RC_Fanatic

My Feedback: (1)

Anyone have experience with the Dubro EZ-Fill valve? http://www3.towerhobbies.com/cgi-bin...?&I=LXWDG9&P=7 I'd tried the Quick-Fill ones but they always leaked (usually air) after a few cycles. I usually use a 3-line system but can't with the setup in one plane.

jetmech05

I wont use one...I like the 3 line system

flyinwalenda

My Feedback: (5)

I don't care for them either, Seen one of the newer type cause troubles. I'd just use a regular "T" fitting and a fuel dot.
What is preventing you from using a third line ?

JohnBuckner

My Feedback: (1)

I through away a large collection of fueling valves of many brands some time back and I did not want to give them away as I would have felt to guilty.

I also abandoned three line systems some time back and these days only use two line systems, cowlings are never a problem and it is so much easier with fewer failure points and never ever agine have to look for lost fuel dots in the dirt.


John

scale only 4 me

My Feedback: (158)

What is preventing the 3-line system from being possible?,, I too stopped using those type valves,, the will leak sooner or later

RC_Fanatic

My Feedback: (1)

The plane has a 16 oz Hayes fuel tank and I can't see how install a second line inside for the fill/drain. My experience with a 2-line system using a "T" for filling is that, when filling, fuel leaks into the carb and either floods the engine or makes a mess inside the cowling. On this plane, there is no easy way to get a hemostat in to clamp off the line at the carb. What I have now is a brass "U" connected to lines from the tank and to the carb that come through the side of the fuselage. I pull the lines out, disconnect the one to the tank and fill through that line. The original owner had the fuel filter on the outside and disconnected one of the lines to it to refuel. I think the reason for the engine stopping resulting in a crash is that the fuel filter came adrift in the air! [:@]

Yes, I could get a different tank! That's probably the only solution. Getting the tank in and out is a hassle but...

JohnBuckner

My Feedback: (1)

The Hayes tank is not the problem, The problem is the insistance on using an unneccessary third line. Hayes tanks are far superior to the ordinary bung plug type with more reliabilty and the bung plug never rots. Far easyier to to use and assemble. Never a lost fuel dot in the dirt, Much faster fueling.

With over fifty plug an play birds almost all are now Hayes and the two line system.

I posted many pictures in the past with aircraft using a cowl and the two line system I will post one of them agine. I can hear the cry of anguish over an extra hole the cowling even over the internet but consider this since I started using Hayes and a two line system almost exclusively perhaps about eight years ago you will be hardpressed to find any of our local flyers still using a valve and/or third lines. Wonder why?

John

JohnBuckner

My Feedback: (1)

In addition this method offers the all important access if one practices tunning two stroke glow engine to a pinch. Its far easier and more accurate method than a tach in my opinion for two stroke glow engines. Its a method I make sure all my students are proficient at. Problem is ya can,t do it if ya got no place to pinch fuel feed line.

RC_Fanatic

My Feedback: (1)

John,

What you show is essentially what I have now! Since I already have the two holes, there is no additional pain and anguish! Guess I'll stick with it so you can paint another cross on your plane for another 3-line system shot down.

JohnBuckner

My Feedback: (1)

Yes indeed it is, the only diff is I just make the loop of fuelline and that way you can do the pinch rather than with a 'U' shaped tube. Great give it a chance, you will likely come to love the hayes tanks with a two line system.

For what its worth I can remove and re install the 'O' ring plug indefinately and no leaks and no way can you do that with a conventional. it will leak profusely after not to many install cycles also the rubber plug will harden and crack far faster than the 'O' ring will.

By the way the hayes is also usable with gasolene with no pickup tube or 'O' ring changes like you have to do with the conventionals.

The only problem with Hayes is the largest tank is the 16 ounce I did discuss this with those folks at a dealer show last year and the price of tooling up larger tanks is prohibitive in this economc climate. I do use the 16 in one of my 55 OS GT's powered airplane but this is not a problem for this old man who gets tired after five or six minites and there is plenty of fuel left.

I also have the sixteen in a very vintage 124 inch giant floater with an OS 33 GT and since the throttle never really goes above a full idle that ship can fly around a half hour.

John

Oh I forgot this two line system is even superior with the engine completely exposed and has a remote needle valve. I see those folks using needle nose or forceps trying to reinstall the fuel line on the rear needle inlet and cussing it. Its so simple to just cut the feedline wherever is quick and easy and put your little tube there

Here are some photos on my little combat thing and its now so quick and easy

JollyPopper

My Feedback: (6)

Hey John, that is kinda cool. I have two questions about it. Does the front line ever drop into the cowl while you are fueling the plane or have the lines disconnected for whatever reason, and is there anything to prevent you (or me) installing the outer ring of a fuel dot to make it look finished?
Max

JohnBuckner

My Feedback: (1)

Thanks max, I suppose the secret of not having a hose slip back and this has never been a problem for me on anything is to make the tubes long enough. Contrary to popular opinion this does not present running problems.

What I do on every new ship it to install one very long hose through both holes (sometimes is a single slot all the way to the rear edge of the cowl so cowling instalation or removal is a zip. I make the cut joint so they both will protrude out the hole a ways and after fueling just tuck it up close. This involve a little experimentation in working out where the cut is to be and how long both hoses ends up.

If you want the decorative ring sure why not? there is no reason not to.

Here are some more:

John

RC_Fanatic

My Feedback: (1)

My Father had a saying "Anything worth doing is worth doing to excess!" I'm sure John will see this as excessive. However, in my defense, I did not chrome it!

JollyPopper

My Feedback: (6)

John, I like it. That solves a problem that I have been wrestling with the past few days. I am at the stage of running fuel lines for an RV-4 build and I bought one of those very valves that RC_Fanatic started this thread with and was toying with whether or not to use it and if I did, where to put it. This solves that problem. This cowl has huge chipmunk cheeks on it. I can simply drill two holes on the top side of the cheek on the right side of the plane and do John's thing. Problem solved. And it won't ever leak. Such a simple solution to a problem.
Max

JohnBuckner

My Feedback: (1)

Yes indeed that is essentiallly the same and will also work perfectly fine, please note I even suggested that you stick with it.

There is no pain and anguish coming from me, Max delighted I could help you.


John

kwblake

Does Hayes have a website? When I google it, all I get is suppliers.

RC_Fanatic

My Feedback: (1)

– If you need more information, use these Hayes resources – Phone: 714-554-0531. And you need to call when Mike is there!

acdii

Needs more bling!

OldRookie

My Feedback: (13)

Describe your pinch test method.
I tried this years ago, and didn't really see how pinching the lines and seeing the results were anywhere close to the accuracy of a good ear, or a good tachometer.

Greg

JohnBuckner

My Feedback: (1)

Pinch tuning is tunning by ear Old Rookie and it is nothing more than tunning the high speed needle in response to a rapid and consistant pinch of the fuel feed done with the same timing and by the same individual every time.

As you know if you actually did try at some point that its simply a realization as to which way the main needs to change and how much by the engines response to this rapid and consistant pinch.

Is it intuiitive? well yes of course and if you think about it perhaps less so than even a tach which always involves setting to some arbitrary point (fill in the blank) below peak.

It is a highly effective method if one takes the time to practice it and is consistant in the way the pinch is performed.

John

sensei

No fuel valves for me. I also use two lines in the tank, one feed and one vent but I place a T fitting on the fuel feed line and run that to my Dubro fuel dot.

Bob