jgiallo(at)mindspring.com
Guest
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 Posted: Sun Jun 14, 2009 9:15 pm Post subject: Bolt Hole Clearance - Elevator Horn |
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Garey,
I think I would go with either 3 or 4 although I confess that I don't
think I had this issue. Not to worry though, the rumor that Van's has
actually produced two identical kits has never been proven.....
Regards,
Joe
N813MJ
60+hrs
Garey Wittich wrote:
| Quote: | REF: Regarding the 1/4 inch bolt holes in the Elevator Control Horns,
about which the Left & Right Elevator Horns rotate on the center Hinge
Bearing fastened to the center of the Horiz Stabilizer.
After drilling these 1/4 inch diameter holes (for the AN4 Bolt), these
holes are too close to the weld fillet that welds the torque tube to
the perpendicular part of the Horn. The weld fillets on my L & R
Horns go ALL the way around the Tube. Thus the AN4 Bolt HEAD and
corresponding Nut HEAD will come in contact with the "weld fillet"
BEFORE they are tightened.
After reading the "Archieves" for possible solutions and some of my
own thoughts it seems the options are (looking for the BEST Option):
1) Die Grind the weld fillet in the area where the Bolt and Nut heads
will be, then spot prime with Zinc Chromate.
2) Grind the weld fillet where the Nut Head will be and then use a
reduced size Nut (MS21042-4) that has a smaller diameter than the one
supplied by Vans.
3) Use regular AN960 Washers and "contour them" to fit over the weld
fillet so Bolt Head and Nut fit snug against them. (Will need a
longer Bolt than supplied by Vans.)
4) Make a "thick" washer out of stainless steel (i.e. 1/8" thick) and
"contour it" to fit over the weld fillets; thus the Bolt and Nut heads
have a flat surface to tighten against. Again a longer Bolt will be
required. <----- Seems the BEST approach to me. Any subtle issues
involved ???
How did YOU handle this situation ???????
Appreciate your comments !!!
Thanks, Garey Wittich Santa Monica, CA
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