I went through the orientation thing too. When I purchased my Alon, the prop was mis-indexed, probably to make it easier to hand-prop (possibly because the people who installed it didn't know what they were doing). Re-indexing per the manual made a slight reduction in the amplitude of the vibration.
I checked with the prop shop who serviced my prop - THERE IS
NO DIFFERENCE BETWEEN BLADE 1 AND 2 (even though they are
marked) - the prop is symmetrical. There will be a small
difference between blades as there is no perfection - so try
reversing blades 1 and 2 to see if there is any difference
in vibration. If there's a big difference, the prop should
be serviced.
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David Smoler | __ |
|==/__ยค_\==|
*==========|==| () |==|===========*
Alon A-2 | \____/ | N6359V
s/n A35 () () () based at RHV
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J Quinn wrote:
>
> On our Alon, the prop was marked with a number 1 on the front or back of
> the prop very close to the hub. Changing the prop orientation made a
> noticeable difference.
>
> > Wes Hays wrote:
> >
> > I had the same problem with vibration in the 1900 to 2250 rpm range on
> > my Alon when I first got it. In one of the manuals I received with my
> > Alon, it talked about prop orientation on the engine. Sure enough when
> > I checked, it was not as specified in the manual.
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