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pascal(at)rv10builder.net
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 Posted: Tue May 27, 2008 10:09 am Post subject: Elevators |
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I think what your saying is the parts are all the same and based on the
alignment of the pre punched holes- pretty darn accurate (this does not
include the fiberglass, mind you) but the way the individual builder mounts
and aligns it is where the difference lies.. right? hence some of us have a
non issue and aligning up, while others are off slightly ..
Chad- let me assure you Van's does an excellent job with the aluminum pieces
and hence my going by the plans most of the time and adjusting only when I
know it's a better solution, there is a reason Van's gives specific ranges
to drill holes and I really try to stick to those ranges, in the case of the
elevators there is an adjustment one can make to compensate for the
different drill locations. Believe me when I tell you that there are many
"right" ways to do the same thing, this forum is reviewing what we did at
that step and it's builder driven not a flaw in the piece.. now there are
flaws and that is mentioned as such and usually most of us get aftermarket
pieces to replace those in question, but even then those are not "gotchas"
those are "cautions". Van's BTW has replaced many of those faulty pieces as
builders have brought it to their attention so don't let a low number
builder tell you there is a flaw with a piece or plans as Van's may have
replaced after they received their respective kit.
Study Tim's site and the links he has for other builders, one can learn
quite a lot about the RV-10, but understand that when you're there it will
be a different experience for you..
Pascal
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From: "Rene Felker" <rene(at)felker.com>
Sent: Tuesday, May 27, 2008 10:38 AM
To: <rv10-list(at)matronics.com>
Subject: RE: Re: Elevators
[quote]
Let me try this, it has been a while since I did it..years....and I am not
a
watch maker...
The horns have a relative position to each other based on the construction
of the elevators and their mounting and alignment. Even if the horns we
made perfectly, the construction and mounting of the individual elevators
will affect their end position in 3-d space.
Does that help any?
Rene' Felker
RV-10 N423CF Flying
801-721-6080
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ricksked(at)embarqmail.co
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MauleDriver(at)nc.rr.com
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| Posted: Tue May 27, 2008 4:55 pm Post subject: Elevators |
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Well, I did about the same. To make it worse, the hole as drilled
resulted in the trailing edges being misaligned.
I ended up working with my Tech Counselor to weld over one hole, then
adding a aluminum block between the two horns. I was able to exactly
line up the elevators using the block. The block holds the alignment.
Then re-drilling the 2nd hole for the push rod end. My TC said that was
how it is done on the Pitts.
I think there are a number of ways to fix this including just going with
it the way it is as Vans recommends. But there's just something about
it involving the elevator...
I didn't fully document it but attached is a pic of the block which fits
between the two horns and is attached with 3 AN3 bolts.
Lenny Iszak wrote:
| Quote: |
Arrrghhh, missed this thread by about 20 minutes... drilled my elevator horns by the plans and screwed up... drilled the longer horn into the shorter one, just like Mike described:(
Called Van's, they told me that it will hold up as it is. I have 3/16 of steel from the hole to the edge of the metal. They said for peace of mind I could weld it and redrill.
Tim, If you could add this on your tips page it may save someone from doing the same thing.
There goes my swiss watch airplane... has anyone tried opening up the elevators and replacing the horns with new ones?
Regards,
Lenny
#40803
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=185030#185030
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Lenny Iszak
Joined: 23 Mar 2008
Posts: 270
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| Posted: Tue May 27, 2008 5:51 pm Post subject: Re: Elevators |
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Here are some pictures to illustrate the problem.
Lenny
#40803
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pascal(at)rv10builder.net
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| Posted: Tue May 27, 2008 7:05 pm Post subject: Elevators |
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Looks like mine and looks like you did a nice job too!. I really don't think
one need to worry too much as I figure the bolt will be on tight plus there
is the aft horn as well. Structurally, being Van's wasn't concerned, I trust
it should be fine.
Best of success reaching your comfort decision
Pascal
--------------------------------------------------
From: "Lenny Iszak" <lenard(at)rapiddecision.com>
Sent: Tuesday, May 27, 2008 6:51 PM
To: <rv10-list(at)matronics.com>
Subject: Re: Elevators
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ricksked(at)embarqmail.co
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| Posted: Tue May 27, 2008 8:04 pm Post subject: Elevators |
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Lenny,
It's not a problem... The load is placed fore and aft...1/16" is not a big deal, it's not in shear, it's not going to make your watch stop in this case. Place a bolt in that hole and hang from it somehow....it ain't gonna fail. Later in the build you may get a chance to CUT some of that same material (Meager attempt to modify control cable bracket)...after you replace your band saw blade you'll understand how tough that material is. I've seen RV's with less clearance that what you have there...borrowed time? Maybe but most likely not. If you have ever felt the "feel" of a completed control hook up you will understand how smooth it feels and how well it moves. A good pull on the stick at 170kts is about 3 to 4 pounds of force, it is not that much strain and especially on 4130 steel. Remember there are only 6 aluminum pop rivets holding in your pushrod end into that aluminum tube....that horn is tough as nails. And...you can fall back on edge clearance...which is measured from the center of the hole, not the edge...your fine.
Rick (why do I ask for the flames) Sked
40185
Man I wish I was finished, staring at the wheel pants.
do not archive
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ricksked(at)embarqmail.co
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jesse(at)saintaviation.co
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| Posted: Wed May 28, 2008 3:55 am Post subject: Elevators |
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I was pretty sure those were steel pop rivets holding the pushrod end
in the control tubes. Your point may still be made, but I think
they're steel.
do not archive
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694
On May 27, 2008, at 11:57 PM, Rick Sked wrote:
| Quote: | Remember there are only 6 aluminum pop rivets holding in your
pushrod end into that aluminum tube....
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Lenny Iszak
Joined: 23 Mar 2008
Posts: 270
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| Posted: Wed May 28, 2008 6:39 am Post subject: Re: Elevators |
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Thanks for putting me at ease. I was going to buy new horns and replace them. I'll sleep on it and decide later. For now i'm going to hook it all up.
The rivets in the pushrod are steel, MSP-42.
Lenny
#40803
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