Fox5flyer
Guest
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 Posted: Fri Oct 19, 2007 5:11 am Post subject: Horiz stab rod ends, was: Attachment fitting at top of lift |
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As I recall Lynn, I believe that is correct. I'm sure the service bulletin
is available on John's web site. Personally, everyone with a IV should have
a look at those rod ends to see if they have the 3/16" units. I'm not
saying they should all be changed, but it's something to be aware of and if
you're in the building process, now is the time to consider upgrading.
Some say it is from mishandling that caused the breakage, which to some
extend may be true. However, there is a lot of down pressure on those rod
ends, even in normal flight. However, in turbulence, they can really take a
beating.
Deke Morisse
S5/NE Michigan
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Is that "history of breakage in the IV" when they were 3/16" rod end
bearings? I know there's an SB on changing these to 1/4", which is what I
did during my building process. I got the AN490 threaded rod ends (1/4"),
welded them myself, and got the necessary 1/4" x 3/16" rod end bearings,
and have been avoiding the grim reaper ever since. : ) (knock on wood)
Lynn Matteson
Grass Lake, Michigan
Kitfox IV Speedster w/Jabiru 2200
flying w/420+ hrs
On Oct 19, 2007, at 7:46 AM, fox5flyer wrote:
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> One thing that needs to be remembered is that AN fittings have "rolled"
> threads, not cut threads. This makes them much stronger than the normal
> non-AN threaded fitting and much less susceptible to stress cracking at
> the threads. Personally, if there was anything to worry about I believe
> it would be the fittings at the horizontal stab where there is a history
> of breakage in the IV.
> For what it's worth.
> Deke
> S5, NE Michigan
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