Car dealers seem to have access to really large balloons. You might talk to them about a source. Otherwise you will probably be limited to 1-1/2 ounce or so.

Greetings!  Man, why don'tcha' jus' save yourself a bunch of headaches .... getcha' one of these, clamp it in place and have some fun!

Oval Profile Uniflow Fuel Tank 2-1/2 oz.   by Brodak
SKU#BH-589
$12.00

I'd have to cut into the wood, the plumbing is all wrong...  That is just trading headaches around.  Not a bad thought though.

Phil

The tank is original to the plane as far as I know.  I am at least the second person to fly it, and it had a few other owners too.  I think it is a Perfect wedge... but the tank was mashed a little to fit the space.

I would make a pinched corner type using some gallon olive oil tin can, slightly thicker than .008, more like .015 but I have a pile of it.  Just needs an acetone wash to remove any remaining residues.

http://aeromaniacs.com/Tips.html
the George Aldrich uniflow at the bottom, but probably not uniflow in this case.

I have some rather large balloons that hold close to 3 oz of fuel without stretching, they are called "large party balloons" from the grocery store.  This is why I wanted to know about a Fox on a non-pressure bladder.

Phil

Phil,
You can use the non-pressure bladder but do a test first to make sure the fuel doesn't melt it. One way I have seen it done is to put the balloon inside a plastic tank without the stopper. This contains the fuel in the event of a leak. The arrangement I've seen is to have the pickup tubing have several holes along it's length, this is suppose to keep the balloon from cutting off flow as the fuel is drawn out. Keep all the edges smooth.

Other option is to order the Brodak tank over the phone and tell them to ship it via regular mail (you can't do this online). This is around $3 vs $12 for the normal priority mail.

Best,    DennisT