VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


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 01-13-2019, 11:05 AM
JonJay's Avatar
JonJay JonJay is offline
 
Join Date: Jan 2007
Location: Battleground
Posts: 4,066
Default

If it is flush with the plexi, can you remove the canopy and expose the end of the broken tap? If so you might be able to get some vice grips on the stub.

Not familiar with the 14 roll bar. Is it aluminum or steel?

Good lubricant for aluminum or steel - Boelube.
Good cheap lubricant for aluminum - kerosene.
__________________
Smart People do Stupid things all the time. I know, I've seen me do'em.

RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
Reply With Quote
  #12  
Old 01-13-2019, 12:20 PM
RV6_flyer's Avatar
RV6_flyer RV6_flyer is offline
 
Join Date: Jan 2005
Location: NC25
Posts: 3,080
Default Rescue Bit

I once used a Rescue Bit to remove a broken 1/4" tap.

I have an 1/8" Rescue Bit in my tool box.
__________________
Gary A. Sobek
NC25 RV-6
Flying
3,300+ hours
Where is N157GS
Building RV-8 S/N: 80012

To most people, the sky is the limit.
To those who love aviation, the sky is home.
Reply With Quote
  #13  
Old 01-13-2019, 04:51 PM
jfisher jfisher is offline
 
Join Date: Jan 2018
Location: C27
Posts: 14
Default

Thanks everyone for the feedback. Lots of really good options!

I will be sorting out a priority of things to try (buy) tomorrow when I talk to Vans and a few vendors.

Feeling much better today. Big lesson learned yesterday. What a humbling experience this building stuff can be.

- Jim
__________________
Jim Fisher
140411 Began 1/5/18
Tail kit and QB fuselage done
Finish kit in progress
QB wings summer 2019
Reply With Quote
  #14  
Old 01-14-2019, 08:14 PM
jfisher jfisher is offline
 
Join Date: Jan 2018
Location: C27
Posts: 14
Default

Final update - success!!

Talked to Sterling @ Vans' tech support today and he suggested heating up the broken tap with a soldering iron until the plexi melted enough to lift right off. Said I was not the first one to do this.

Worked like a charm. Only took a few minutes. Removed the window, and then had enough of the tap left sticking out of the rollbar to grab it with some pliers and work it loose and unscrew it.

Goes to show it's never as bad as it seems.
__________________
Jim Fisher
140411 Began 1/5/18
Tail kit and QB fuselage done
Finish kit in progress
QB wings summer 2019
Reply With Quote
  #15  
Old 01-14-2019, 08:22 PM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 1,903
Default

I like it. Found a way.
__________________
Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com
Reply With Quote
  #16  
Old 01-14-2019, 08:33 PM
Kyle Boatright Kyle Boatright is offline
 
Join Date: Aug 2005
Location: Atlanta, GA
Posts: 3,507
Default

Quote:
Originally Posted by jfisher View Post
Final update - success!!

Talked to Sterling @ Vans' tech support today and he suggested heating up the broken tap with a soldering iron until the plexi melted enough to lift right off. Said I was not the first one to do this.
Question - why wouldn't the plans have you drill the plexi and the rollbar, remove the plexi, and *then* tap the rollbar? Obviously, I'm missing something.
__________________
Kyle Boatright
Atlanta, GA
2001 RV-6 N46KB
2019(?) RV-10
Reply With Quote
  #17  
Old 01-14-2019, 10:04 PM
JDA_BTR JDA_BTR is offline
 
Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 687
Default

I think it is because in a subsequent step the plexi is drilled a little bigger and countersunk. When you tap with the smaller plexi hole it tends to keep the plexiglass next to the frame closer and not pucker up; it also makes it easier to tap at the right 90 degree angle. Any scratches created by the tap are drilled away in the next step when the hole is enlarged.
__________________
Ser 104142, RV-14A
N1463
Ready to gas it up!
Urologist, AME
Reply With Quote
  #18  
Old 01-15-2019, 09:28 AM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,998
Default

Quote:
Originally Posted by Kyle Boatright View Post
Question - why wouldn't the plans have you drill the plexi and the rollbar, remove the plexi, and *then* tap the rollbar? Obviously, I'm missing something.
One of the more common canopy installation errors is screw holes that are not tapped straight.
This could be dealt with in many different ways but this was chosen as a simple method since the canopy is already in place to act as a guide.

BTW, don't use cheap-o taps. The best choice, especially for a novice to using them, is a quality two flute tap bought from somewhere like MSC.
3 and 4 flute taps have a smaller cross section and break much more easily if the torque gets high.
__________________
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
Reply With Quote
  #19  
Old 01-15-2019, 09:50 AM
sblack sblack is offline
 
Join Date: Dec 2009
Location: Montreal
Posts: 1,313
Default

don't forget to advance half a turn, retract 1/4 turn or until you feel the chip break off. If the tap starts to be hard to turn, retract it and clean out the chips. And as another poster said, cheap tools will cost a lot in the long run. American tools (drill bits etc) cost a lot more, but there is just no comparison in quality most of the time. When I started buying $$$ drill bits I couldn't believe the difference in finish, ease of use, longevity and fewer broken bits.

Also, slightly off topic, the main reason drill bits break is not because of sideload, it is because the flutes get full and the bit jams. Not relevant to drilling aluminum sheet, but it's good general knowledge. IN the machining world, you drill down 2 diameters, then retract and clear the trips. It's called peck drilling and cnc machines do it. If you don't your holes won't be straight and you will break bits.
__________________
Scott Black
RV 4, with an engine...and other stuff
VAF dues 2018
Reply With Quote
  #20  
Old 01-15-2019, 12:33 PM
Bob Kuykendall's Avatar
Bob Kuykendall Bob Kuykendall is offline
 
Join Date: Sep 2006
Location: Douglas Flat, CA
Posts: 581
Default

Someone should make a sticky note about 6-32 taps. Because of their combination of small diameter and (relatively) coarse threads, they are the taps most likely to break.
__________________
Bob Kuykendall
HP-24 kit sailplane
EAA Technical Counselor
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 04:45 PM.


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.