I see. The bowties have a drift pin (or bolt/nut - cannot remember)
through the plastic. Not sure if the ram's horns are attached via a
fastener. So, I think you are telling me that they drill the u-joint
hole last after all is aligned and that each plane gets the hole drilled
in a different place. Sounds kooky.

Does not really matter. The boneyards don't have these things and nobody
has actually done an STC on a reasonably priced alternative. I can live
with the bowties for a LOOOOOONG time when we are talking $1000+ for a
purely cosmetic upgrade.

Thanks,
Mike

Bob Noel wrote:
In article .net,
Mike Spera wrote:


Back in 2002 I got a pair from Wentworth for my 140, and then
had the powdercoated by, iirc, Sanderson Aircraft.

Be prepared for the expense of the hardware and labor required
to install them. It was 19 hours to remove and replace, plus a
chunk of money for all the correct parts. Between the parts,
labor, yokes, and powdercoating, I think it was over $1500.

good luck


Bob,

What is involved other than swapping the yokes at the ends of the
control shafts?


Actually, it's kind of hard to just replace the plastic yoke. The part number
you specified in an assembly that includes the metal shaft and not just the yoke.
There is no separate part number for just the plastic bow-tie or rams horn yoke.
But if you can do it, that would be great because it'll save you a lot of money.

And now I finally remember why I had to do it (at least one anyway), it was
because one of the universal joints was worn beyond the service limit
and some moron had used a regular bolt instead of the tapered bolt.
So, in my case I had to replace the universals on one side anyway.

The universals are custom fit and blind drilled. It's probably unlikely
that the old universal will have the hole in the same place as the
replacement shaft. There is this special tapered bolt that has
to be fitted. I can't find my parts list that I used to order all the
stuff for the mechanic.

If you have access to the illustrated parts list, it's on page 3G16.


Were you converting from one shaft size to another?


nope.