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02-26-2023, 04:21 PM
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Join Date: Oct 2016
Location: Cranberry Twp, PA
Posts: 79
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Anyone recognize these tailcone fasteners?
Another detail I noticed on the Van's built 12iS I saw last week was the fasteners holding the top portion of the tailcone fairings. The screws that pass through the fiberglass into the nutplates underneath appear to have a washer under them. It seems like this might help to protect the fiberglass over time - and also help protect the paint.
Anyone know what's being used here?
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02-26-2023, 04:48 PM
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Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,698
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They look like the sort of countersunk washers that Aircraft Spruce sells.
Dave
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02-26-2023, 05:20 PM
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Join Date: Oct 2007
Location: Jackson, MS
Posts: 1,677
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Tinnerman washers
__________________
Webb Willmott
KJVW
RV8 - Current Build
N414WW Reserved
V35B - Flying
RV7A - N32WW (Sold)
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02-26-2023, 06:48 PM
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Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,923
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Quote:
Originally Posted by Webb
Tinnerman washers
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Make certain 100 degree countersink for aviation flathead screws....
__________________
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Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 850 
LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father - CFI) - USAAF 1st Lt. Captain B-17H
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02-26-2023, 07:43 PM
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Join Date: Dec 2019
Location: Highland, CA
Posts: 613
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Did they also use them on the fiberglass faring on the front of the vertical fin? Wheel pants would be another place.
__________________
Live as if you were to die tomorrow. Learn as if you were to live forever.
visit my blog - http://waltsrv12.com
-- Walt --
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02-27-2023, 05:56 AM
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Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,923
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I use them on my airplane for all flathead screws...
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__________________
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Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 850
LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father - CFI) - USAAF 1st Lt. Captain B-17H
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02-27-2023, 08:18 AM
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Join Date: Dec 2019
Location: Highland, CA
Posts: 613
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Quote:
Originally Posted by Piper J3
I use them on my airplane for all flathead screws...
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My plane is built / painted using the panhead with nylon washers, can it be converted? Will it require repainting each screw area?
__________________
Live as if you were to die tomorrow. Learn as if you were to live forever.
visit my blog - http://waltsrv12.com
-- Walt --
Last edited by seagull : 02-27-2023 at 09:41 PM.
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02-27-2023, 08:39 PM
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Join Date: Jan 2015
Location: Oklahoma City, OK
Posts: 888
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Tinerman washers as mentioned above can be purchased through Aircraft Spruce. I keep a stock of these in my parts box, size 6, 8, and a few 10. Always good to keep some in stock.
__________________
Jim Harris ATP, 2008 RV7A, 2nd owner, N523RM (2015) Superior XPIO-360 B1AA2, MT9 CS prop, Two PMags, Dual GRT Horizon EX with ARINC, EIS, Garmin 340, 335 w/WAAS gps, Dual 430s (non-WAAS), TruTrak 385 A/P with auto level & trim, Tosten 6 button Military Grips, Dynon D10A w/battery backup, 406 MHz ELT, Mountain High O2, CO2 monitor, Flyleds Works system, Custom Interior, TS Flightline hoses, ETX900 Battery, Bruce Cover
Retired - Living the dream - going broke! 
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02-28-2023, 06:52 AM
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Join Date: May 2005
Location: Tuttle, Oklahoma
Posts: 2,786
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Quote:
Originally Posted by seagull
My plane is built / painted using the panhead with nylon washers, can it be converted? Will it require repainting each screw area?
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Can it be converted?
YES
Will it require repainting each screw area?
NO
You will have to countersink the screw holes. A few turns with a handheld deburring tool is all it takes. |
02-28-2023, 08:05 AM
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Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 2,047
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Quote:
Originally Posted by RVbySDI
Can it be converted?
YES
Will it require repainting each screw area?
NO
You will have to countersink the screw holes. A few turns with a handheld deburring tool is all it takes.
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Clarification of above process - this applies to fiberglass fairing’s & components only.
If you have a metal to metal cover that you wish to convert, much bigger process involving dimpling, changing nut plates, & probably some painting
__________________
Ralph
Now retired - my builder assist shop now closed, 
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