Originally Posted by aspeed
It is ok with a bladder. I have seen it done many moons ago with a 1/8" hole in a BBee, and it worked for a few flights then. Just a stock BBee or Golden Bee or silver or pink or whatever always seem to go rich to lean at the end of the tank on suction.
Yep. Pressure feed usually cuts out with no great variation at end of run, one reason Jim Walker liked using it.
The Fireball plans explain how to make a balloon tank with a toy balloon from the 5 and 10 cent store, and the Walker pressure regulator was the ultimate add on- they still show up on eBay and elsewhere today.
The more things change, the more they stay the same.
They used to run a real neat "Jim Walker" multi-task C/L event up in Canada, don't know if they still do or not.