fuel cap vents
-
- Veteran Member
- Posts: 922
- Joined: Wed Mar 14, 2007 11:29 pm
- Location: Seattle WA
fuel cap vents
Dennis, I think it was on your plane that I saw some lower profile, nicer looking ones than the standard bent tubes.
Did you buy them?
Thanks
Did you buy them?
Thanks
- scubarider2
- Topic Moderator
- Posts: 1086
- Joined: Mon Jan 28, 2008 7:03 pm
- Location: Cleveland, GA
nope
Nope, used the ones they gave me. Low to the wing but long to the front.
I am still having some problems with the left side though. Still putting some gas out the tube. Maybe just too full. Not leaking after a couple gallons used so must be that. I cleaned and lightly sanded the inside of the tank which made no more leaking from the cap.
D
I am still having some problems with the left side though. Still putting some gas out the tube. Maybe just too full. Not leaking after a couple gallons used so must be that. I cleaned and lightly sanded the inside of the tank which made no more leaking from the cap.
D
-
- New Member
- Posts: 11
- Joined: Tue Dec 25, 2007 11:46 pm
- Location: hockessin, Delaware
fuel cap vents
Hi, guys,
I have the caps with tabs that flip up (after a mighty lift and pull), and Tim told me to drill vent holes through only the top surface of the cap, not all the way through. I can't figure out how that will vent the tank. Anyone have any experience or suggestions?
Thanks.
I have the caps with tabs that flip up (after a mighty lift and pull), and Tim told me to drill vent holes through only the top surface of the cap, not all the way through. I can't figure out how that will vent the tank. Anyone have any experience or suggestions?
Thanks.
John Smoyer
- scubarider2
- Topic Moderator
- Posts: 1086
- Joined: Mon Jan 28, 2008 7:03 pm
- Location: Cleveland, GA
did the same
Yep, did the same. You can only drill through the top section since the bottom section is the one that moves to seal the cap to the tank. It does vent, mine does and maybe too well. One side leaking. Not sure why the other is not. hmmmmm Be careful when you bond the vent tube also. I made that first mistake and bonded it to the bottom, too much epoxy. It would not open and close. So had to heat, remove and rebond. Now works ok.
Dennis
Dennis
-
- Veteran Member
- Posts: 184
- Joined: Thu Aug 17, 2006 12:20 am
I drilled the top to allow the tube to be inserted and epoxied in place. I also drilled the bottom piece, otherwise I did not see how it would vent.
I just took the cap apart, drilled both portions, and then made sure that the hole in the top was not directly in line with the bottom when I tightented the lock nut.
Dave
I just took the cap apart, drilled both portions, and then made sure that the hole in the top was not directly in line with the bottom when I tightented the lock nut.
Dave
-
- Veteran Member
- Posts: 282
- Joined: Mon Aug 14, 2006 11:53 am
- Location: Orwigsburg, PA
-
- Seasoned Member
- Posts: 82
- Joined: Mon Aug 28, 2006 2:06 pm
- Location: Salcedo-Cotopaxi-Ecuador
Hi Paul,
If you seen on the tank, it has some internal divisions. On this site, the fiber glass is wider, I drilled a hole just on the side of the division and put some epoxy. It is quite rigid. I think I wil have no problem. The other system on drilling the cap I don´t really understand how it works if you don´t drill the internal side of the cap. I had some doubts about the good work of the cap after doing the drilling ( fuel leaking, etc)
That is all,
Uwe/.
If you seen on the tank, it has some internal divisions. On this site, the fiber glass is wider, I drilled a hole just on the side of the division and put some epoxy. It is quite rigid. I think I wil have no problem. The other system on drilling the cap I don´t really understand how it works if you don´t drill the internal side of the cap. I had some doubts about the good work of the cap after doing the drilling ( fuel leaking, etc)
That is all,
Uwe/.
- scubarider2
- Topic Moderator
- Posts: 1086
- Joined: Mon Jan 28, 2008 7:03 pm
- Location: Cleveland, GA
weird
It is weird how it works but it does. I only drilled the top and put the tube in just like the directions have you do. The vent WORKS. I can see gas fumes escaping. As I have said I do have one that leaks gas out of the tube though. Not sure why one but not the other. It is not leaking now due to the drop in fuel in the tank {after flying it for awhile :D }
Dennis
Dennis
-
- Veteran Member
- Posts: 282
- Joined: Mon Aug 14, 2006 11:53 am
- Location: Orwigsburg, PA
Uwe,
I was wondering about putting the vent tube even farther towards the cockpit to allow more room for when the wings are folded and to avoid fuel seepage out. I see it is reinforced along the edge as well. The one thing I question about doing this right on the edge is that if I recal some type of gap cover goes over this section. I don't recall any pieces from JA for this in my kit but I remember seeing Troy fold unfold one to reveal this gap as it was not visible once in flight mode or unfolded. I will be folding regularly so I'm looking for the best option. I'd prefer to fill it up before storage to keep out moisture. On the other hand, others on here have had no problems with just drilling the caps but I wonder if anybody really uses the fold option as much??
Paul, PA
I was wondering about putting the vent tube even farther towards the cockpit to allow more room for when the wings are folded and to avoid fuel seepage out. I see it is reinforced along the edge as well. The one thing I question about doing this right on the edge is that if I recal some type of gap cover goes over this section. I don't recall any pieces from JA for this in my kit but I remember seeing Troy fold unfold one to reveal this gap as it was not visible once in flight mode or unfolded. I will be folding regularly so I'm looking for the best option. I'd prefer to fill it up before storage to keep out moisture. On the other hand, others on here have had no problems with just drilling the caps but I wonder if anybody really uses the fold option as much??
Paul, PA
-
- Seasoned Member
- Posts: 82
- Joined: Mon Aug 28, 2006 2:06 pm
- Location: Salcedo-Cotopaxi-Ecuador
Hi Paul and Dennis
We don´t need to forget that these venting tubes are not only for ventilation but also for pressurized the fuel tanks while flying. THis is why I still don´t understand how the drill caps works.
Paul, I believe you could place the venting tubes on the closer side of the tank to the cockpit, so when you fold the wings they stay on the higher place and won´t have a fuel leakeage, if you fix the tubes on the tank you will have a problem, since you´ll change the tubes direction. They will end up perpendicular with the air flow producing a ventury and it will suck the fuel from the tanks to the outside.
I have an idea, I am giving you some numbers on pieces of Spruce since I am not sure on how to explain this in English.
You could place AN816 NIPPLE on the tank, size 1/4 Steel 4-4; then you put a NUT sleeve Coupling in the tubes, this way you can release the nut and turn the tubes to the other side when you fold the wings, this will always make the tubes will be right with the airflow; or just place a plug in the tubes when you fold the wings.
I hope you get the idea, I think the people who already placed the tubes in the caps also will need to rotate the caps when they fold the wings to prevent the ventury suction.
Regards, Uwe/.
We don´t need to forget that these venting tubes are not only for ventilation but also for pressurized the fuel tanks while flying. THis is why I still don´t understand how the drill caps works.
Paul, I believe you could place the venting tubes on the closer side of the tank to the cockpit, so when you fold the wings they stay on the higher place and won´t have a fuel leakeage, if you fix the tubes on the tank you will have a problem, since you´ll change the tubes direction. They will end up perpendicular with the air flow producing a ventury and it will suck the fuel from the tanks to the outside.
I have an idea, I am giving you some numbers on pieces of Spruce since I am not sure on how to explain this in English.
You could place AN816 NIPPLE on the tank, size 1/4 Steel 4-4; then you put a NUT sleeve Coupling in the tubes, this way you can release the nut and turn the tubes to the other side when you fold the wings, this will always make the tubes will be right with the airflow; or just place a plug in the tubes when you fold the wings.
I hope you get the idea, I think the people who already placed the tubes in the caps also will need to rotate the caps when they fold the wings to prevent the ventury suction.
Regards, Uwe/.
-
- Veteran Member
- Posts: 922
- Joined: Wed Mar 14, 2007 11:29 pm
- Location: Seattle WA
- Johnny C!
- Veteran Member
- Posts: 826
- Joined: Thu Sep 07, 2006 9:55 am
- Location: Brevard, NC
Dave,
I guess you could buy two extra fuel caps & not install
the tubes for those times when you want to cover the aircraft.
I think it would be a little risky drilling into the top
of the tanks. If you happen damage that joint, it
could leave you in a real bind to replace the tank.
I'll live with the ram tubes in the caps...
John
I guess you could buy two extra fuel caps & not install
the tubes for those times when you want to cover the aircraft.
I think it would be a little risky drilling into the top
of the tanks. If you happen damage that joint, it
could leave you in a real bind to replace the tank.
I'll live with the ram tubes in the caps...
John
There are many things that happen really fast when you are
flying an airplane. There is no sense in rushing any of the others.
I would much rather be looking down at the runway, than up at it.
Duane Sorenson & Rick Norton Gone West 6/8/09. Godspeed
flying an airplane. There is no sense in rushing any of the others.
I would much rather be looking down at the runway, than up at it.
Duane Sorenson & Rick Norton Gone West 6/8/09. Godspeed
-
- Veteran Member
- Posts: 922
- Joined: Wed Mar 14, 2007 11:29 pm
- Location: Seattle WA
Maybe if the caps were left loose John. Still need venting for cool nights turning to hot days...Johnny C! wrote:Dave,
I guess you could buy two extra fuel caps & not install
the tubes for those times when you want to cover the aircraft.
I think it would be a little risky drilling into the top
of the tanks. If you happen damage that joint, it
could leave you in a real bind to replace the tank.
I'll live with the ram tubes in the caps...
John
I guess Cessna type vents on the bottom of tanks must have a pressure valve?