VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics

  #1  
Old 12-04-2018, 01:38 PM
kjowen's Avatar
kjowen kjowen is offline
 
Join Date: Mar 2012
Location: Woodstock, GA
Posts: 128
Default RV-8 Rudder Build Critique ?

Guys,
I continue to finish empennage components. I gotta a few concerns about my workmanship. Take a look and let me know if there are any issues. Thank you.

1) Rudder bend - It's not pretty, but would it cause any issues down the road?
2) The R-809 (fiberglass tip) does not seat with as close a tolerance to the R-713 (counter balance skin) and R-801PP (rudder skin) as I have viewed finished aircraft. Should I be concerned with these or keep building?



__________________
Ken Owen
Marietta, GA
RV-10, N471BG
RV- 8, N297DW, (sold)
RV- 8, Build in progress

VAF 2018 Donation
Reply With Quote
  #2  
Old 12-04-2018, 03:02 PM
sjhurlbut sjhurlbut is offline
 
Join Date: Jan 2005
Posts: 603
Default RV8 parts

The bend on the front of these controls is a pain. Won't really cause any issues and its pretty hidden in there. I would worry about it.

The fiberglass stands a bit high because the inside flange will hit the alum rib on top. No big deal. It will look fine when it painted unless you're going for a showplane.

Build on and don't worry about little details like this. If you're really unhappy when airplane is done you can build another rudder in a weekend.
__________________
"Aerodynamics is for people who can't build engines"
Enzo Ferrari

Steve H
Cold Lake, Alberta
RV7A #70015 - C-FZQX - built - sold
RV7A #71629 - C-FSIS - built - sold across Atlantic
RV7 #70215 - C-GOJU - flying - sold
RV7 #70703 - C-GMIY - flying - sold
RV6 #60119 - C-FHBZ - built - Airventure 2016 Bronze Lindy - sold
RV10 #41779 - built emp - sold
RV8 #82842 - C-FSBG - Fastback with big hp IO-360-A1B6 10:1
Reply With Quote
  #3  
Old 12-04-2018, 03:06 PM
JonJay's Avatar
JonJay JonJay is offline
 
Join Date: Jan 2007
Location: Battleground
Posts: 4,003
Default

First off, I don't see any airworthiness issues.
On the tips, to get a better fit, you can take a sanding block with a sharp edge and sand the joint square. This area has a filet from the molding process and needs to be squared up so the fiberglass tip will regress into the rudder. Make sure you keep that line straight when you sand. Draw a line for reference.

How are you bending the leading edge? Are those dents?
One method is to tape the leading edge down with strong tape to a pipe. Roll the edge while keeping the skin and pipe flat on your table. Vice Grips can be used to grab the pipe. It takes pressure to keep the pipe down on the table while your rolling it and keep the skin down too.

We had a special pipe that allowed the flange to sit in a machined slot that made it easier, but you can still do it with standard schedule #40 plumbers pipe.

Lastly, take a straight edge and lay it on the spar edgewise and down to the traiking edge. This should be straight all the way to the traiking edge bend.
__________________
Smart People do Stupid things all the time. I know, I've seen me do'em.

RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
Reply With Quote
  #4  
Old 12-04-2018, 03:11 PM
JonJay's Avatar
JonJay JonJay is offline
 
Join Date: Jan 2007
Location: Battleground
Posts: 4,003
Default

Steve was typing while I was.
I do, mostly, agree with Steve, however, this is one place I look when evaluating workmanship. I look here because it is one area that tells me how the rest of the build might be.

What is acceptable is up to you. Odds are it will fly just the same the way it is.

By the way, if you can built a rudder in a weekend, your hired, unless it looks like this. Sorry, but I am picky and there is a price to pay in the time it takes to do things "right", at least in my terms. That is just me....
__________________
Smart People do Stupid things all the time. I know, I've seen me do'em.

RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.

Last edited by JonJay : 12-04-2018 at 03:14 PM.
Reply With Quote
  #5  
Old 12-04-2018, 10:29 PM
G-force's Avatar
G-force G-force is offline
 
Join Date: Jun 2006
Location: Castaic, CA
Posts: 523
Default

The fiberglass fit on my -8 tail was bad. I would get the fiberglass fit up on the vertical stab and see how they match up. Mine took alot of work. Reglassing, filling, sanding, etc untill it looked like it should and match the VS fiberglass. Especially if you want to cap the VS glass in front of the rudder counterbalance.




__________________
------------------
Mike Sumner
Castaic, Ca
2018 dues paid
Reply With Quote
  #6  
Old 12-05-2018, 10:01 AM
kjowen's Avatar
kjowen kjowen is offline
 
Join Date: Mar 2012
Location: Woodstock, GA
Posts: 128
Default Thanks guys!

1) I did use a 1" diameter pipe to roll the leading edge, but reworked it several times because I was not happy with the result. I ended up rolling it in sections instead of along the whole length. It is smooth although the pictures look like it has some dents.
2) Good input on the fiberglass tips. thank you to all.
__________________
Ken Owen
Marietta, GA
RV-10, N471BG
RV- 8, N297DW, (sold)
RV- 8, Build in progress

VAF 2018 Donation
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 08:23 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.