KitLog pro

Powered By Kitlog Pro v2.0

Jims RV-8
' style=
Date:  10-2-2016
Number of Hours:  2.60
Manual Reference:  8-56
Brief Description:  Drilling the elevator horns

I placed the spacer washers into/on the ¼” bolt and slid the bolt into the elevator horn / bearing/ elevator horn which took a little bit of tape to hold the bottom of the spacer washers together. With the spacer washers held together with the tape, I was able to slide the washers into place and then slide the ¼” bolt thru the washers and then pull out the tape. Once both elevators were installed and bolted to the bearing, I clamped the counterbalance arms into the trailing (neutral) position.

I had marked both of the elevator horns at the 3/8” line both horizontally and vertically at the bottom of the elevator horn. As the horns are not usually equidistant, the aft-most horn gets drilled AT the 3/8” dimension which allows the more forward elevator horn plenty of edge distance. Mine was just a little offset, and the left horn was just slightly aft – so it would be drilled first. I predrilled it with a #40 drill and then finish drilled with a #12 bit. Prior to drilling the other elevator horn, I made a drill guide out of hardwood with a 3/16” hole drilled thru it at the proper place. The drill guide will allow the hole to be drilled on the right elevator horn based on where the hole is on the left horn so that the elevators are both in neutral and so that they move in unison.

I positioned the drill guide block in between the elevator horns and clamped it in position – and using my hole in the left horn drilled (to #12) the right horn. I was sure to keep the drill perpendicular to the horn and not let it creep and “hollow out” the first hole…well, at least that’s what I thought I did. The right side (hole) came out great but I actually ended up hollowing out the left side (original) hole a little bit and it is no longer #12 on the left side. L I will need to get the hole welded shut and then re-drill it at the 3/8” x 3/8” measurement.
' style=

clamped at neutral

clamped at neutral

' style=

hardwood spacer

hardwood spacer

' style=

drilled

drilled

' style=










Copyright © 2001-2024 Matronics. All Rights Reserved.