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indigoonlatigo(at)msn.com
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 Posted: Sat Sep 30, 2006 7:27 pm Post subject: Elevator control horns |
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Sorry guys to bring this up again, but it seems that today I spent going
backwards.
I noticed this afternoon while installing my elevator pushrod that once I
clamped down on my connections to the elevator horns that my elevator
counterbalance arms were out of sink with one another. At their most
forward edge, one side was raised by about 3/32" in referencing the top of
the skins. EEEEEE!!!!
Now I know the really great fighter jets use their elevators to aid in roll,
but my situation perhaps might leave me in a slight constant roll to the
right, not what I desire as I am planning doing more that flying circles
over the airport. Maybe this was my benign spiral.
In any case, I thought I drilled my elevator holes as "square as humanly
posible" Perhaps not!!
If not perfectly square once sinched tight, the head of the bolt and the nut
will force the holes to line up and either push/pull,raise/lower or any
combination there of, the second horn into alignment and thus perhaps force
the elevator out "TRAIL" position.
I had that earlier issue with the second hole being too near the bottom edge
due to one horn being higher than the other as it is mounted on the elevator
(due to jigging error)
Now I am forced to do the method of welding or riveting that additional 4130
plate on to the second elevator horn and re drilling. So this got me
thinking.
Riverhead Aero should be making a drilling jig for this aspect of the
project. Basically a block of steel drilled to 3/16" with a saw kerf cut
though the bottom aspect of it so that it would slip over the bottom edge of
the first drilled horn and this jig once clamped would not only keep the
drill going perpendicular while the bit is between the two horns, but the
block would also be on the outside of the first horn to guide the bit upon
initial entry. The blocks thickness being the minimum space between the two
horn+ the saw kerf+ the outside block(1/2") for the outer guide. I know
there is a tooling error in all the horns, so the betweeen space id
different, but he minimum thickness if metal between the two horns and then
the builder could add a popsicle stick to take up the last remaining space.
This assumes that both horn faces are parallel to each other from the get
go.
Just a thought from an anal dentist.
John G.
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jhasbrouck(at)woh.rr.com
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| Posted: Sun Oct 01, 2006 6:00 am Post subject: Elevator control horns |
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John,
All may not be lost. I encountered the same thing when I drilled mine.
The right side counterweight is about 1/8 from being flush with the skin.
Check your trailing edges. I'll bet they're even and that's where it
counts. I've seen this same thing on Van's own -10. I don't think you will
introduce any roll component.
John Hasbrouck
#40264
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