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  #1  
Old 03-08-2017, 03:50 PM
Freightdawg's Avatar
Freightdawg Freightdawg is offline
 
Join Date: Apr 2013
Location: New Albany, IN
Posts: 133
Question Step Support Block

What am I missing here? Step 1 calls for drilling the holes in the blocks with a #10 bit, but the holes in the ribs for the bolts (AN3) are #12. Why the (slightly) larger holes in the blocks, especially if you're using them for guides to match drill the #12s in the ribs?

Thanks.

Jeff
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  #2  
Old 03-08-2017, 03:59 PM
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SeanB SeanB is offline
 
Join Date: Dec 2006
Location: Colorado Springs
Posts: 353
Default material difference

Hi Jeff,

It's been a long time ago for me, but I believe when you drill the blocks, the holes shrink a little once you remove the bit. Probably due to the material type (UHMW or Delrin???). I think you'll find the #12 bit you use to match drill into the aluminum will have a snug fit when you pass it through the #10 holes in the blocks. Maybe confirm this theory if you have a piece of scrap. There are other areas I believe the same #10 technique is used. Check flap arm mounting blocks, rudder pedal blocks, etc.
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  #3  
Old 03-08-2017, 04:13 PM
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Freightdawg Freightdawg is offline
 
Join Date: Apr 2013
Location: New Albany, IN
Posts: 133
Default Yep!

Sean,

You're quite correct. Just got off the phone with Gus at Vans. (I usually forget that service is even available b/c their hours and mine usually don't coincide.) But that's exactly what he said.

Thanks!

Jeff
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Jeff Rich
RV-10 empennage done for now. Wings done for now. Working on the (SB) fuse (Section 36: Brake Lines)
Finishing Kit ordered
N313KC reserved
In the garage for now, KJVY when it outgrows the garage (if we can find a hangar )
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