What ballast system?

Hi. I have been asked by a mate to help him with the dive system on his Oberon submarine build. Can anyone point me in the right direction for a bladder type air ballast system? Can only find stuff in USA.. This thing is enormous!

Hi,

Build a number of diffenet type now. For a bladder system i used a screen water unversal pump and a blood pressure bag.

How big of a tank are you needing.

I have a 1meter by 90mm acrylic tube to fit everything in. Guessing at least 1 liter. New to submarines, more into steam myself...

Hi,

lloyds adult blood pressure cuff what i've used for seawolf conversion and unvesal screen pump from eurocar parts.

You will need a solinod value to other wise the water in the bag will force it way out.

If you are after a Gyro give me a heads up.

cheers
Tim