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-14
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 01-15-2019, 11:39 PM
wjb's Avatar
wjb wjb is offline
 
Join Date: Nov 2012
Location: Half Moon Bay, CA
Posts: 1,121
Default

I've been hand drilling the countersinks in my cowl using some carbide-burr countersink bits with great results. Go slow, and check often. All have come out just right.
__________________
Bill Bencze
N430WB RV-7 @KHAF, Flying 100+ hrs
VAF 2021 donation happily made
Reply With Quote
  #12  
Old 01-16-2019, 12:23 PM
bk1bennett's Avatar
bk1bennett bk1bennett is offline
 
Join Date: Nov 2015
Location: Sachse, TX
Posts: 81
Default

I used a drill press and my calibrated eyeball.
__________________
=========================================
Latest Donation Dates: 06 August 2020 & Dec 2020
=========================================
RV-14A Empennage Kit #140396
=========================================
Reply With Quote
  #13  
Old 01-16-2019, 06:05 PM
RV10Pilot RV10Pilot is offline
 
Join Date: Jan 2005
Location: Medford, NJ USA
Posts: 475
Default

How about something like this
Reply With Quote
  #14  
Old 01-16-2019, 06:34 PM
scard's Avatar
scard scard is offline
 
Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 3,368
Default

Yep. I call it kamikaze counter sinking or dimpling. Free hand can liberate you from the cage . Just be darn sure you can meet your quality assurance expectations before ruining a part. The other such operation is a dimple die in the rivet gun and it's companion in a backing buck. Do you feel lucky? <smily face fully implied!>

Once you get over the pressures, angles, and all the ways this could go wrong, you'll be moving right along without so much jig analysis. I know a Boeing production engineer would be squirming in his seat, but we aren't build a space shuttle here.
__________________
Scott Card
CQ Headset by Card Machine Works
CMW E-Lift
RV-9A N4822C flying 2200+hrs. / Cedar Park, TX
RV8 Building - fuselage / showplanes canopy (Done!)
VAF Advertiser
Reply With Quote
  #15  
Old 01-16-2019, 08:13 PM
ColoCardinal's Avatar
ColoCardinal ColoCardinal is offline
 
Join Date: May 2010
Location: Morrison, CO
Posts: 372
Default countersink

. . or you could replace them with an internal stop: https://www.flyboyaccessories.com/In...top-p/2102.htm
__________________
Carl - - Morrison, CO
N16CB RV7A
Airworthiness cert issued 12/24
best X-mas present I could have hoped for!
paid 'til 10-19
Reply With Quote
  #16  
Old 01-19-2019, 03:56 PM
RonS RonS is offline
 
Join Date: Nov 2018
Location: Roswell, GA
Posts: 32
Default

Hit this same issue last week. I picked up a paint cutter arbor from Spruce which is threaded to accept my CS cutter and mounted it in the drill press. https://www.aircraftspruce.com/catal...utterarbor.php

__________________
Ron Slosberg
Roswell, GA
RV-14A N3318S -- Flying

Build Log: https://ronslosberg.com
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 11:22 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.