VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.


Go Back   VAF Forums > Model Specific > RV-10
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 02-21-2021, 07:39 AM
Caribbean10 Caribbean10 is offline
 
Join Date: Jan 2020
Location: Puerto Rico
Posts: 17
Default HS - Match drilling spar cap into spar flange

So the RV-10 build instructions tell you to match drill the HS spar caps into the spar flanges using a 3/32" drill (Not a #40 drill). In a later step, you come back and final drill some of those holes using a #40.

My tool kit didn't come with a 3/32" bit. So can I match drill these holes using #40 or do I have to use a 3/32"? And if I do have to use a 3/32, would I be fine using my regular Home Depot Dewalt multipurpose 3/32" bit or do I need to get something better?
Reply With Quote
  #2  
Old 02-21-2021, 08:27 AM
flion's Avatar
flion flion is offline
 
Join Date: Dec 2007
Location: Flagstaff, AZ
Posts: 2,672
Default

Depends how exact you want to be. Best practice is to drill 3/32" and ream to #40 later. Home Depot (or other local places) will sell cobalt bits in fractional sizes. You should also consider investing in a complete drill set with extras in #30 and #40 plus 6" and 12" drills in the common sizes and reamers, too. Good tools make a difference. That said, many RVs have been built without reamers, etc. There is a certain tolerance, so it will be up to you whether you can accept 'good enough' over 'best'.
__________________
Patrick Kelley - Flagstaff, AZ
RV-6A N156PK - Flying too much to paint
RV-10 14MX(reserved) - Fuselage on gear
http://www.mykitlog.com/flion/
EAA Technical Counselor #5357
Reply With Quote
  #3  
Old 02-21-2021, 09:03 AM
No_0ne No_0ne is offline
 
Join Date: Jan 2016
Location: Martin, Tn
Posts: 61
Default

https://www.amazon.com/Viking-Norsem...3919200&sr=8-3

Buy a really good set of drill bits. Add some extra #30 and #40, in short and long lengths.
Reply With Quote
  #4  
Old 02-21-2021, 05:27 PM
hillc95 hillc95 is offline
 
Join Date: May 2014
Location: Jacksonville, FL
Posts: 49
Default

FWIW it took me one kit to swap over to using a reamer anytime I final "drill" any holes.....Vans put out a video highly recommending reaming over drilling as well
__________________
Chris
N654CH reserved
n654ch.blogspot.com
Reply With Quote
  #5  
Old 02-21-2021, 05:48 PM
No_0ne No_0ne is offline
 
Join Date: Jan 2016
Location: Martin, Tn
Posts: 61
Default

Quote:
Originally Posted by hillc95 View Post
FWIW it took me one kit to swap over to using a reamer anytime I final "drill" any holes.....Vans put out a video highly recommending reaming over drilling as well
Agreed on the reamers, I keep examples of all the commonly used sizes. You still need a quality set of drill bits though, which is why I recommended the set above. In the scheme of what tools are most useful, versus what they cost, having a good selection of bits is a wise investment.
Reply With Quote
  #6  
Old 02-21-2021, 05:53 PM
hillc95 hillc95 is offline
 
Join Date: May 2014
Location: Jacksonville, FL
Posts: 49
Default

Agreed. IF I have to get a bit from the hardware store I learned the hard way you need to buy the premium ones they have. Getting a regular bit (even if it says it's rated for metal) ends up chattering on the aluminum rather than actually drilling.
__________________
Chris
N654CH reserved
n654ch.blogspot.com
Reply With Quote
  #7  
Old 02-22-2021, 06:28 AM
Caribbean10 Caribbean10 is offline
 
Join Date: Jan 2020
Location: Puerto Rico
Posts: 17
Default

Quote:
Originally Posted by flion View Post
Depends how exact you want to be. Best practice is to drill 3/32" and ream to #40 later. Home Depot (or other local places) will sell cobalt bits in fractional sizes. You should also consider investing in a complete drill set with extras in #30 and #40 plus 6" and 12" drills in the common sizes and reamers, too. Good tools make a difference. That said, many RVs have been built without reamers, etc. There is a certain tolerance, so it will be up to you whether you can accept 'good enough' over 'best'.
Yeah I have the kit from Cleaveland that contains all sorts of drill bit sizes and reamers, but it didn't come with 3/32, which is why the question. Wasn't sure if it was optional or recommended or what. Luckily I do already have a nice set of Cobalt fractional bits that I can use for this.

Quote:
Originally Posted by hillc95 View Post
FWIW it took me one kit to swap over to using a reamer anytime I final "drill" any holes.....Vans put out a video highly recommending reaming over drilling as well
So you're saying that I should match drill using the drill bits but final drill using an appropriately sized reamer?
Reply With Quote
  #8  
Old 02-22-2021, 09:38 AM
Taltruda Taltruda is offline
 
Join Date: Oct 2017
Location: Las Vegas, NV
Posts: 575
Default

There are mixed feelings about using readers. Yes, a reamer makes a more perfect hole, but a rivet expands to fill even an imperfect hole. It may be better to have an imperfect hole filled in by a rivet, as it grips or bites better into the imperfections. Does it really matter? Will a plane fall out of the sky because your holes are too smooth? Will it not win Grand Champion because your holes are rough inside where the rivets expand?
__________________
Tom
Las Vegas
RV-8 empenage finished 10-2020

Wings Started.. 11-2020
Reply With Quote
  #9  
Old 02-22-2021, 10:40 AM
Mckay Mckay is offline
 
Join Date: Dec 2019
Location: Prescott, Az
Posts: 40
Default

There are no mixed feeling on reaming holes in primary structure.
Reply With Quote
  #10  
Old 02-22-2021, 10:54 AM
Taltruda Taltruda is offline
 
Join Date: Oct 2017
Location: Las Vegas, NV
Posts: 575
Default

Quote:
Originally Posted by Mckay View Post
There are no mixed feeling on reaming holes in primary structure.
Holes for bolts, pins, ect.. reamed holes are ideal. Want even better surface finish? Why not hone holes? But for rivets, a drill makes a perfectly acceptable hole. If you ever had to drill out a rivet in a reamed hole, the rivet shank is more likely to spin, while in an imperfect drilled hole, they don’t spin and are much harder to push out the shank. I am perfectly content drilling my rivet holes as opposed to reaming, unless it’s in a place where I can’t access between sheets to deburr, then I’ll ream to minimize the burr that’s created by a drill. Thousands of RVs are flying around with drilled holes, many more other planes, so to the person (Caribbean10) who asked if they NEED to drill undersized then team to final size, the answer is no you do not.
__________________
Tom
Las Vegas
RV-8 empenage finished 10-2020

Wings Started.. 11-2020
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 03:23 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.