Fred,
Realizing that the lines were only an approximation, I took care to
start very small with the cuts to the fuse. When checking for
clearance, one should check full deflection in both full up trim and
full down trim positions. There is a noticeable difference in the
clearance at each extreme. I allowed approximately 1/8" all around the
range...
Keep pluggin' away, brother. You'll be flying soon enough... ;)
Jeff - Baby Blue
336 hours
Fred Klein wrote:
> Hi All,
>
> Step 7 on build manual pg. 19-7 describes the required travel (4
> degrees up, 12 degrees down) of the trailing edge of the tailplane
> from a neutral position. My fuselage had a faint but discernible ridge
> line which I interpreted to be a cut-out line for the slots for the
> tab link-rod TS05 which I previously followed when cutting out the
> slots. As I now have the tailplanes mounted and am measuring to ensure
> they can achieve the required travel, I'm finding that my slots are
> grossly oversized, and most probably will be quite inviting for small
> birds and varmints. Have any of you faced the same situation?
>
> Now that I have marked the location of the tab link-rod in the extreme
> up and down positions, and after taking into account the fore and aft
> movement of the tab link-rod and adding 1/8" clearances, my intention
> is to do some bid patching so that the slot is no larger than required.
>
> I'm unclear as to the meaning of the last sentence on pg. 19-7 where
> it states,
>
> "...as the trailing edge of the tailplane is raised the trailing edge
> of the tab raises even further, the ratio being approximately 1.3 to
> 1. Therefore, when you have raised the trailing edge of the tailplane
> by 12 degrees, the tab should have raised 15.6 degrees relative to the
> tailplane or 27.6 degrees from the zero start position.
> /A maximum total movement of 18 degrees and a minimum of 14.4 degrees
> relative to the tailplane is acceptable."
>
> /Does the last sentence intend: /A maximum total movement *of the trim
> tab* of 18 degrees and a minimum of 14.4 degrees relative to the
> tailplane is acceptable."
>
> /Or am I really missing the point?
>
> Fred
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