VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-12
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 10-05-2018, 08:09 AM
Mich48041 Mich48041 is offline
 
Join Date: Apr 2008
Location: Riley TWP MI
Posts: 2,736
Default Easier Way To Measure Stabilator Cable Tension

Not wanting to crawl into the tail cone to measure stabilator cable tension, I thought of an easier way to check the tension.
Move the control stick full aft until the stabilator hits the stop. Note the fore-aft position of the control stick. Attach a fish scale
to the control stick 1" from the top and pull the scale aft until 5 pounds are displayed. Measure the distance that the top
of the control stick moves. Repeat with the control stick full forward. I do not know how far the stick should move.
I will leave that calculation up to a mechanical engineer. My guess is that the control stick should move somewhere between
1/4" and 1/2" with 5 pounds of force applied.
Is this a valid way to measure stabilator cable tension or am I missing something?
__________________
Joe Gores
RV-12 Flying
Reply With Quote
  #2  
Old 10-05-2018, 12:24 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,854
Default

Quote:
Originally Posted by Mich48041 View Post
Is this a valid way to measure stabilator cable tension or am I missing something?
No, It is not.
__________________
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
Reply With Quote
  #3  
Old 10-05-2018, 05:21 PM
Bob Kuykendall's Avatar
Bob Kuykendall Bob Kuykendall is offline
 
Join Date: Sep 2006
Location: Douglas Flat, CA
Posts: 576
Default

Quote:
Originally Posted by rvbuilder2002 View Post
No, It is not.
Just so; it's more a measure of cable and airframe stiffness than anything else.
__________________
Bob Kuykendall
HP-24 kit sailplane
EAA Technical Counselor
Reply With Quote
  #4  
Old 10-05-2018, 09:47 PM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,357
Default

Itís pretty obvious when the tension is too loose from the stick feel. When too tight not so much!
Reply With Quote
  #5  
Old 10-06-2018, 06:47 AM
Mich48041 Mich48041 is offline
 
Join Date: Apr 2008
Location: Riley TWP MI
Posts: 2,736
Default

Applying a force to the control stick and measuring the deflection is the same principle used by many cable tension meters. The challenge is accurately converting that deflection to tension. It would be interesting to try this test on a RV-12 that previously has had its stabilator cable tension accurately set.
__________________
Joe Gores
RV-12 Flying
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 04:56 PM.


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.