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-   -   The gotcha dimples in the VS skin. (http://www.vansairforce.com/community/showthread.php?t=147740)

RandyAB 03-17-2017 04:22 PM

The gotcha dimples in the VS skin.
 
So despite the warnings abound about the nose ribs denting the skin on the vertical stabilizer skin, and despite grinding the nose ribs down to what it appears others have done (about 1/8") I managed to get a bit of dimpling particularly the middle rib. The outward dimpling remains after removing the skin following the match drilling. It's not huge but noticeable to me.

I was wondering if there was a way to remove them or should I just accept what is and move on?

Cheers!
Randy

rocketman1988 03-17-2017 06:20 PM

Dimple
 
Don't know that there is any good way to remove that dimple (without replacing the skin) but believe me, there will be many more areas that will be nearly imperceptible to others and drive YOU nuts.

You just need to decide how many times you want to rebuild something before it is good enough...

NO ONE has built a perfect airplane...everyone has their "less than perfect" areas...:D

rvanstory 03-17-2017 06:33 PM

I had the EXACT same issue. Being a little OCD :), it drove me crazy, until I finished the VS. Now, I don't even notice and no one else (other builders or tech counselor) has noticed.

Accept it's not perfect and move on. I did better grinding edge off of Horizontal stab unit (with same warning about ribs) and no dents.

Too bad we can't build an entire plane "just for practice". :D The 2nd time doing anything is always easier.

RandyAB 03-17-2017 06:52 PM

Thanks boys. That's what I thought. I'm understanding from starting this that it is important to pay attention to good workmanship, but that if one gets too OCD then the pace of work will make completing the project a very distant dream if not an impossibility.

This is but a small problem. The thing that PO's me is that it's a well documented gotcha. Until the skin is in place though it'd difficult to tell if you rounded the ribs enough and by then it is too late.

One thing I had considered was centering a bucking bar behind and giving it a short couple taps with a flush face rivet gun. I don't know if that's been tried before but it sounds plausible to me.

Randy

rvanstory 03-17-2017 07:55 PM

One suggestion.... I did get a small "dent" on a skin from laying it on something on my work bench. I took a hardwood block of wood for the back "bucking bar" and a smooth brass hammer head to the dent side and simply pressed on the dent against the wood. Seemed to work good for me. I felt is was more forgiving than the rivet gun pounding on it.

RandyAB 03-17-2017 08:32 PM

Ya, that's another thing I learned very quickly.....keep the workbench clean. Now I see why people put a light carpet on theirs. I think I will do the same.

I don't think I'm going to sweat this much. I think I will be the only one who notices.

R

Palamedes 03-17-2017 09:35 PM

This is one of those things that only other Van's builders would notice. And just about all of them will ask you if you had the problem.. Mostly because they did the same thing!

I know I ground down my nose ribs and still have the dimples.. hah

At this point I see it as a right of passage =)

unitink72 03-17-2017 09:37 PM

Told vans
 
I emailed Vans about this issue as I think it's a pretty big deficiency in the plans. They said its in section 5 (is that right?), but I don't recall seeing it. It gets most people, in my view it needs to be mentioned in section 6

RandyAB 03-17-2017 10:28 PM

Thanks Jason. I find your Youtube videos very helpful! Keep up the good work! :)

RandyAB 03-17-2017 10:35 PM

Quote:

Originally Posted by unitink72 (Post 1158794)
I emailed Vans about this issue as I think it's a pretty big deficiency in the plans. They said its in section 5 (is that right?), but I don't recall seeing it. It gets most people, in my view it needs to be mentioned in section 6

It's not mentioned at all in Section 6. I think it would be a nice addition to the plans. I think it would be nice if there were a more explicit guide as to exactly how much of the rib to remove. My guestimate of about 1/8" as per other builders was just a tad too conservative.


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