Originally Posted by mike newall
Thanks for that Scott and quite frankly that shocks me that the factory recommended setting system with precision machined pin, socket etc is considered not that accurate.
It is easy to reference set the blade using the pin, we will then check using the digital to see what it comes to.
The discrepancy between what Sensennich recommend and what they supply does trouble me slightly, hence the question whether it is a Vans specified setting. They say start at 4 but only supply 2 and 3 in the box. I do see that Van's in the latest revision say start with 3 so we will do that
The recommendation of not relying upon only the pins is based on actual experience with many RV-12's (both at Van's and by customers).
keep in mind that the documents Sensenich supplies with the prop are generic. They are not specific to any one airplane. They recommend starting with #4 to assure it will not over speed and will be at least safe for a first flight (amusing you have no other information available to base an initial prop setting on).
If you RV-12 ends up being the same as the majority of them are, if you tweek it for an ideal setting you will likely end up at a setting that is slightly courser than #3 but not as course as #4.