Ian & Irene Beadle wrote:

Paul, it looks like making a 2.85 drive using the six pinion will be

difficult as there does not appear to be room for the drive bolts. It
certainly won't be a drop in replacement in the Ross box. Mine has done 40
hours trouble free so far.

Ian RV6A
beadles@webace.com.au

That could be. It will be easier for Tracy however as the end of his
prop shaft is splined and that should fit the six pinion planet carrier
but maybe not. I just took a look at it and the spline on Tracy's
shaft is slightly larger. It looks like the the new six pinion steel

planet

carrier can be bored out and re-splined to fit Tracy's prop shaft.

What about drilling the pinion shafts and using six 1/4 inch
bolts to bolt it to the Ross prop shaft flange.


Paul Lamar

IMHO, drilling the pinion housing for drive bolts is the wrong way to go.
It makes the drive un-maintainable for the owner, increases the labor
content and does not allow for the self-adjusting clearance needed for
optimum load sharing of the pinions.  I will use the stock spline and have a
new prop shaft made to fit.  This way you can go to Ford for replacement
parts.   The new shaft is a $7000.00 financial hit but worth it in the long
run.  Making these investments is what Ross was trying to avoid but you see
where it lead.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

This reminds me of how I had to work on Richard VanGrunsven a few years before
he relented and designed the four place RV10 :-)
 
Paul Lamar
 
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