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  #21  
Old 03-24-2010, 10:03 AM
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aviationgeek84 aviationgeek84 is offline
 
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Andrea,

Nope, you're fine. Yes - I think trimming the flange of the spar is particular to the -7 ...

I will be adding these this week and then moving on... gotta build an airplane at some point!
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  #22  
Old 03-30-2010, 09:53 PM
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How did you make out Casey?
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  #23  
Old 03-30-2010, 09:54 PM
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aviationgeek84 aviationgeek84 is offline
 
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Hi Don,

Haven't done it yet, myself... I'm going to have my EAA Tech Counselor stop by and just have a look - maybe give me some pointers. Since I already put the 6 degree bend in the spar, I'm going to get his suggestions as well.
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  #24  
Old 02-06-2011, 07:58 PM
DOX8 DOX8 is offline
 
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I thought I was doing well following the manual until I read this thread. Of course, I already riveted the front spar in place without the reliefs. The written instructions make no mention of the reliefs but they are visible in the picture. Has it ever been determined if there is really an issue here? It appears this problem has been around for several years. If it is an issue, I would have thought that it would have been addressed in the manual by now.
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  #25  
Old 02-07-2011, 04:42 PM
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Dave Bernard Dave Bernard is offline
 
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Quote:
Originally Posted by DOX8 View Post
I thought I was doing well following the manual until I read this thread. Of course, I already riveted the front spar in place without the reliefs. The written instructions make no mention of the reliefs but they are visible in the picture. Has it ever been determined if there is really an issue here? It appears this problem has been around for several years. If it is an issue, I would have thought that it would have been addressed in the manual by now.
+1.

I finished my HS last week, never noticed the relief in the plans.

This should really be in the instructions, or at least a clearer note in the drawings to make sure this gets done.....
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  #26  
Old 02-12-2011, 06:06 PM
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Flyin'Bryan Flyin'Bryan is offline
 
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Quote:
Originally Posted by Dave Bernard View Post
+1.

I finished my HS last week, never noticed the relief in the plans.

This should really be in the instructions, or at least a clearer note in the drawings to make sure this gets done.....
So sounds like many of us are in the same boat on this. My HS is done, and I did not notice the relief holes either. However, I made a conscious decision NOT to add them after having an experienced RV builder who had built several RVs over the years basically tell me that if I was concerned about it to add them, but if not, then don't worry about it. He thought that the bend area would be OK, as long as I smoothed out the area as much as possible to prevent any stress risers from forming, which I did. Problem is he never looked over the plans or anything either.

I decided not to add them based in part on his advise, also ebcause they were not mentioned in the book. In fact, until I read this thread I was convinced that they were not on the plans either. So, after looking them over again, and to be a little more specific, here are the issues that I agree Van's should address in their plans:

1. There is no mentioned to create the relief holes for the -8 assembly instructions, but there definitely is in the RV 7 instructions. If needed the instructions should be added to the -8 isntructions.

2. Section A-A view on the HS plans does seem to show a relief hole near the bend, but there is so much other stuff going on in that drawing it is difficult to tell for certain. The other problem I noticed is that the lines are solid instead of dashed, which leads one to think that those lines belong to the angle HS 814 and HS 810 parts in the front, and NOT part of HS 702 flange in the back. The lines should be dashed, and more attention called to the relief holes in that area of the the plans.

3. Best for last, as some of you have indicated, if you look at the isometric view in the HS plans, there they are --discreetly drawn in the center section -- relief holes in the bend line of the HS 702 flange. I think that Vans should add a note to call attention to these.

I guess at this point I would like to hear from any other RV 8 drivers with completed airplanes that also did not apply these relief holes to HS 702 to see if they experienced any cracking in this area over time, and if they had to repair, or worse yet, replace an entire HS as a result.

How frustrating it is to think you managed to address everything correctly in the plans, only to find out about this well after the fact........
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Last edited by Flyin'Bryan : 02-12-2011 at 06:11 PM.
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  #27  
Old 02-12-2011, 06:54 PM
fatherson fatherson is offline
 
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Quote:
Originally Posted by Don Patrick View Post
I missed it too... Here is a great link to see how it's done right... http://www.rv7factory.com/log/050601.html
Brad Oliver seems to have re-org'ed his site since Don posted that link. I found the page that Don references above at the new link:

http://www.rv7factory.com/log/050601.php

--Stephen
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  #28  
Old 02-12-2011, 09:23 PM
DOX8 DOX8 is offline
 
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I received an e-mail from Van's builder support about this issue. It started by saying that the reliefs are important and ended by saying that if the bend wasn't sharp and less than 90 degrees that it might be OK. So...... I don't know any more than I did before.
I went ahead and used a tiny file to get a radius in the corners and now moving on......finished the VS tonight.
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  #29  
Old 02-12-2011, 10:52 PM
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Hey Jeff,

The way I looked at it was "do the work now to fix it, or do it later when it cracked"...either way, it needs to get done. Then again, I caught mine before I riveted it, which made it easier for me.

You may be lucky and it never goes south on you, or, you can fix it now with a little bit of work and effort and prevent all that extra work down the road in the event it does go bad on you. I couldn't imagine ripping off my tail section, ripping apart my HS and fixing it..what a nightmare that would be.

I'm guessing you have it riveted on already?

I really don't know why Van's doesn't have that one line step in the manual for this, especially for new builders just learning the ropes and how to read blueprints.

Don
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  #30  
Old 02-13-2011, 03:24 AM
hendrik hendrik is offline
 
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At least in the -8 I wouldn't even know how to make that bend properly without removing some material, because the flange rounds out in that area and without cutting this round-out away it will interfere with the bend (the bend is just where the flange ends): http://rv8.linta.de/2010/06/hs-front...continues.html
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