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Drilling hole in fuel filler tube

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tonyrenshaw268(at)gmail.c
Guest

Posted: Tue Oct 18, 2011 3:11 am Post subject: Drilling hole in fuel filler tube

Giddy,

I am about to drill 1 or 2 holes in the neck of the fuel filler tube, for anti syphon and vent. If I had a T piece ai suppose I could just drill 1 hole, but I have seen others with 2, so feel I am safe to follow. I have plastic drill bits including 3/8", and am wondering about advice in affixing the black grommets rubber plug variety as sold by Spruce, with the bsyonet metal fitting,

. Anyone done this before who can share any advice???

Reg

Tony Renshaw 



Sent from my iPad

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frans(at)privatepilots.nl
Guest

Posted: Tue Oct 18, 2011 3:52 am Post subject: Drilling hole in fuel filler tube

On 10/18/2011 01:07 PM, Tony Renshaw wrote:

 	  Quote: 	
		   I am about to drill 1 or 2 holes in the neck of the fuel filler tube, for anti syphon and vent. If I had a T piece ai suppose I could just drill 1 hole, but I have seen others with 2, so feel I am safe to follow. I have plastic drill bits including 3/8", and am wondering about advice in affixing the black grommets rubber plug variety as sold by Spruce, with the bsyonet metal fitting,

 . Anyone done this before who can share any advice???


	


Use 2 holes, you need the top of the fuel filler tube as a "plenum". The 

fuel vent from the tank not only releases air during filling, but also a 

good deal of fuel. You will want the fuel to return to the tank, and the 

air to escape.



Also, my mistake was to project the opening of the tube somewhat in the 

direction of the fuel cap. So during filling when the tank is almost 

full, the tube starts spitting out splashes of fuel which is quite a 

nuisance.



For securing the metal tubes I used some Araldite. It is fuel resistant 

and appears to hold very well on the fuel filler neck.



Frans

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klinefelter.kevin(at)gmai
Guest

Posted: Tue Oct 18, 2011 4:13 am Post subject: Drilling hole in fuel filler tube

Tony, I used a step drill and opened the hole just big enough to start

an AN pipe thread fitting, which cut its own threads into the plastic.

Then a filet of redux.

Kevin



On 10/18/11, Tony Renshaw <tonyrenshaw268(at)gmail.com> wrote:

 	  Quote: 	
		   



 Giddy,

 I am about to drill 1 or 2 holes in the neck of the fuel filler tube, for

 anti syphon and vent. If I had a T piece ai suppose I could just drill 1

 hole, but I have seen others with 2, so feel I am safe to follow. I have

 plastic drill bits including 3/8", and am wondering about advice in affixing

 the black grommets rubber plug variety as sold by Spruce, with the bsyonet

 metal fitting,

 . Anyone done this before who can share any advice???

 Reg

 Tony Renshaw



 Sent from my iPad

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

grahamsingleton(at)btinte
Guest

Posted: Tue Oct 18, 2011 10:25 am Post subject: Drilling hole in fuel filler tube

Tony

run the tank breather in 3/8 aluminium from top of tank to just below top of filler cobra. Then run the in flight breather in 1/4" down to just behind and below the flap.

Metal is best but needs to be grounded to prevent static build up. Fuel droplets in a plastic tube and hi speed airflow will charge up like raindrops in a thunderstorm.

Happened at least once that I know of.

I've attached a pik, the blue fittings are bulkhead swaged fittings, easiest way to attach if a bit expensive.

Graham



From: Frans Veldman <frans(at)privatepilots.nl>

To: europa-list(at)matronics.com

Sent: Tuesday, 18 October, 2011 12:50:18

Subject: Re:  Drilling hole in fuel filler tube



--> Europa-List message posted by: Frans Veldman <frans(at)privatepilots.nl (frans(at)privatepilots.nl)>



On 10/18/2011 01:07 PM, Tony Renshaw wrote:

 	  Quote: 	
		   I am about to drill 1 or 2 holes in the neck of the fuel filler tube, for anti syphon and vent. If I had a T piece ai suppose I could just drill 1 hole, but I have seen others with 2, so feel I am safe to follow. I have plastic drill bits including 3/8", and am wondering about advice in affixing the black grommets rubber plug variety as sold by Spruce, with the bsyonet metal fitting,

 . Anyone done this before who can share any advice???


	


Use 2 holes, you need the top of the fuel filler tube as a "plenum". The fuel vent from the tank not only releases air during filling, but also a good deal of fuel. You will want the fuel to return to the tank, and the air  to escape.



Also, my mistake was to project the opening of the tube somewhat in the direction of the fuel cap. So during filling when the tank is almost full, the tube starts spitting out splashes of fuel which is quite a nuisance.



For securing the metal tubes I used some Araldite. It is fuel resistant and appears to hold very well on the fuel filler neck.http://forums.matronics.                    &nbsptronics.com/contribution" target="_blank">http://www.matronics.com/contri================

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