Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


Fuel tank question? Cox_ba12




Fuel tank question? Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Cox 020 PeeWee rebuild questions
by rdw777 Today at 2:15 pm

» COX .020 POWERED SPEEDSTER
by TD ABUSER Today at 2:09 pm

» My N-1R build log
by roddie Today at 12:29 pm

» Ultrasonic Cleaners??
by OVERLORD Today at 9:08 am

» *Cox Engine of The Month* Submit your pictures! -November 2024-
by roddie Today at 6:08 am

» Took an engine out last week
by OVERLORD Today at 4:31 am

» **VOTE-ON-THE-NEXT-COX-ENGINE-OF-THE-MONTH** (November 2024)
by Admin Today at 1:27 am

» K&B Sea Fury outboard engine, casting and box repair
by ffkiwi Yesterday at 7:45 pm

» Cox NaBOO - Just in time for Halloween
by rsv1cox Yesterday at 6:38 pm

» Drones, pretty nifty...........
by rdw777 Yesterday at 4:00 pm

» TEE DEE Having issues
by davidll1984 Yesterday at 7:01 am

» Throttle control for Cox .010 "Viking" engine.
by davidll1984 Yesterday at 6:18 am

Cox Engine of The Month
October-2024
MauricioB's

"Cox .049 Circa 1975, custom."



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


Fuel tank question? Empty
Live on Patrol


Fuel tank question?

Go down

Fuel tank question? Empty Fuel tank question?

Post  oldguy Sat Dec 19, 2020 12:47 pm

Is my thinking on this correct about this tank?   With the vent tube on the bottom of the tank, shouldn't that tube travel up to the top of the inside of the tank, to fully fill the tank with fuel before it starts to vent over, i believe it should.  This  tank  is 1" in  height, if i use a piece of wire and insert it into the vent pipe it only travels 1/2" into the tank and stops.  But the pipe is open if i blow thru it?   I have spoken to the supplier of the tank, and the response was it is hitting the fold inside the tank where the ends are folded over and solder up.   So if that's the case my understanding is the tank will vent over when it is half full am i thinking this correctly?
oldguy
oldguy
Gold Member
Gold Member

Posts : 368
Join date : 2015-12-10
Age : 70
Location : Idaho

Back to top Go down

Fuel tank question? Empty Re: Fuel tank question?

Post  Ken Cook Sat Dec 19, 2020 1:48 pm

I personally open every tank by removing the back. Too many issues with all of the suppliers and some are far worse than others. If your tank is a Brodak tank, I would clean the exterior of the tank flux it where it penetrates and the pipe itself and reheat and push it all the way in. Air test under water with a 5 oz. syringe like your trying to pop it.
Ken Cook
Ken Cook
Top Poster
Top Poster

Posts : 5623
Join date : 2012-03-27
Location : pennsylvania

Back to top Go down

Fuel tank question? Empty Re: Fuel tank question?

Post  oldguy Sat Dec 19, 2020 1:53 pm

Ken Cook wrote:           I personally open every tank by removing the back. Too many issues with all of the suppliers and some are far worse than others. If your tank is a Brodak tank, I would clean the exterior of the tank flux it where it penetrates and the pipe itself and reheat and push it all the way in.

It's not a Brodak tank,  for what this tank has cost me now, i should just bought a kit from brodak and assembled my own. I'm sure that is what i am going to end up doing,  but is my thinking correct though, it's going to vent fuel over, when it is only  half filled the way it is setup now? Also there is not enough pipe to just heat and push it in, won't be enough pipe protruding out for my liking. But i have some 1/8 copper pipe.
oldguy
oldguy
Gold Member
Gold Member

Posts : 368
Join date : 2015-12-10
Age : 70
Location : Idaho

Back to top Go down

Fuel tank question? Empty Re: Fuel tank question?

Post  Ken Cook Sat Dec 19, 2020 2:05 pm

The overflow pipes are typically not soldered inside. Removing it should be quite easy. When you install the new one, don't leave the end inside the tank square, file a slight bevel on it so that you don't block it off.
Ken Cook
Ken Cook
Top Poster
Top Poster

Posts : 5623
Join date : 2012-03-27
Location : pennsylvania

Back to top Go down

Fuel tank question? Empty Re: Fuel tank question?

Post  Cribbs74 Sat Dec 19, 2020 3:51 pm

Why not get a graduated syringe and see how much it holds before overflowing? Seems to be a quicker way to see if it’s plumbed correctly.
Cribbs74
Cribbs74
Moderator

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 11907
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK

Back to top Go down

Fuel tank question? Empty Re: Fuel tank question?

Post  oldguy Sat Dec 19, 2020 4:19 pm

Cribbs74 wrote:Why not get a graduated syringe and see how much it holds before overflowing? Seems to be a quicker way to see if it’s plumbed correctly.

I can do that.
oldguy
oldguy
Gold Member
Gold Member

Posts : 368
Join date : 2015-12-10
Age : 70
Location : Idaho

Back to top Go down

Fuel tank question? Empty Re: Fuel tank question?

Post  944_Jim Sun Dec 20, 2020 10:07 am

Sounds like someone short-piped the tank on that run for whatever reason. Then the vent holes could be drilled into/across the pipe just inside the tank. It is probably the one the builder intended to cap during pressure operation, or allows for different fill capacities with one tube shorter than the other. So filling from m the top tube would be different than the bottom tube (may have to invert the plane during fueling).

_________________
Never enough time to build them all...always enough time to smash them all!
944_Jim
944_Jim
Diamond Member
Diamond Member

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 2021
Join date : 2017-02-08
Age : 59
Location : NE MS

Back to top Go down

Fuel tank question? Empty Re: Fuel tank question?

Post  oldguy Sun Dec 20, 2020 12:18 pm

944_Jim wrote:Sounds like someone short-piped the tank on that run for whatever reason. Then the vent holes could be drilled into/across the pipe just inside the tank. It is probably the one the builder intended to cap during pressure operation, or allows for different fill capacities with one tube shorter than the other. So filling from m the top tube would be different than the bottom tube (may have to invert the plane during fueling).

Jim this is a new tank.

So i did try filling the tank and it does take close to 3 0z. to fill, but i wanted to see why i can only insert the wire half way into the tank, i pulled the end cap off to see the vent tube, it has a bend in it to get around the seam, at that bend is where the wire is hitting and stopping. So onto installing the tank and finish sheeting the tank wing area.
oldguy
oldguy
Gold Member
Gold Member

Posts : 368
Join date : 2015-12-10
Age : 70
Location : Idaho

Back to top Go down

Fuel tank question? Empty Re: Fuel tank question?

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum