam nut or safety wired.
__________________
Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
Reply With Quote
  #4  
Old 11-14-2013, 09:45 AM
grayforge's Avatar
grayforge grayforge is offline
 
Join Date: Dec 2011
Location: Kirkland, WA
Posts: 886
Default

I was a bit concerned when I felt this 'soft stop' in my control stick travel. As Dan mentioned, this was an angular travel limitation. I found that as you move the stick forward & aft, the large aileron push tube rotates, as it should. But if you don't have the rod ends clocked so that both are at the midpoints of their travel while the stick is near its center position, one rod end will reach the end of its travel before the stick reaches full deflection.

So yeah, good point to stop and investigate any curious findings. :-)
__________________
Speed Is Life

VAF Donation made: 1/28/2020, My RV-7A Build Log
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 05:30 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.