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  #11  
Old 11-24-2017, 01:20 PM
rvbuilder2002 rvbuilder2002 is offline
 
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Location: Hubbard Oregon
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Quote:
Originally Posted by mike newall View Post
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.
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  #12  
Old 11-24-2017, 01:38 PM
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mike newall mike newall is offline
 
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Great feedback - thanks
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  #13  
Old 11-24-2017, 02:43 PM
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Jeff Vaughan Jeff Vaughan is offline
 
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Location: West Chester, Pa
Posts: 497
Default Prop Pitch

Just set my pitch
Followed Vans instruction suggestions. Took less than 20 minutes.
Both blades 74.1 !
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RV 12 under construction
RV 7A N561EV Sold
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  #14  
Old 11-24-2017, 03:10 PM
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Piper J3 Piper J3 is offline
 
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Quote:
Originally Posted by Jeff Vaughan View Post
Just set my pitch
Followed Vans instruction suggestions. Took less than 20 minutes.
Both blades 74.1 !
I'm wandering if you transposed a couple of numbers. Pg 47-07 of the Powerplant Instructions state 71.4 degrees prop pitch.
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Jim Stricker
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80 hrs Flying Aeronca Chief 11AC
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  #15  
Old 11-24-2017, 03:22 PM
Dave12 Dave12 is offline
 
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Jeff, check pms.
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  #16  
Old 11-24-2017, 08:35 PM
Hal-san Hal-san is offline
 
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Location: Benton City, WA
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Scott, what is a good number for the tool. I had one but as usual when I need something I can not fine it. thanks
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  #17  
Old 11-24-2017, 09:42 PM
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Jeff Vaughan Jeff Vaughan is offline
 
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Default Ooops

Yes 71.4, I must be dislectic
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