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 12-11-2017, 06:45 PM
LettersFromFlyoverCountry's Avatar
LettersFromFlyoverCountry LettersFromFlyoverCountry is offline
 
Join Date: Jan 2005
Location: St. Paul, MN.
Posts: 4,719
Default Baggage floor to center section riveting

And we're back.

Tonite's question involves the RV-12iS, Section 21 page three instructions for riveting the three ribs and baggage floor to the center.

Specifically, this line of rivets -- AN470-4-9's -- 12 of which are need on each floor to the center section. Simple.



I am using a TATCO hand squeezer here and you may be able to notice that because the floor interferes, it's not possible to line up the squeezer dies such that you're not going to get either a smiley or an uneven shop head.



You can only hold the squeezer on the aft side of the center section because the small space between the two halves of the center section does not allow coming at it from the other side.

I've tried putting the manufactured head forward (even though I think that's a terrible idea; you'd never be able to drill that head off if you ever had to remove it) and I can, if I work at it, get a smiley-freeze squeeze, but I don't like the uneven manufactured head. I tested putting the manufactured head aft, but you're just asking for a smiley there because the floor interferes with getting the squeezer lined up.

I know what you're thinking: "Hey, Bob, just use an offset rivet set in a gun and buck the darn thing." Alas, I sold the rivet gun when the RV-7A was completed. Besides, the RV-12 kit considers that you're not bucking and shooting so there's a probably a way that will work.

Maybe one of the newfangled squeezers has a different profile that will work here but while I'm not real keen and shelling out big bucks for a new squeezer for 24 AN-470-4-9's, I'm not really that interested in smileys either.

Ideas?
__________________
Bob Collins
St. Paul, MN.
Blog: Letters From Flyover Country
Almost ready to start the RV-12iS finishing kit. 480 hours in.

Builder log

Last edited by LettersFromFlyoverCountry : 12-11-2017 at 07:52 PM.
Reply With Quote
  #2  
Old 12-11-2017, 08:18 PM
cactus76 cactus76 is offline
 
Join Date: Dec 2016
Location: Madisonville, Texas
Posts: 1
Default

Bob

I have both fuselage kits for the RV-12. I just received the iS kit last week and have not started it yet, still working on the wings, but got past this step on the vintage kit before the offer to buy the iS was made.

On Pg. 21iS/U-02, Step 6, the last part of that step describes using 2 thin flush sets and using some tape on the squeezer to protect the floors. That's the same instruction for the vintage kit. I know those aren't flush rivets but I reasoned that the idea was the squeezer could be a bit off center pushed a little bit away from the floor, but square to the rivet and accomplish squeezing the rivets OK. It worked fine, the manufactured heads didn't appear to mind having the flush head set used on the round heads. I used the Cleaveland Main Squeeze tool.

It's just like your 2nd picture, only with the thin, larger diameter of the flush sets it can squarely squeeze those rivets.


Rick Pryor
RV-12iS
Reply With Quote
  #3  
Old 12-11-2017, 08:42 PM
LettersFromFlyoverCountry's Avatar
LettersFromFlyoverCountry LettersFromFlyoverCountry is offline
 
Join Date: Jan 2005
Location: St. Paul, MN.
Posts: 4,719
Default

Seriously? They want me to use a flush set on the shop head?
__________________
Bob Collins
St. Paul, MN.
Blog: Letters From Flyover Country
Almost ready to start the RV-12iS finishing kit. 480 hours in.

Builder log
Reply With Quote
  #4  
Old 12-11-2017, 08:51 PM
rongawer's Avatar
rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 338
Default

Probably not the answer you’re looking for, but I just used a good ol’ rivet gun and bucking bar. Worked like a champ and only took a few minutes to do them all.
__________________
Ron Gawer

- RV10, N1530G (reserved). Empennage in progress.
- RV12, N975G, Flying
Reply With Quote
  #5  
Old 12-11-2017, 08:56 PM
DaveWelch DaveWelch is offline
 
Join Date: Mar 2005
Location: Huntsville, AL
Posts: 316
Default Yup

Quote:
Originally Posted by LettersFromFlyoverCountry View Post
Seriously? They want me to use a flush set on the shop head?
Ricks description jogged my memory, that’s exactly what I did also. The flat die gives you just enough offset to get it done and you’ll have to look close to see any difference on the Mfg head. As I recall it’s an allowable practice also. I tried the offset driver just once. Never again. Need more practice than I had to avoid “smiles” all over the place.
__________________
Dave
RV12 N951DZ
First Flight 9/23/16!
No paint yet. Working on a scheme with John Deere colors or accents.
Reply With Quote
  #6  
Old 12-11-2017, 09:08 PM
rv9builder rv9builder is offline
 
Join Date: Jan 2005
Location: Irvine, CA
Posts: 695
Default

Quote:
Originally Posted by LettersFromFlyoverCountry View Post

I've tried putting the manufactured head forward (even though I think that's a terrible idea; you'd never be able to drill that head off if you ever had to remove it).
Is there enough room to remove it with an angle drill and a very short bit?

Plan B: If you put the manufactured head aft, could you carefully bend the baggage floors down to provide enough room for the squeezer, then bend them back up after riveting?
__________________
Mark
RV-12iS Fuselage
RV-9A Project: Sold

VAF donation made for 2018

Last edited by rv9builder : 12-11-2017 at 09:16 PM.
Reply With Quote
  #7  
Old 12-11-2017, 09:16 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 3,559
Default

Quote:
Originally Posted by LettersFromFlyoverCountry View Post
Seriously? They want me to use a flush set on the shop head?
This is an approved process from MIL-R-47196A, the riveting spec. See paragraph 3.3.3.2.

Dave
Reply With Quote
  #8  
Old 12-11-2017, 09:16 PM
LettersFromFlyoverCountry's Avatar
LettersFromFlyoverCountry LettersFromFlyoverCountry is offline
 
Join Date: Jan 2005
Location: St. Paul, MN.
Posts: 4,719
Default

Quote:
Originally Posted by DaveWelch View Post
Ricks description jogged my memory, that’s exactly what I did also. The flat die gives you just enough offset to get it done and you’ll have to look close to see any difference on the Mfg head. As I recall it’s an allowable practice also. I tried the offset driver just once. Never again. Need more practice than I had to avoid “smiles” all over the place.
OK, cool. This'll be a first.
__________________
Bob Collins
St. Paul, MN.
Blog: Letters From Flyover Country
Almost ready to start the RV-12iS finishing kit. 480 hours in.

Builder log
Reply With Quote
  #9  
Old 12-12-2017, 11:20 AM
LettersFromFlyoverCountry's Avatar
LettersFromFlyoverCountry LettersFromFlyoverCountry is offline
 
Join Date: Jan 2005
Location: St. Paul, MN.
Posts: 4,719
Default

Quote:
Originally Posted by DaveWelch View Post
Ricks description jogged my memory, that’s exactly what I did also. The flat die gives you just enough offset to get it done and you’ll have to look close to see any difference on the Mfg head. As I recall it’s an allowable practice also. I tried the offset driver just once. Never again. Need more practice than I had to avoid “smiles” all over the place.
Guys:

Can't thank you enough for refocusing my attention. There it is on step six, as you said.

I had skipped these two steps on the previous page and jumped ahead because Van's has back ordered on the bag of plate nuts in step five and I didn't want to wait.

The double flush set worked just fine.

Thanks again.
__________________
Bob Collins
St. Paul, MN.
Blog: Letters From Flyover Country
Almost ready to start the RV-12iS finishing kit. 480 hours in.

Builder log
Reply With Quote
  #10  
Old 12-13-2017, 09:02 PM
DaveWelch DaveWelch is offline
 
Join Date: Mar 2005
Location: Huntsville, AL
Posts: 316
Default Good deal

Glad it worked for you. The other "challenge" I remember having was to clamp the flange flat against the spar so that there would be no gap as I was riveting. Took a few trials to get it to hold flat while a was squeezing the rivets. Got 'er done eventually.
__________________
Dave
RV12 N951DZ
First Flight 9/23/16!
No paint yet. Working on a scheme with John Deere colors or accents.
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 05:37 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.