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  #631  
Old 03-08-2014, 11:51 AM
lllewis45 lllewis45 is offline
 
Join Date: Jun 2012
Location: Erie, CO
Posts: 45
Default No Cracks

RV-7A
2005 quick build
306.8 hrs
light acro
No Cracks
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  #632  
Old 03-08-2014, 03:06 PM
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Mikey Mikey is offline
 
Join Date: Dec 2007
Location: Dayton, NV
Posts: 57
Default Cracks all around

With well over 3000 hours and always a flyer---never a hangar king, Randy Richmond found cracks in all four locations during my annual this week. Louise and Paul say that I'll be having some surgery after I get out to Nevada next month.
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  #633  
Old 03-08-2014, 08:38 PM
Gonzo24 Gonzo24 is offline
 
Join Date: May 2010
Location: NW Ohio
Posts: 128
Question New HS405 ribs being shipped now to replace old HS-405?

Just got my SB kit and I ordered a set of HS-405 root ribs to replace my old ones (long story). The ribs that came are part # HS00005 and look different than the old. The rib flange has 3 serrations and these is no joggle on the flange front.

Has Vans changed the root rib design for the SB now for newer emp kits being sent now? The SB instructions don't show the newer rib style if this is the case on pg 8.

Anyone else receive this new style and do you have pics of it in assembly yet?

Thanks,
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  #634  
Old 03-08-2014, 09:05 PM
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N804RV N804RV is offline
 
Join Date: May 2013
Location: Mount Vernon, Wa
Posts: 643
Default

Quote:
Originally Posted by 60av8tor View Post
The table at the bottom of page 3. I agree it is misleading, but has already been addressed. I forget what the verbiage is actually intended to mean (do a search). But what it doesn't mean is that the SB is N/A for match-hole emp.
Hmmm.....

Does anyone have a copy of DWG-3pp, Rev. 3? Perhaps they could scan and post the figure 2 detail from the dwg, that the SB talks about so we could see it.
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Mount Vernon, WA
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  #635  
Old 03-08-2014, 09:19 PM
mspenc45 mspenc45 is offline
 
Join Date: Aug 2012
Location: Tucson, AZ
Posts: 42
Default N748RV No Cracks!

Did my inspection today and found no cracks in my RV8. Started in 2002, finished in 2009, 350 hours, no cracks and no reliefs
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  #636  
Old 03-09-2014, 03:08 PM
Traash Traash is offline
 
Join Date: Apr 2007
Location: Montgomery, TX
Posts: 43
Default I've got cracks

[IMG][/IMG]

I have 3 cracks in my RV-8. (Lower R, Upper R & L)
Kit 875 delivered and built in 1998.
1210 hours on airframe.
0-360 with Hartzell CS.
Extensive Acro, formation, off paved surface ops.
Notches were present.

Findings are:

Initial inspection found nothing. Second set of eyes noted a small crack on my lower right corner (picture somehow got flipped upside down). Stripped paint (Imron is tough), used die-penetrant and verified a crack emanating from notch much like the SB shows. Also noticed that I had'nt done a great job smoothing the notch. You can see the beginnings of a crack next to the micro-nick on the left side of the notch. It's obvious that this was in the group of first parts that I made. Not the workmanship level I try to achieve now that I know more.

Ordered repair kit and waited two weeks. Finished the rest of my conditional inspection. This was not a fun finding but couldn't have come at a better time.

Received kit and disassembled empenage. Found 3 of the 4 #3 bolts that attach rear horiz spar to vertical posts were not torqued properly. Installed over 10 years ago, torqued to spec and torque seal applied. Every annual I checked to see the torque seal was not indicating movement of nut and bolt. Torque seal was intact. Apparently over 10 years of use since painting and installing parts, the rather thick coats of paint on all parts had shrunk and reduced the torque without any external evidence. I hadn't used the proper method of securing torqued parts. All mating surfaces should be free of paint to avoid this issue. Be advised.

After removal of the ribs I found two more cracks on the upper right and left that had been covered by the rib flange. A little scary to think that I had those cracks and were it not for the SB I would have never seen them. For that matter I don't believe that I would have seen the original crack during my conditional inspections due to its small size and being covered with paint. That's why the SB has you remove paint before inspecting.

Drilling out the reinforcing bars proved to be a two-man operation. I had no problem popping off the heads and driving out the rivet shank with a punch. After filing the required notches (I already had notches from original build. Don't remember putting them in but they were there. Non pre-punched kit) I was able to remove two of the cracks and the third had propagated to the rib flange attach hole.

I installed all the parts but used a slightly different method to align the parts. I was able to cleco the bars to the VERTICAL stab forward spar attach points and then align the reinforcing plates. This made it easy to ensure alignment of the bend angles and proper clearance for all the parts to fit rather than the measure method that the SB described. I was able to make sharpie pen marks on the doubler plates through the existing holes in the bars.



I then clecoed the doublers to the HORIZONTAL spar web, re-aligned the doubler plates using the sharpie marks and side-grip clecoed them in place. Triple re-check everything aligned and commenced to drilling from center to outboard tip, clecoing every hole to keep it tight. Before removing to debur I slipped the main rib into place with the new attach angle side-grip clecoed in place through the lightning hole. Match drilled the 8 attach holes (4 in rib, 4 in spar web) into the attach angle all while clamped in place rather than the SB method of removing to drill. All parts drilled in place before removing or riveting anything.

To date I have hand squeezed the rivets in the center section. Awaiting my next day off to tackle the ones inside the HS. Looks like my offset rivet set and a nice tungsten bar will work fairly easily.

Sure am glad I did this. As always, I found more than I was looking for.
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  #637  
Old 03-09-2014, 04:32 PM
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UnPossible UnPossible is offline
 
Join Date: Jan 2008
Location: Granbury, TX
Posts: 543
Default

RV-7A - finished in 2012... approx. 120 hours
Relief Notches and no cracks so far.

Jason


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RV-7A (Flying and Sold)
RV-10 in process (@#$$%# Cabin Top & Doors)
Paid for 2020
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  #638  
Old 03-10-2014, 07:32 PM
SteveHRV7 SteveHRV7 is offline
 
Join Date: Apr 2006
Location: Okemos, Michigan
Posts: 45
Default No cracks

RV7a, IO-375 with a CS prop
No acro (yet)
56 hours total time
No cracks
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RV7a
Okemos, MI
N807SH
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  #639  
Old 03-12-2014, 08:26 PM
jordanRV6 jordanRV6 is offline
 
Join Date: Feb 2013
Location: Winnfield louisiana
Posts: 25
Default Another HS kit choice in stock

Check out the SB kit at www.antisplat.aero.com.. It is alot less work and you don't have to remove your ribs. They have a video that you can watch on the site.. Check it out.
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  #640  
Old 03-12-2014, 10:01 PM
kjlpdx kjlpdx is offline
 
Join Date: Feb 2014
Location: lake oswego, OR
Posts: 161
Default

I will trust van's engineer, rian, on this issue.
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49 states, Bahamas, Canada
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