VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-14
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 06-24-2019, 04:27 PM
Stockmanreef Stockmanreef is offline
 
Join Date: Nov 2012
Location: Midland, mi
Posts: 789
Default Prop governor adjustment Question

I am in the process of adjusting the arm of the prop governor. What is the best way to do this.

1. take off the arm and adjust to the correct position?
2. loosen the nuts on the head and rotate?
3. the Hartzell prop governor installation guide says to use CM311 thread lock on the bolts for the head. What is this material? Who makes it? Is there a loctite equivalent?

Thanks
__________________
Ken Stockman
Midland, MI
EAA Chapter 1093 member


RV-14a (serial number 140073)
N73XP (at least that # reserved now)
Reply With Quote
  #2  
Old 06-24-2019, 06:03 PM
Scott Hersha Scott Hersha is offline
 
Join Date: Jan 2005
Location: Cincinnati, OH
Posts: 1,212
Default

You should have enough adjustment range using the adjustable stops on the governor - during Phase I. You will have some additional lattitude with the bracket clamp nuts, and the rod end bearing. Initial adjustment should be based on cockpit lever control limits. Make sure you can get the full range of motion (stop to stop) from the cockpit. Leaving a little range of motion on each end from the cockpit allows minor FWF adjustments during phase I.

I used blue locktite on the fasteners. That’s the color of what was on there to begin with from Hartzell.
__________________
SH
RV6/2001 built/sold 2005
RV8 Fastback/2008 built/sold 2015
RV4/bought 2016/sold/2017
RV8/2018 built/Sold(sadly)
RV4/bought 2019 Flying
Cincinnati, OH/KHAO
JAN2019
Reply With Quote
  #3  
Old 06-24-2019, 06:11 PM
Stockmanreef Stockmanreef is offline
 
Join Date: Nov 2012
Location: Midland, mi
Posts: 789
Default

well based on the plans, there the 50 % mark should be 90 degrees to the bracket. Mine is not even close. I put on the bracket and then loosened all the screws and the head did not move. I ws not forcing any thing. If I can remove the arm, then that would be easier, but this it needs to be re-torqued. This may or may not be easy to torque. This its why I would prefer to loosen screws and move the head.

Does this make sense?
__________________
Ken Stockman
Midland, MI
EAA Chapter 1093 member


RV-14a (serial number 140073)
N73XP (at least that # reserved now)
Reply With Quote
  #4  
Old 06-24-2019, 06:30 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,099
Default

This may or may not be relevant, but, on my -10 with Hartzel governor, I had to: remove the screws completely (keep pressure on the end, an internal spring will try to push it apart); rotate the end of the governor; re-insert the screws.

Last edited by BobTurner : 06-24-2019 at 06:32 PM.
Reply With Quote
  #5  
Old 06-24-2019, 08:43 PM
Stockmanreef Stockmanreef is offline
 
Join Date: Nov 2012
Location: Midland, mi
Posts: 789
Default

With my luck if I tried that trick, it would come apart. Maybe I will try it anyway. First I will loosen again to see if I can get the head to move.
__________________
Ken Stockman
Midland, MI
EAA Chapter 1093 member


RV-14a (serial number 140073)
N73XP (at least that # reserved now)
Reply With Quote
  #6  
Old 06-24-2019, 09:29 PM
Scott Hersha Scott Hersha is offline
 
Join Date: Jan 2005
Location: Cincinnati, OH
Posts: 1,212
Default

On mine, I was able to move the head with the screws loosened but not removed. I also took the short lever arm off and installed a longer one. All this involved was removing the nut holding it on. The short lever that came with it, along with a powerful return spring required me to lock the friction lock on my quadrant to hold the set RPM on my RV8. This made it impossible to move the throttle, since the whole quadrant was now locked. The longer lever arm fixed that problem, also gave me a better range of motion.
__________________
SH
RV6/2001 built/sold 2005
RV8 Fastback/2008 built/sold 2015
RV4/bought 2016/sold/2017
RV8/2018 built/Sold(sadly)
RV4/bought 2019 Flying
Cincinnati, OH/KHAO
JAN2019
Reply With Quote
  #7  
Old 06-24-2019, 11:44 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 8,560
Default

Not all governors are the same.

On many you can rotate the control head with the screws just loosened.
As already mentioned (if I remember correctly) the Hartzel does require that you full remove the screws.
__________________
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
  #8  
Old 06-27-2019, 04:07 PM
Stockmanreef Stockmanreef is offline
 
Join Date: Nov 2012
Location: Midland, mi
Posts: 789
Default

well I have the governor in place. The service letter says to torque down to 18-20 lb pounds. I assume that one needs to use a crows foot to do this.

Questions:

1. should I try to move the head to the correct position before torquing down the bolts that hold the governor in place or do I have to torque down?
2. Should I wait to torque down nuts and adjust the arm until after the engine is hung? Would it be easier to torque down at that point?


Thanks
__________________
Ken Stockman
Midland, MI
EAA Chapter 1093 member


RV-14a (serial number 140073)
N73XP (at least that # reserved now)
Reply With Quote
  #9  
Old 06-27-2019, 08:58 PM
Scott Hersha Scott Hersha is offline
 
Join Date: Jan 2005
Location: Cincinnati, OH
Posts: 1,212
Default

My Hartzell governor does not require you to remove the screws to move the head in a limited range (maybe 15 degrees). If you want to move it more than that, youíll need to remove the screws and rotate the head to the next slot in the direction you need (I did that). Once those screws are inserted in those slots, you have a range of movement. Make sure you put new blue locktite on these screws if you move them. This movement affects the torque applied to the lever arm by the push-pull control. Try to make this lever arm movement at the midpoint range on the lever arm at the midpoint range on the cockpit lever/control for the prop. The return spring is rather strong (to fine pitch) on the newer Hartzell prop governors, and a vernier control is a plus here. Thatís why a longer lever worked for me (less leverage on the return spring).
__________________
SH
RV6/2001 built/sold 2005
RV8 Fastback/2008 built/sold 2015
RV4/bought 2016/sold/2017
RV8/2018 built/Sold(sadly)
RV4/bought 2019 Flying
Cincinnati, OH/KHAO
JAN2019
Reply With Quote
  #10  
Old 06-27-2019, 11:27 PM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 4,459
Default

Quote:
Originally Posted by Scott Hersha View Post
The return spring is rather strong (to fine pitch) on the newer Hartzell prop governors, and a vernier control is a plus here. .
Sorry for the thread drift here. However, I am about to install my hartzell governor in a week and am new to CS props. I thought the spring pulled the arm against the adjustable stop and this was the max RPM limit / finer pitch and that you pulled against that spring to bring the prop RPM down/courser pitch.

Did I understand that wrong?

Larry
__________________
N64LR
RV-6A / IO-320, Flying as of 8/2015
RV-10 in Phase I
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 03:01 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.