|
-
POSTING RULES
-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|
10-20-2013, 05:09 PM
|
 |
|
|
Join Date: Jan 2005
Posts: 963
|
|
Nav position lights install
Is there any reason not to cutout the position light wingtip cutout before the wingtip skin is attached?
Bob
__________________
Bob Hassel
NM
Subscription Paid for 2020
Home is where the hanger is...
|
10-20-2013, 06:28 PM
|
 |
|
|
Join Date: Aug 2010
Location: Irvine, CA
Posts: 416
|
|
That's what I did. If there's a reason not to, I didn't discover it.
__________________
John Halcrow
Tustin, CA
RV-12 120682
Emp/TC done; Wings done; Fuse kit done
"History teaches us that men and nations behave wisely once they have exhausted all other alternatives." --Abba Eban
Paid up until Aug 2021
|
10-05-2014, 08:34 AM
|
 |
|
|
Join Date: Dec 2011
Location: Sacramento
Posts: 64
|
|
Why is the nav/position light hole in the bottom wingtip skin so big? All it does is pass three small wires, yes?
|
10-05-2014, 09:20 AM
|
 |
|
|
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,026
|
|
Quote:
Originally Posted by kevinl4000
Why is the nav/position light hole in the bottom wingtip skin so big? All it does is pass three small wires, yes?
|
Because it was designed to be a retrofitable installation since the lighting kit was initially available for early builders, or in instances where the airplane was initially built without, but added later. As long as the pull string specified in the wing manual was installed and tied off where specified, during the wing build, the prescribed hole provides enough access for pulling in the required wires.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
|
10-05-2014, 10:00 AM
|
|
|
|
Join Date: Dec 2011
Location: Sacramento
Posts: 64
|
|
Okay so it's specifically for a retrofit installation. Good to know, thanks.
What if, as in my case, I'm installing the nav light and wingtip extension as I'm closing out the wing tip bottom skin(s)? Wouldn't a 3/8" hole (or smaller?) and grommet fulfill the purpose?
Would that be considered a deviation from the plans and, if so, would it matter, since the hole (large or small), is covered up by the fiberglass wingtip extension and unlikely to be seen?
|
10-05-2014, 10:04 AM
|
 |
|
|
Join Date: Aug 2010
Location: Marshall TX (KASL)
Posts: 1,783
|
|
Much easier to cut before attachment and no downside.
|
10-05-2014, 10:16 AM
|
|
|
|
Join Date: Dec 2011
Location: Sacramento
Posts: 64
|
|
Quote:
Originally Posted by Bill_H
Much easier to cut before attachment and no downside.
|
Yes, of course. But if the bottom wingtip skin (W1204D) isn't riveted on yet, why would you even need the <big> template hole, when a small <easy> 3/8" hole will do?
Last edited by kevinl4000 : 10-05-2014 at 12:52 PM.
Reason: added part #
|
10-05-2014, 12:57 PM
|
 |
|
|
Join Date: Oct 2005
Location: Highland Village, TX
Posts: 1,519
|
|
There is a good reason
I had the same question when I was cutting those big holes - it didn't seem to make a lot of sense. However, I was wrong.
When you go to install the ground wire, you need to be able to install the wire and the retaining nut on the inside of the wing tip. You won't be able to install the ground wire per the plans if you don't have the large hole. I'm sure you could figure a way to install the ground wire without the big hole but then the connection would be totally inaccessible.
The large hole was also useful for deburring the holes you drill to mount the fiberglass mount and cleaning out drill shavings.
__________________
Rick Aronow,
A&P
Flying 7A Slider;
RV-12 SOLD
Highland Village,TX
Last edited by Rick_A : 10-05-2014 at 01:01 PM.
Reason: added a sentence
|
10-06-2014, 12:19 AM
|
|
|
|
Join Date: May 2010
Location: Benaraby Queensland. Australia
Posts: 209
|
|
Plus. A large hole weighs less than a small hole.
|
10-06-2014, 03:58 PM
|
|
|
|
Join Date: Jul 2010
Location: SF Bay Area
Posts: 247
|
|
Did mine during build - used a smaller hole. Didn't see the need to make such a big cutout.
__________________
http://jimsrv.blogspot.com
PP - ASEL
Instrument Rating
A&P/IA Rotax iRMT 9 Series Maintenance
EAA Technical Counselor
RV12 Flying.
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 11:12 AM.
|
Linear Mode
