On Apr 27, 2:09*pm, Scott Alexander
wrote:
The forecast tommorow looks fantastic down here in Memphis! *Looks
like perfect conditions to load up on water.

My guess is that the clear plastic peice is for sealing. *The cirrus
wasn't designed with bags, it was designed with fiberglass water
tanks. *The water ballast bags are an aftermarket addition.

No experience with this particular installation but many years
expeience with bags. If both the holes you describe are in the part
of the root rib that closes the D tube then my guess is that the bags
are fed in the large hole and then the fill/dump tube is brought out
through the small hole. Explanation obviously wrong if the dump ports
are in the wings not the fuselage.

I doubt there are many ballast bag installations that remained exactly
as the factory intended. I consider adding piccolo pipes an almost
essential modification. No one who ever experienced a pinched off bag
failing to dump would ague with this.

Figuring this out and testing the system is probably not the best use
of the few hours you have before your flight attempt.

Andy