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  #1  
Old 09-22-2018, 03:23 PM
mciaglia mciaglia is online now
 
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Location: Houston, TX
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Default Elevator horn drill

Well, I decided to go back to the empanage attach while I wait for my finish kit. I mounted the elevators and did the horn drilling. I followed the instructions exactly but ended up with an off set hole downward. It’s still in perfect fore-aft alignment because my elevators are only about a 1/32” off between them. I’m going to check with Vans, but thought I would get some weekend input

Pic: https://c1.staticflickr.com/2/1964/4...055c8e_o_d.jpg
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Last edited by DeltaRomeo : 09-23-2018 at 09:09 AM. Reason: replaced large image with link to large image (for word wrapping)
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  #2  
Old 09-22-2018, 03:28 PM
lr172 lr172 is offline
 
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Are the trailing edges in straight, parallel alignment or is the right in an offset?

As long as the elevators are in alignment, I don't see how the symmetry of the holes matters, as long as there is enough meat left to hold the bolt.

Larry
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  #3  
Old 09-23-2018, 06:57 AM
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Bill.Peyton Bill.Peyton is offline
 
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I can't see how the two horns ended up a different vertical height.

The issue is going to be that when you tighten the bolt and the holes get pulled into alignment vertically, does it pull the elevators out of alignment. Also, as Larry pointed out, your edge distance on the left hole.
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  #4  
Old 09-23-2018, 09:32 AM
lr172 lr172 is offline
 
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Quote:
Originally Posted by Bill.Peyton View Post
I can't see how the two horns ended up a different vertical height.
One idea worth checking here is that the right inboard heim is running straight (90*) into the rear spar. If it weren't perpindicular to the spar it could cause a misalignment of the elevator.

Larry
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  #5  
Old 09-23-2018, 10:37 AM
rvdave rvdave is offline
 
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I did a similar thing in error and corrected it by redrilling and welding in a washer to move the hole. This was acceptable by Vans.
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Last edited by rvdave : 09-23-2018 at 10:38 AM. Reason: Sp
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  #6  
Old 09-23-2018, 10:39 AM
mciaglia mciaglia is online now
 
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Had the hole welded this am. Take 2 on drilling this
I think the pic gives the sense that the right one is lower. They’re equal in length. Thee right one is slightly forward relative to the left one. The bearing bolt on top is drilled has the elevators in smooth movement. The bearings are all exactly 7/8” and the counterbalances have an equal 1/8” gap. First fit with no problems.
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  #7  
Old 09-23-2018, 05:45 PM
RandyAB RandyAB is offline
 
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Quote:
Originally Posted by Bill.Peyton View Post
I can't see how the two horns ended up a different vertical height.

The issue is going to be that when you tighten the bolt and the holes get pulled into alignment vertically, does it pull the elevators out of alignment. Also, as Larry pointed out, your edge distance on the left hole.
Mine were actually a bit offset too like Mark's.
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  #8  
Old 09-23-2018, 06:32 PM
mciaglia mciaglia is online now
 
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Second time it came out perfect. I used a piece of delrin shaved down to fit between the two horns. I triple checked the drill press and the drill once clamped into position.
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N189PT- Christen Eagle II
N627DG (reserved)- RV10 in the making
www.marksfamilyrv10.wordpress.com
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